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Ultra‐Fast Cycling of Nanoscale Thin‐Film LiCoO 2 Electrodes in Aqueous Electrolytes
Author(s) -
Clancy Tomás M.,
Rohan James F.
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800822
Subject(s) - nanoscopic scale , materials science , electrode , thin film , electrochemistry , electrolyte , aqueous solution , diffusion , kinetics , chemical engineering , sputtering , analytical chemistry (journal) , nanotechnology , chemistry , chromatography , physics , quantum mechanics , engineering , thermodynamics
Additive‐free nanoscale LiCoO 2 thin‐films deposited on Si substrates using DC sputtering show exceptional electrochemical performance due to the unique kinetics of the nanoscale thin‐film in aqueous environment. At extremely high scan rates and galvanostatic current densities of up to 100 mV s −1 and 200 C respectively, a capacity retention equivalent to 97 mAh g −1 (4.8 μAh cm −2 , 48.3 μAh cm −2 μm −1 ) is obtained. A significant contribution of non‐diffusion controlled kinetics in a LiCoO 2 electrode is shown.