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Facile Synthesis of Blocky SiO x /C with Graphite‐Like Structure for High‐Performance Lithium‐Ion Battery Anodes
Author(s) -
Xu Quan,
Sun JianKun,
Yin YaXia,
Guo YuGuo
Publication year - 2018
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.201705235
Subject(s) - materials science , anode , graphite , electrolyte , lithium (medication) , fabrication , electrode , battery (electricity) , lithium ion battery , conductivity , carbon fibers , chemical engineering , electrochemistry , nanotechnology , composite material , composite number , medicine , power (physics) , chemistry , alternative medicine , physics , pathology , quantum mechanics , engineering , endocrinology
SiO x ‐containing graphite composites have aroused great interests as the most promising alternatives for practical application in high‐performance lithium‐ion batteries. However, limited loading amount of SiO x on the surface of graphite and some inherent disadvantages of SiO x such as huge volume variation and poor electronic conductivity result in unsatisfactory electrochemical performance. Herein, a novel and facile fabrication approach is developed to synthesize high‐performance SiO x /C composites with graphite‐like structure in which SiO x particles are dispersed and anchored in the carbon materials by restoring original structure of artificial graphite. The multicomponent carbon materials are favorable for addressing the disadvantages of SiO x ‐based anodes, especially for the formation of stable solid electrolyte interphase, maintaining structural integrity of electrode materials and improving electrical conductivity of electrode. The resultant SiO x /C anodes demonstrate high reversible capacities (645 mA h g −1 ), excellent cycling stability (≈90% capacity retention for 500 cycles), and superior rate capabilities. Even at high pressing density (1.3 g cm −3 ), SiO x /C anodes still present superior cycling performance due to the high tap density and structural integrity of electrode materials. The proposed synthetic method can also be developed to address other anode materials with inferior electronic conductivity and huge volume variation.