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Heterostructural composite of few‐layered MoS 2 /hexagonal MoO 2 particles/graphene as anode material for highly reversible lithium/sodium storage
Author(s) -
Wu Manman,
Liu Cong,
Ma Tengfei,
Tang Mingyi,
Shen Jiandong,
Ji Hongmei,
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.4963
Subject(s) - graphene , molybdenum disulfide , anode , materials science , lithium (medication) , composite number , oxide , chemical engineering , hydrothermal circulation , electrochemistry , nanotechnology , composite material , metallurgy , electrode , chemistry , medicine , endocrinology , engineering
Summary The heterostructural construction of metal disulfide/oxide is essential in the electrochemical performance as anode material for lithium‐ and sodium‐ion batteries (LIBs and SIBs). In this work, an integrated composite of molybdenum disulfide (MoS 2 ) and hexagonal molybdenum dioxide (MoO 2 ) together enwrapped in reduced graphene oxide (rGO) is synthesized under hydrothermal condition. In the pelletizing MoS 2 ‐MoO 2 /rGO composite, rGO as substrate effectively prevents the restacking and pulverization of MoS 2 ‐MoO 2 during a long cycling process. Meanwhile, the synergistic effect among the MoS 2 , MoO 2 , and rGO components are responsible for abundant active sites and shorten ionic transport channels. When evaluating as anode material for LIB, MoS 2 ‐MoO 2 /rGO sample presents excellent cyclic performance and still delivers a high capacity of 1062.3 mA h g −1 after 120 cycles at 0.2 A g −1 ; evaluating in a SIB at 0.04 A g −1 , it presents excellent cyclic performance and delivers 430 mA h g −1 at the 80th cycle. The heterostructural composite MoS 2 ‐MoO 2 /rGO is one of the candidate anode materials for high‐performance LIB and SIB.