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MoO 2 @MoS 2 Nanoarchitectures for High‐Loading Advanced Lithium‐Ion Battery Anodes
Author(s) -
Xu Zhanwei,
Wang Tian,
Kong Luo,
Yao Kai,
Fu Hao,
Li Kang,
Cao Liyun,
Huang Jianfeng,
Zhang Qinglin
Publication year - 2017
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201600223
Subject(s) - anode , materials science , molybdenum disulfide , lithium (medication) , molybdenum , battery (electricity) , nanotechnology , lithium ion battery , chemical engineering , electrode , composite material , metallurgy , chemistry , medicine , power (physics) , physics , quantum mechanics , endocrinology , engineering
The capacity loading per unit area is of importance as specific capacity while evaluating the lithium‐ion battery anode. However, the low conductivity of several advanced anode materials (such as molybdenum sulfide, MoS 2 ) prohibits the wide application of materials. Nanostructural engineering becomes a key to overcome the obstacles. A one‐step in situ conversion reaction is employed to synthesize molybdenum oxide (MoO 2 )–MoS 2 core–shell nanoarchitectures (MoO 2 @MoS 2 ) by partially sulfiding MoO 2 into MoS 2 using sulfur. The MoO 2 @MoS 2 displays a 3D architecture constructed by hundreds of MoS 2 ultrathin sheets with several layers arranged and fixed to an MoO 2 particle vertically with the size in the range of 200–500 nm. MoO 2 acts as the molybdenum source for the synthesis of MoS 2 , as well as the conductive substrate. The designed 3D architectures with empty space between MoS 2 layers can prevent the damage originated from volume change of MoS 2 undergoing charge/discharge process. The lithium storage capacities of the MoO 2 @MoS 2 3D architectures are higher and the stability has been significantly improved compared to pure MoS 2 . 4 mAh cm −2 capacity loading of MoO 2 @MoS 2 has been achieved with a specific capacity of more than 1000 mAh g −1 .