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MoO 2 /C hybrid synthesized by a facile molten‐salt‐assisted approach for high‐performance lithium‐ion batteries
Author(s) -
Gao Shasha,
Tang Yakun,
Zhao Hongyang,
Liu Lang,
Gu Yahong,
Sheng Rui
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6237
Subject(s) - anode , materials science , lithium (medication) , chemical engineering , electrochemistry , nanoparticle , molten salt , electrode , carbon fibers , battery (electricity) , nanostructure , nanotechnology , porosity , composite number , metallurgy , composite material , chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
Summary To combat the serious agglomeration and growth of the active materials, huge volume expansion and sluggish kinetics of metal oxides in the process of Li + insertion/extraction, constructing hybrid nanostructures aiming to anchor active materials has been pursued. However, it is still limited in terms of capacity decay and complex preparation process. Herein, the hybrid MoO 2 /C is synthesized through a novel molten‐salt‐assisted approach, in which isolated small MoO 2 nanoparticles were anchored on the well‐developed coal‐based porous carbon framework. The novel MoO 2 /C electrodes demonstrate enhanced electrochemical performance as Li + battery anodes with a higher capacity of 960 mAh g −1 at 200 mA g −1 , which is attributed to the synergistic effect for the uniform dispersion of MoO 2 nanoparticles and coal‐based porous carbon layer with abundant active contact sites, which is better by far than the currently reported MoO 2 ‐based electrode. Meanwhile, the hybrid MoO 2 /C exhibited improved extrinsic capacitive characteristics. Therefore, the hybrid MoO 2 /C constructed by the simple low cost strategy can be a prospective Li‐ion battery anode.