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Dual‐ion batteries (DIBs) are a viable option for large‐scale energy storage owing to their high energy density, low cost, and environmental friendliness. However, interfacial instability at both the cathode and anode in Li‐graphite DIBs (LG‐DIBs) contributes to poor cycling performance and failed energy storage, severely limiting their application potentials. Herein, a two‐pronged strategy is used to improve the interfacial stability, synergistically stabilizing the graphite cathode by applying a rigid/inert surface coating while building a 3D framework on the lithium anode. The resultant LG‐DIBs are ultrastable and achieve a long cycle life (capacity retention of 80% after 2700 cycles at 200 mA−1) in the all‐climate temperature range from −25 to 40 °C. Ex situ characterization reveals that the cathode–electrolyte interphase on graphite is stabilized by suppressing the electrolyte decomposition and reducing graphite exfoliation. Simultaneously, the framework constructed on the lithium anode induces uniform and dendrite‐free Li deposition owing to its 3D structure. This study not only contributes to the development of practical LG‐DIBs but also points out a promising research direction for other new types of batteries. [ABSTRACT FROM AUTHOR]

Although ether‐based electrolytes have been extensively applied in anode evaluation of batteries, anodic instability arising from solvent oxidability is always a tremendous obstacle to matching with high‐voltage cathodes. Herein, by rational design for solvation configuration, the fully coordinated ether‐based electrolyte with strong resistance against oxidation is reported, which remains anodically stable with high‐voltage Na3V2(PO4)2O2F (NVPF) cathode under 4.5 V (versus Na+/Na) protected by an effective interphase. The assembled graphite//NVPF full cells display superior rate performance and unprecedented cycling stability. Beyond that, the constructed full cells coupling the high‐voltage NVPF cathode with hard carbon anode exhibit outstanding electrochemical performances in terms of high average output voltage up to 3.72 V, long‐term cycle life (such as 95 % capacity retention after 700 cycles) and high energy density (247 Wh kg−1). In short, the optimized ether‐based electrolyte enriches systematic options, the ability to maintain oxidative stability and compatibility with various anodes, exhibiting attractive prospects for application. [ABSTRACT FROM AUTHOR]

Dual‐ion batteries (DIBs) have attracted great research interests owing to the co‐utilization of cation and anion as charge carriers. Unlike the low energy density (Eden) of supercapacitors and halogen‐ion batteries also with anion working, graphite‐cathode‐based DIBs exhibit obviously higher Eden with high working voltage. However, general electrolytes cannot satisfy the high‐energy demand for Na‐based DIBs with high power density. Herein, we design an effective electrolyte with optimized performance to limit the occurrence of side reactions during cycling, improving the cycling stability and Eden of Na‐based DIBs. Such electrolyte‐modified Na‐DIBs exhibit higher discharge plateau and specific capacity compared to the pristine batteries, contribute preeminent Eden of 370.4 Wh/kg at a high‐power density of 8888.4 W/kg (2.0 A/g), and deliver higher capacity retention of 72 % after 1000 cycles under 40 °C (1.0 A/g). All of these improvements are attributed to the interphase protection of anode/cathode by modified electrolyte, and the increase of diffusion ability under high potential. This strategy not only provides reference significance for enhancing the performance of DIBs, but also promotes the development of DIBs with high‐power/energy and long‐term cycle working condition. [ABSTRACT FROM AUTHOR]

As the power supply of the prosperous new energy products, advanced lithium ion batteries (LIBs) are widely applied to portable energy equipment and large‐scale energy storage systems. To broaden the applicable range, considerable endeavours have been devoted towards improving the energy and power density of LIBs. However, the side reaction caused by the close contact between the electrode (particularly the cathode) and the electrolyte leads to capacity decay and structural degradation, which is a tricky problem to be solved. In order to overcome this obstacle, the researchers focused their attention on electrolyte additives. By adding additives to the electrolyte, the construction of a stable cathode‐electrolyte interphase (CEI) between the cathode and the electrolyte has been proven to competently elevate the overall electrochemical performance of LIBs. However, how to choose electrolyte additives that match different cathode systems ideally to achieve stable CEI layer construction and high‐performance LIBs is still in the stage of repeated experiments and exploration. This article specifically introduces the working mechanism of diverse electrolyte additives for forming a stable CEI layer and summarizes the latest research progress in the application of electrolyte additives for LIBs with diverse cathode materials. Finally, we tentatively set forth recommendations on the screening and customization of ideal additives required for the construction of robust CEI layer in LIBs. We believe this minireview will have a certain reference value for the design and construction of stable CEI layer to realize desirable performance of LIBs. [ABSTRACT FROM AUTHOR]

Sodium-ion batteries (SIBs) represent a promising alternative to lithium-ion batteries, owing to the much higher abundance and lower cost of sodium resources in comparison with lithium. However, the electrode materials of SIBs usually suffer from more severe issues, such as low specific capacity and poor cyclability, owing to the much larger Na+ diameter and drastic volumetric variations during sodiation/desodiation. Hence, it is still a huge challenge to develop superior electrode materials for reversible Na storage. In comparison with the crystalline materials conventionally used in batteries, amorphous ones may offer a more stable framework for the uptake of Na. To address these issues, a porous composite composed of amorphous Co2P and N,B-co-doped carbon (A-Co2P/C xN yB z-650) is prepared by controlling the annealing temperature at 650 °C after freeze-drying the precursors. As-prepared A-Co2P/C xN yB z-650 exhibits much better Na-storage properties in terms of higher Na-storage capacity, longer cycling stability, and excellent rate performance compared with the crystalline counterparts. These may benefit from the fact that the amorphous framework can provide easier Na+ accessibility and better strain accommodation, originating from volumetric variations during sodiation/desodiation. More importantly, the electrolyte for all of the electrochemical tests are NaPF6 based, which is more accessible for practical applications because of its higher safety compared with the commonly used NaClO4-based electrolyte. [ABSTRACT FROM AUTHOR]

Berichtigung: Ether-Based Electrolyte Chemistry Towards High-Voltage and Long-Life Na-Ion Full Batteries Long cycle life, ether-based electrolyte, full cells, high voltage, Na-ion batteries Keywords: ether-based electrolyte; full cells; high voltage; long cycle life; Na-ion batteries EN ether-based electrolyte full cells high voltage long cycle life Na-ion batteries 1 1 1 03/16/22 20220321 NES 220321 In this Research Article, the calculated concentration values for all five electrolytes (i.e., ND-1, ND-2, NDD-3, 2.83 m NaPF SB 6 sb in DEGDME, and 3.2m-NaPF SB 6 sb in DEGDME/DOL) are inaccurate. [Extracted from the article]

High voltage, ether-based electrolyte, full cells, long cycle life, Na-ion batteries Keywords: ether-based electrolyte; full cells; high voltage; long cycle life; Na-ion batteries EN ether-based electrolyte full cells high voltage long cycle life Na-ion batteries 1 1 1 03/16/22 20220321 NES 220321 In this Research Article, the calculated concentration values for all five electrolytes (i.e., ND-1, ND-2, NDD-3, 2.83 m NaPF SB 6 sb in DEGDME, and 3.2m-NaPF SB 6 sb in DEGDME/DOL) are inaccurate. Corrigendum: Ether-Based Electrolyte Chemistry Towards High-Voltage and Long-Life Na-Ion Full Batteries. [Extracted from the article]

Tailored by flame-retardant, localized high-concentration electrolyte with relatively weakened anion-involved configuration and non-solvating fluorinated ether, the robust solid electrolyte interphase featuring well-balanced inorganic/organic components with lower resistance against K-ion transport is constructed, significantly enhancing long-term cyclic stability of K-storage in graphite. [Display omitted] Although graphite anodes operated with representative de/intercalation patterns at low potentials are considered highly desirable for K-ion batteries, the severe capacity fading caused by consecutive reduction reactions on the aggressively reactive surface is inevitable given the scarcity of effective protecting layers. Herein, by introducing a flame-retardant localized high-concentration electrolyte with retentive solvation configuration and relatively weakened anion-coordination and non-solvating fluorinated ether, the rational solid electrolyte interphase characterized by well-balanced inorganic/organic components is tailored in situ. This effectively prevented solvents from excessively decomposing and simultaneously improved the resistance against K-ion transport. Consequently, the graphite anode retained a prolonged cycling capability of up to 1400 cycles (245 mA h g−1, remaining above 12 mon) with an excellent capacity retention of as high as 92.4%. This is superior to those of conventional and high-concentration electrolytes. Thus, the optimized electrolyte with moderate salt concentration is perfectly compatible with graphite, providing a potential application prospect for K-storage evolution. [ABSTRACT FROM AUTHOR]