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Simply Constructing Li 1.2 Mn 0.6 Ni 0.2 O 2 /C Composites for Superior Electrochemical Performance and Thermal Stability in Li–Ion Battery
Author(s) -
Chen Dandan,
Xie Dongjiu,
Li Guangshe,
Zhang Dan,
Fan Jianming,
Li Baoyun,
Feng Tao,
Li Liping
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803236
Subject(s) - x ray photoelectron spectroscopy , materials science , xanes , annealing (glass) , fourier transform infrared spectroscopy , thermal stability , cathode , analytical chemistry (journal) , electrochemistry , spectroscopy , chemical engineering , composite material , electrode , chemistry , chromatography , physics , quantum mechanics , engineering
A Co‐free Li‐rich cathode material Li 1.2 Mn 0.6 Ni 0.2 O 2 has been successfully modified by conductive acetylene black (CAB) using a simple physical grinding and post annealing process. X‐ray photoelectron spectroscopy (XPS), X‐ray absorption near‐edge structure (XANES) and Fourier transform infrared spectra (FTIR) characterizations show that annealing process leads to the formation of a strong chemical interaction between CAB and Li 1.2 Mn 0.6 Ni 0.2 O 2 . The modified sample with 5wt% CAB exhibits excellent cycle stability (83.9% capacity retention after 100 cycles at 1 C) and remarkable rate capacity (93.0 mAh g −1 at 10 C). At the same time, the thermal stability of pristine is obviously enhanced by modification with CAB. Such improvement is ascribed to the existence of the strong interaction between Li‐rich oxide and CAB. This work will offer hints for promoting the commercialization of Li‐rich cathodes.