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Carbon nanofiber activated by molybdenum disulfide as an effective binder‐free composite anode for highly reversible lithium storage
Author(s) -
Wu Manman,
Liu Cong,
Sun Rui,
Yu Tianjiao,
Li Yuhong,
Yang Gang
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.5241
Subject(s) - molybdenum disulfide , anode , carbon nanofiber , materials science , lithium (medication) , composite number , electrochemistry , electrode , nanofiber , carbon black , chemical engineering , carbon fibers , nanotechnology , composite material , chemistry , carbon nanotube , medicine , endocrinology , engineering , natural rubber
Summary Carbon nanofiber film (CNF) as anode material for lithium‐ion batteries (LIBs) draws attention for its excellent cyclic stability, but its practical application is limited due to low specific capacity. Considering the advantages of pure CNF and MoS 2 , a flexible film which CNF covered by MoS 2 (MoS 2 /CNF) is successfully produced and evaluated as a binder‐free electrode for LIBs without mixing with carbon black and polymer binder. MoS 2 nanoflakes (8.91 wt% of the composite sample) covering on CNF (MoS 2 /CNF‐B sample) plays the key role in activating the electrochemical properties of CNF, but dense MoS 2 nanoflakes (39.4 wt%) on CNF (MoS 2 /CNF‐A) seriously limit the electrochemical properties of CNF. At 0.1 and 1.0 A g −1 , MoS 2 /CNF‐B sample delivers 967.1 and 605.7 mA h g −1 , the capacities are almost twice as much as those of pure CNF. The initial columbic efficiency of MoS 2 /CNF‐B sample of 76.4% is much higher than that of pure CNF sample of 62.1%. Moreover, MoS 2 /CNF‐B sample presents no capacity decay till 100 cycles, and the cycled electrode at the 100th cycle still maintains a stable composite structure of MoS 2 nanoflakes covering on CNF.