期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 16, 页码 13606-13613出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b02506
关键词
WS2; lithium-ion batteries; C-S bonding graphene; pseudocapacitance
资金
- National Natural Science Foundation of China [51601040, 51502039, 51572048]
Pseudocapacitance plays an important role in high-power lithium-ion batteries (LIBs). However, it is still lack of effective methods to tailor the pseudocapacitance contribution in electrode materials for LIBs. Herein, pseudocapacitance tuned by the strength of C-S bonding has been rendered in WS2 nanorods anchored on the N,S codoped three-dimensional graphene hybrid (WS2@N,S-3DG) for the first time. The pseudocapacitive contributions in the charge storage can be enhanced effectively with the increased strength of C-S bonding. As expected, the enhanced extrinsic pseudocapacitance makes WS2@N,S-3DG a fascinating electrode material for high-power LIBs, with a high reversible capacity of 509 mA h g(-1) over 500 cycles at a current density as high as 2 A g(-1). These encouraging results of pseudocapacitance opportunities for designing advanced electrode materials.
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