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Tailoring MoS 2 Ultrathin Sheets Anchored on Graphene Flexible Supports for Superstable Lithium‐Ion Battery Anodes
Author(s) -
Wang Tian,
Xu Zhanwei,
Yang Jun,
Liu Xinyue,
Cheng Yayi,
Li Jia,
Shen Xuetao,
Huang Jianfeng
Publication year - 2019
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.201900197
Subject(s) - graphene , anode , materials science , electrode , oxide , stack (abstract data type) , lithium (medication) , current density , battery (electricity) , power density , lithium ion battery , optoelectronics , nanotechnology , degradation (telecommunications) , ion , chemical engineering , electrical engineering , power (physics) , chemistry , metallurgy , computer science , medicine , physics , engineering , quantum mechanics , endocrinology , organic chemistry , programming language
2D MoS 2 has a significant capacity decay due to the stack of layers during the charge/discharge process, which has seriously restricted its practical application in lithium‐ion batteries. Herein, a simple preform‐in situ process to fabricate vertically grown MoS 2 nanosheets with 8–12 layers anchored on reduced graphene oxide (rGO) flexible supports is presented. As an anode in MoS 2 /rGO//Li half‐cell, the MoS 2 /rGO electrode shows a high initial coulomb efficiency (84.1%) and excellent capacity retention (84.7% after 100 cycles) at a current density of 100 mA g −1 . Moreover, the MoS 2 /rGO electrode keeps capacity as high as 786 mAh g −1 after 1000 cycles with minimum degradation of 54 µAh g −1 cycle −1 after being further tested at a high current density of 1000 mA g −1 . When evaluated in a MoS 2 /rGO//LiCoO 2 full‐cell, it delivers an initial charge capacity of 153 mAh g −1 at a current density of 100 mA g −1 and achieves an energy density of 208 Wh kg −1 under the power density of 220 W kg −1 .