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Vertically Grown Few‐Layer MoS 2 Nanosheets on Hierarchical Carbon Nanocages for Pseudocapacitive Lithium Storage with Ultrahigh‐Rate Capability and Long‐Term Recyclability
Author(s) -
Liu Meng,
Fan Hao,
Zhuo Ou,
Du Xiao,
Yang Longqi,
Wang Peng,
Yang Lijun,
Wu Qiang,
Wang Xizhang,
Hu Zheng
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201805213
Subject(s) - materials science , anode , nanocages , molybdenum disulfide , lithium (medication) , nanotechnology , electrolyte , carbon fibers , energy storage , chemical engineering , composite material , electrode , power (physics) , catalysis , composite number , chemistry , medicine , biochemistry , physics , quantum mechanics , engineering , endocrinology
Molybdenum disulfide (MoS 2 ) is an intensively studied anode material for lithium‐ion batteries (LIBs) owing to its high theoretical capacity, but it is still confronted by severe challenges of unsatisfactory rate capability and cycle life. Herein, few‐layer MoS 2 nanosheets, vertically grown on hierarchical carbon nanocages (hCNC) by a facile hydrothermal method, introduce pseudocapacitive lithium storage owing to the highly exposed MoS 2 basal planes, enhanced conductivity, and facilitated electrolyte access arising from good hybridization with hCNC. Thus, the optimized MoS 2 /hCNC exhibits reversible capacities of 1670 mAh g −1 at 0.1 A g −1 after 50 cycles, 621 mAh g −1 at 5.0 A g −1 after 500 cycles, and 196 mAh g −1 at 50 A g −1 after 2500 cycles, which are among the best for MoS 2 ‐based anode materials. The specific power and specific energy, which can reach 16.1 kW kg electrode - 1and 252.8 Wh kg electrode - 1after 3000 cycles, respectively, indicate great potential in high‐power and long‐life LIBs. These findings suggest a promising strategy for exploring advanced anode materials with high reversible capacity, high‐rate capability, and long‐term recyclability.