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• W3100869787 abstract "Abstract Heteroatoms in the carbon matrix are generally considered as active sites to enhance potassium storage capacity, while their adverse effects on ion batteries remain unclear. Herein, a series of sulfur doped carbon (SCDP x ) with adjustable S content and crystallinity are accurately synthesized in the closed autoclave by controlling the ratios of precursors. Electrochemical measurements exhibit that heteroatom sulfur displays double‐edged electrochemical activities with a high initial potassium storage capacity but poor cycling stability for carbon anode. Combined with solid‐state nuclear magnetic resonance (NMR), catalytic tests, and various ex‐situ characterizations, it is demonstrated that abundant S in the carbon would not only form CSC bonds, acting as active sites to reversibly adsorb/desorb potassium ions for high capacity, but also significantly catalyze the reduction and decomposition of the electrolyte including KPF 6 and ethylene carbonate/diethyl carbonate (EC/DEC) to form thicker solid electrolyte interface (SEI) and degrade electrolyte, resulting in rapid capacity decay. As a result, the optimized sample (SCDP2) with the appropriate sulfur doping content exhibits the best electrochemical performance with high capacity (688.4 mA h g −1 at 100 mA g −1 ), long‐term cycling stability (198.4 mA h g −1 at 2000 mA g −1 after 10 000 cycles), and excellent rate capability (238.8 mA h g −1 at 5000 mA g −1 )." @default.
• W3100869787 created "2020-11-23" @default.
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• W3100869787 date "2020-11-20" @default.
• W3100869787 modified "2023-10-18" @default.
• W3100869787 title "Revealing the Double‐Edged Behaviors of Heteroatom Sulfur in Carbonaceous Materials for Balancing K‐Storage Capacity and Stability" @default.
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• W3100869787 doi "https://doi.org/10.1002/adfm.202006875" @default.
• W3100869787 hasPublicationYear "2020" @default.
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