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Intercalation Pseudocapacitance of Exfoliated Molybdenum Disulfide for Ultrafast Energy Storage
Author(s) -
Yoo Hyun Deog,
Li Yifei,
Liang Yanliang,
Lan Yucheng,
Wang Feng,
Yao Yan
Publication year - 2016
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201600117
Subject(s) - pseudocapacitance , molybdenum disulfide , intercalation (chemistry) , materials science , kinetics , electrolyte , molybdenum , ion , chemical engineering , inorganic chemistry , supercapacitor , chemistry , capacitance , metallurgy , electrode , organic chemistry , physics , quantum mechanics , engineering
We report intercalation pseudocapacitance of 250 F g −1 for exfoliated molybdenum disulfide (MoS 2 ) in non‐aqueous electrolytes that contain lithium ions. The exfoliated MoS 2 shows surface‐limited reaction kinetics with high rate capability up to 3 min of charge or discharge. The intercalation pseudocapacitance originates from the extremely fast kinetics due to the enhanced ionic and electronic transport enabled by the slightly expanded layer structure as well as the metallic 1T‐phase. The exfoliated MoS 2 could be also used in a Li‐Mg‐ion hybrid capacitor, which shows full cell specific capacitance of 240 F g −1 .