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Interfacial Bonding of Metal‐Sulfides with Double Carbon for Improving Reversibility of Advanced Alkali‐Ion Batteries
Author(s) -
Ge Peng,
Zhang Liming,
Zhao Wenqing,
Yang Yue,
Sun Wei,
Ji Xiaobo
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201910599
Subject(s) - materials science , anode , electrochemistry , chemical engineering , alkali metal , prussian blue , carbon fibers , lithium (medication) , energy storage , ion , battery (electricity) , metal , nanotechnology , electrode , composite material , metallurgy , thermodynamics , chemistry , organic chemistry , medicine , power (physics) , physics , composite number , engineering , endocrinology
Abstract Engineering interfacial properties of metal‐sulfides toward excellent electrochemical capability is imperative for advanced energy‐storage materials. However, they still suffer from an unclear mechanism of capacity fading, along with ineffective physical–chemical evolution. Herein, a highly‐effective Sb 2 S 3 with double carbon is designed with interfacial SbC bonds and double carbon, which boosts promoting of ion transferring and alleviates the separation of both active phases (Sb, S). Through “voltage‐cutting” manners, the key elements of capacity improvement about phase transitions are further determined. As expected, even at 5.0 A g −1 , the lithium‐storage capacity remains about 674 mAh g −1 . Utilized as sodium ion battery (SIB) anode, the rate capacity still reaches up to 366 mAh g −1 at 3.0 A g −1 , much larger than that of Sb 2 S 3 . Obtaining the full cell of Ni–Fe Prussian blue analog versus M‐Sb 2 S 3 @DC, the reversible capacity is 330 mAh g −1 at 0.5 A g −1 . Supported by kinetic analysis, the excellent rate properties are determined by the surface‐controlling behaviors, mainly resulting from the decreased capacitive resistance and improved ion moving. Furthermore, the reassembling evolution of active phases is revealed in detail by ex situ techniques. This work is expected to offer significant insights into interfacial evolutions toward advanced energy‐storage systems.