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124 results on '"Wang, Donghuang"'

6. Ternary Stabilization Strategies for Succinonitrile-Based in Situ Polymerized Electrolyte Enabling High-Performance Solid Lithium Metal Batteries

Author

Lin, Chenyu, primary, Yang, Tianqi, additional, Zhang, Haiyuan, additional, Wang, Donghuang, additional, Zhang, Wenkui, additional, Wang, Yao, additional, Xia, Yang, additional, Huang, Hui, additional, Xia, Xinhui, additional, Gan, Yongping, additional, He, Xinping, additional, Tao, Xinyong, additional, and Zhang, Jun, additional

Published
2024
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17. Li-Doped Layered Na1.0Cu0.22Fe0.30Mn0.48O2 Cathode with Enhanced Electrochemical Performance for Sodium-Ion Batteries.

Author

Yuan, Yuanliang, Wang, Xin, Jiang, Jicheng, Guo, Can, Wang, Donghuang, and Zhou, Aijun

Subjects
ELECTROCHEMICAL electrodes, SODIUM ions, JAHN-Teller effect, TRANSITION metals, COPPER, LITHIUM, CATHODES
Abstract

The introduction of copper (Cu) element to iron-manganese-based layered cathode materials can effectively enhance their cycling stability and air tolerance. However, the low redox reactivity of Cu2+ decreases the capacity of the copper-iron-manganese layered oxide cathode material. Recently, lithium (Li) doping has been regarded as an efficient strategy to exploit high-capacity cathode materials by enabling high-covalency transition metals. Here, we report a Na1.0LixCu0.22Fe0.30Mn0.48O2 (x = 0.025, 0.05, 0.075) cathode material with increased capacity by adding Li into a Na1.0Cu0.22Fe0.30Mn0.48O2 cathode via a simple solid-phase sintering method. The doped Li element can regulate the redox reactivities of the adjacent Fe and Mn elements, leading to the promotion of the Fe redox reactivity and the suppression of Mn redox reactivity, which prevents both the Jahn–Teller effect and the structure collapse during the charge/discharge process. In conclusion, Li doping can not only improve the capacity of the cathode material but also improve its stability. When x = 0.075, the capacity of Na1Li0.075Cu0.22Fe0.30Mn0.48O2 cathode can reach 114.2 mAh g−1 with a high capacity retention of 90.2% after 300 cycles at 1 C. These results shed light on the role play of Li in the transition metal layer, and can guide the design and modification for high-performance SIBs of layered materials. [ABSTRACT FROM AUTHOR]

Published
2023
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35. A Facile Way to Construct Stable and Ionic Conductive Lithium Sulfide Nanoparticles Composed Solid Electrolyte Interphase on Li Metal Anode.

Author

Cui, Yongliang, Liu, Sufu, Wang, Donghuang, Wang, Xiuli, Xia, Xinhui, Gu, Changdong, and Tu, Jiangping

Subjects
SOLID electrolytes, LITHIUM cell electrodes, ELECTROLYTES, ANODES, IONIC conductivity
Abstract

Due to the high theoretical capacity and low reduction potential, metallic lithium is a promising anode material for the next generation of high‐energy‐density batteries. However, the dynamic Li plating/stripping process can easily destroy the unstable solid electrolyte interphase (SEI) and cause dendrite growth. Here, an artificial lithium sulfide nanoparticle composed SEI layer with superior stability and high ionic conductivity is designed by a spray quenching method. The artificial SEI layer on Li surface can effectively minimize the side reactions and suppress Li dendrite growth, and the metal electrode delivers stable cycling for 500 cycles in the symmetrical cell with carbonate electrolyte. Moreover, when this SEI‐modified Li anode is coupled with a LiFePO4 cathode, the full cell shows promoted cycling stability and rate capability. This work provides a broadly applicable and facile strategy to address the intrinsic issues of lithium metal anodes. [ABSTRACT FROM AUTHOR]

Published
2021
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37. Understanding the stabilizing effect of K+on the sodium manganese hexacyanoferrate for sodium-ion batteries

Author

Jiang, Jicheng, Guo, Can, Ali, Shamshad, Wang, Donghuang, Wang, Xin, Wei, Chaohui, Li, Jingze, Xia, Weiwei, Fu, Maosen, Sun, Wenwu, An, Naying, Zhao, Zhengwei, and Zhou, Aijun

Abstract

The outstanding cycling performance of sodium manganese hexacyanoferrate (NaMnHCF) was obtained by applying NaPF6/KPF6mixed salt solution as an electrolyte. NaMnHCF and KMnHCF are composited at the nanoscale to form a high-quality NaMnHCF/KMnHCF composite, enabling an exceptional cycling performance with more than 90% capacity retention after 500 cycles. The enhanced cycling performance is attributed to the high-quality NaMnHCF/KMnHCF composition and the pillar effect of KMnHCF. Furthermore, the superlattice of NaKMnHCF was also discovered after cycling in the mixed electrolyte, which may be partly responsible for the acquired stability. The crystal structure of the cathode material remains stable during cycling, and the cathode-electrolyte interface is more resistant to corrosion in the NaPF6/KPF6mixed electrolyte. Our work reports an effective strategy to achieve high-quality NaMnHCF/KMnHCF composites and articulates the mechanism of the stabilizing effect.

Published
2024
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38. Metal-Embedded Porous Graphitic Carbon Fibers Fabricated from Bamboo Sticks as a Novel Cathode for Lithium–Sulfur Batteries

Author

Zhang, Xuqing, Zhong, Yu, Xia, Xinhui, Xia, Yang, Wang, Donghuang, Zhou, Cheng’ao, Tang, Wangjia, Wang, Xiuli, Wu, J. B., and Tu, Jiangping

Abstract

Lithium–sulfur batteries (LSBs) are deemed to be among the most prospective next-generation advanced high-energy batteries. Advanced cathode materials fabricated from biological carbon are becoming more popular due to their unique properties. Inspired by the fibrous structure of bamboo, herein we put forward a smart strategy to convert bamboo sticks for barbecue into uniform bamboo carbon fibers (BCF) via a simple hydrothermal treatment proceeded in alkaline solution. Then NiCl2is used to etch the fibers through a heat treatment to achieve Ni-embedded porous graphitic carbon fibers (PGCF/Ni) for LSBs. The designed PGCF/Ni/S electrode exhibits improved electrochemical performances including high initial capacity (1198 mAh g–1at 0.2 C), prolonged cycling life (1030 mAh g–1at 0.2 C after 200 cycles), and improved rate capability. The excellent properties are attributed to the synergistic effect of 3D porous graphitic carbon fibers with highly conductive Ni nanoparticles embedded.

Published
2024
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46. Porous Carbon Hosts for Lithium–Sulfur Batteries.

Author

Wang, Minya, Xia, Xinhui, Zhong, Yu, Wu, Jianbo, Xu, Ruochen, Yao, Zhujun, Wang, Donghuang, Tang, Wangjia, Wang, Xiuli, and Tu, Jiangping

Subjects
LITHIUM, CARBON foams, LITHIUM sulfur batteries, CARBON, ELECTRIC conductivity
Abstract

Lithium–sulfur batteries (LSBs) are considered to be one of the most promising alternatives to the current lithium‐ion batteries (LIBs) to meet the increasing demand for energy storage owing to their high energy density, natural abundance, low cost, and environmental friendliness. Despite great success, LSBs still suffer from several problems, including undermined capacity arising from low utilization of sulfur, unsatisfactory rate performance and poor cycling life owing to the shuttle effect of polysulfides, and poor electrical conductivity of sulfur. Under such circumstances, the design/fabrication of porous carbon–sulfur composite cathodes is regarded as an effective solution to overcome the above problems. In this review, different synthetic methods of porous carbon hosts and their corresponding integration into carbon–sulfur cathodes are summarized. The pore formation mechanism of porous carbon hosts is also addressed. The pore size effect on electrochemical performance is highlighted and compared. The enhanced mechanism of the porous carbon host on the sulfur cathode is systematically reviewed and revealed. Finally, the combination of porous carbon hosts and high‐profile solid‐state electrolytes is demonstrated, and the challenges to realize large‐scale commercial application of porous carbon–sulfur cathodes is discussed and future trends are proposed. Carbon and sulfur: Despite great success, lithium–sulfur batteries (LSBs) still suffer from several problems. The design/fabrication of porous carbon–sulfur composite cathodes is regarded as an effective solution to overcome problems such as poor capacity arising from low utilization of sulfur, unsatisfactory rate performance and poor cycling life owing to the shuttle effect of polysulfides, and poor electrical conductivity of sulfur. In this review, different synthetic methods for porous carbon hosts and their corresponding integration into carbon–sulfur cathodes are thus summarized. [ABSTRACT FROM AUTHOR]

Published
2019
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50. Construction of Nitrogen-Doped Carbon-Coated MoSe2 Microspheres with Enhanced Performance for Lithium Storage.

Author

Tang, Wangjia, Xie, Dong, Shen, Tong, Wang, Xiuli, Wang, Donghuang, Zhang, Xuqing, Xia, Xinhui, Wu, Jianbo, and Tu, Jiangping

Subjects
MOLYBDENUM compounds, MICROSPHERES, LITHIUM-ion batteries, POLYMERIZATION, ELECTROCHEMICAL research
Abstract

Exploring advanced anode materials with highly reversible capacity have gained great interests for large-scale lithium storage. A facile two-step method is developed to synthesize nitrogen-doped carbon coated MoSe2 microspheres via hydrothermal plus thermal polymerization. The MoSe2 microspheres composed of interconnected nanoflakes are homogeneously coated by a thin nitrogen-doped carbon (N-C) layer. As an anode for lithium ion batteries, the MoSe2/N-C composite shows better reversibility, smaller polarization, and higher electrochemical reactivity as compared to the unmodified MoSe2 microspheres. The MoSe2/N-C electrode delivers a high specific capacity of 698 mAh g−1 after 100 cycles at a current density of 100 mA g−1 and good high rate performance (471 mAh g−1 at a high current density of 2000 mA g−1). The improved electrochemical performance is attributed to the conductive N-C coating and hierarchical microsphere structure with fast ion/electron transfer characteristics. [ABSTRACT FROM AUTHOR]

Published
2017
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