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A class of topologically defective lamellar porous carbon (TDLPC) is fabricated by a thermal-driven heteroatom removal strategy using crosslinked self-assembled lamellar block copolymers as precursors. The structures (lamellar morphologies, defects, closed pores, and open pores) of TDLPC are investigated using methods such as scanning electron microscopy (SEM), Raman spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS) spectroscopy, and specific surface area and porosity analyzer. Results demonstrate that the removal of heteroatoms induces the rearrangement of adjacent carbon atoms, leading to formation of abundant topological defects as well as closed pores, while etching of in situ formed silica templates generates moderate open micro/mesopores. Specifically, defect sites with enhanced sodium adsorption can raise sloping capacity, closed pores with suitable sites for sodium filling can increase plateau capacity, and open pores with interconnected channels can facilitate ion transfer. Benefiting from the above structural advantages, when TDLPC is used as anodes for sodium-ion batteries, it can simultaneously exhibit high sloping capacity (130 mA·h/g) as well as high plateau capacity (83 mA·h/g), excellent rate performance (162 mA·h/g at 5 A/g), and long cycling stability (capacity retention of 94% after 500 cycles at 1 A/g). [ABSTRACT FROM AUTHOR]

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sodium-ion batteries are expected to gradually replace lithium-ion batteries in large-scale energy storage and two-wheeled electric vehicles because of their excellent low-temperature performance, cost advantages, and high safety. The development of sodium-ion battery anode materials with low cost, high reversible capacity, and excellent cycling stability is challenging for the industry. Because sodium ions are larger than lithium ions, graphite materials with long-range ordered structures suitable for lithium-ion battery anodes cannot be applied to sodium-ion batteries. Instead, the graphite domains of hard carbon materials are short and chaotically aligned, exhibiting a short-range ordered structure with local graphite zones inside the carbon layer. Moreover, the layer spacing of hard carbon is larger than that of graphite, which is conducive to the storage of sodium ions. Hard carbon is easily accessible and environmentally friendly, with a high carbon yield. Biomass-based hard carbon has attracted considerable attention because of its abundant raw material sources, low cost, easy accessibility, high carbon yield, environmental friendliness, and the presence of various elements. Its unique microstructure exhibits notable advantages and great commercial potential among several anode materials for sodium-ion batteries. The storage mechanism of sodium ions in hard carbon is controversial. Herein, we first analyze the adsorption behavior of sodium ions at the active sites on the hard carbon surface and the sequential process of their entry into the graphite scale layer. Moreover, we review four controversial sodium-ion storage mechanisms. Furthermore, we explore the storage mechanism of sodium ions in hard carbon and the differences between various biomass-based precursors. The content of each component and microstructure of different precursors vary, and several differences exist between nutshells, woody plants, and herbs. Their internal structural characteristics and different component contents play a key role in the performance of hard carbon. We enumerate the structural and component differences among various biomass-based precursors and summarize the distinctions in sodium-ion storage properties among different precursor hard carbons. To enhance the sodium storage performance of biomass-based hard carbon, an optimization strategy is proposed for sodium-ion battery anodes. This strategy involves manipulating the microstructure of the hard carbon anode, including adjusting the carbon layer spacing, pore structure, and specific surface area. In addition, the doping of elements, introduction of functional groups, and optimization of the electrolyte can improve the sodium storage performance of hard carbon. These insights can provide significant guidance for developing sodium-ion batteries.

Hard carbon material is an ideal anode for sodium-ion batteries due to its stable structure, high specific capacity, and good safety. Biomass and its derivatives can be used as a green and cost-effective carbon source for the production of hard carbon due to their abundant reserves and low prices. However, it is difficult to precisely control the microstructure of hard carbon materials using the traditional direct carbonization strategy, which is not conducive to improve the specific capacity and rate performanceof the materials. In this paper, porous carbon microspheres(PCGS)have been successfully prepared by spray freeze drying and low-temperature pyrolysis technique. The relationship between the structure and the electrochemical properties of the materials has been systematically investigated using characterization methods, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction(XRD), and Raman spectroscopy, combined with electrochemical tests. The results show that the sodium storage property of PCGS with average diameter of 10~60 μm is much better than that of the hard carbon materials obtained by direct carbonization method. The reversible specific capacity of PCGS was as high as 280 mA·h/g at 0. 1 C, and the specific capacity remained at 230 mA·h/g at 0. 2 C even after 100 cycles, with a capacity retention of 92%. In addition, the sodium storage mechanism of porous carbon microspheres has been investigated in this work using the in-situ Raman technique. The results of this work provide experimental references and guidance for structure modulation and performance optimization of high-performance hard carbon materials. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Integrated Intelligent Energy is the property of Editorial Department of Integrated Intelligent Energy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ceramics / Taoci Xuebao is the property of Journal of Ceramics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao is the property of Journal of Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ceramics / Taoci Xuebao is the property of Journal of Ceramics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Zhengzhou University (Natural Science Edition) is the property of Journal of Zhengzhou University (Natural Science Edition) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Accurate prediction of the remaining useful life (RUL) of sodium-ion batteries is of significant importance for large-scale energy storage systems in renewable energy applications. In this study, a feature selection-based LightGBM method is proposed to predict the RUL of sodium-ion batteries. By combining Pearson correlation coefficient and grey relational degree, four optimal features with high correlation to battery life and low autocorrelation between different features are selected. The LightGBM model is employed, and its hyperparameters are optimized using the grid search cross-validation (GridSearchCV) algorithm to achieve the best prediction performance. The superiority of the prediction model is validated using sodium-ion battery data and compared with the GBRD and RF models with GridSearchCV algorithm under the same conditions. The results demonstrate that this method significantly speeds up the model computation, and it exhibits higher reliability and better prediction performance compared to traditional algorithms. The maximum MAE, MSE, and RMSE of the predictions do not exceed 3. 0,17. 7, and 4. 2, respectively. [ABSTRACT FROM AUTHOR]

Biomass-derived hard carbon has advantages of abundant raw-material resources, sustainability, low cost, and high sodium storage capacity, making it an ideal anode material for sodium-ion batteries (SIBs). The microstructure of biomass-derived hard carbon materials is one of the key factors to influence the sodium-ion storage performance. This review summarizes the research status on the mechanism of biomassderived hard carbon anodes for sodium-ion storage. Preparation methods for the high-performance biomassderived hard carbon anodes were summarized from the point of views of biomass sources. The relationship between structural regulation and the sodium-ion storage enhancement was discussed. Last but not the least, future research directions were prospected for developing high-performance biomass-derived hard carbon anodes for SIBs. [ABSTRACT FROM AUTHOR]

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Na3V2(PO4)3(NVP) in aqueous sodium-ion batteries cathode material was prepared by hydrothermal method and doped with non-metallic N and metal ions Al and Mn to improve the electrochemical performance of NVP. The effects of doping amount on the performance modification of NVP were investigated. When the doping amount of Mn is 0.08 mol, the samples have an obvious layered structure and show the best discharge specific capacity of 439.8 F/g. The structure and morphology of NVP were characterized by XRD, SEM, BET and XPS, and the electrochemical performance of the sample was analyzed by cyclic voltammetry and charge and discharge test. The results show that all the samples are pure NVP, and ion doping does not change the crystal structure of NVP. Al doping improves the dispersion of particles, and N, Mn doping forms obvious layered structure. The discharge specific capacity of NVP is 342 F/g, and 380.8, 405, 439.8 F/g for NVP/N, NVP/Al, NVP/Mn, at a current rate of 1 A/g. Thus, it can be seen that doping with appropriate amounts of metal ions and non-metal elements can significantly improve the aqueous electrochemical performance of NVP.

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Electrochemistry is the property of Journal of Electrochemistry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Molecular Science is the property of Journal of Molecular Science Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

MXene has a wide application prospect in energy storage, electromagnetic interference shielding, catalysis, medicine and other fields due to its unique layered structure, high electronic conductivity and rich surface chemical properties.Ti3C2Tx, as the earliest discovered MXene material, has the possibility to achieve both high energy density and power density in the field of sodium ion batteries because of its inherent metal conductive characteristics, wide layer spacing and abundant surface functional groups, which is attracted by many researchers. Based on this, the research progress of Ti3C2Tx based materials in sodium ion batteries in recent years was reviewed in this paper. Firstly, the structure and electrochemical properties of Ti3C2Tx materials with multi-layer and few-layer were summarized by introducing the preparation of Ti3C2Tx. Then, combined with the application trend of the study, the influences of layer spacing modification, doping modification and morphology regulation on the sodium storage behavior of the two kinds of Ti3C2Tx materials were summarized. The structural design ideas of the two kinds of Ti3C2Tx based composites applied to the anode of the sodium ion battery were also analyzed. It was pointed out that the reasonable structural design is vital to the battery performance. Finally, some suggestions for the problems and challenges faced by Ti3C2Tx based composites in the field of sodium ion batteries were given.

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Layered transition metal oxide cathode materials for sodium-ion batteries have the characteristics of low price and high specific capacity， which is an important support for energy transition in the future and has great development potential. In the process of charging and discharging， the typical layered oxide cathode materials with the most promising development and application will produce a series of changes affecting their electrochemical properties with the insertion and extration of sodium-ion. Therefore， the modification of cathode materials is particularly important. The current mainstream failure mechanism， modification methods， challenges and key problems to be solved in the future development are summarized and put forward. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Tiangong University is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

MoS2 with the theoretical capacity of 670 mAh g-1 has a large layer spacing, which is conductive for the insertion/extraction of Na+.However, during the charge/discharge process, MoS2 suffers volume expansion leads to stacks of sheets causing a poor capacity. Synthesis of ultra-small MoS2 flakes and composite with carbon materials can effectively solve the stacks of MoS2 during charge and discharge. In this work, ultrathin/ultrafine MoS2 was synthesized anchored on 3 D nanocarbons using unpurified crude phthalocyanine, the few-layer MoS2 provides more space to alleviate the volume expansion, and the（002） interlayer space of MoS2 is improved to 0.67 nm when immobilized on carbon materials. The obtained materials get a capacity of 356 mAh g-1 after 200 cycles at 0.1 C, coulombic efficiency remains at 99.8% [ABSTRACT FROM AUTHOR]

In this study, sycamore husk was selected as the precursor of hard carbon, and after a series process of washing, drying, grinding and impurity removal, hard carbon derived from sycamore husk-derived was successfully prepared at different carbonization temperatures. Scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and isothermal nitrogen absorption/desorption were used to study the effects of temperature on the surface morphology， phase structure and pore size distribution of the prepared samples, and their electrochemical performances were tested by galvanostatic charge/discharge, cyclic voltammetry, and electrochemical impedance spectroscopy. Results showed that the increase of carbonization temperature decreased the specific surface area, destroyed the internal pore structure and reduced the interlayer distance of hard carbon due to the graphitization effect. When the carbonization temperature raised to 1 000 ℃, the specific surface area of prepared hard carbon was 4.44 m2/g, which delivered the initial charge and discharge capacities of 290 mA·h/g and 400 mA·h/g, associated with the initial coulombic efficiency of [ABSTRACT FROM AUTHOR]

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)