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Artificial Interface Derived from Diphenyl Ether Additive for High‐Voltage LiNi 0.5 Mn 1.5 O 4 Cathode
Author(s) -
Yue Hong Yun,
Han Zhan Li,
Tao Liang Liang,
Zhang Yao Fa,
Wang Lan,
Li Xiang Nan,
Yin Yan Hong,
Yang Wei Guang,
Yang Shu Ting
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.201800011
Subject(s) - electrolyte , dissolution , decomposition , cathode , ether , materials science , chemical engineering , chemistry , electrode , organic chemistry , engineering
Diphenyl ether (DPE) is investigated as a film‐forming additive to improve the cyclic stability of LiNi 0.5 Mn 1.5 O 4 at high voltage and elevated temperature (55 °C). Addition of DPE in the baseline electrolyte significantly improves the capacity retention of LiNi 0.5 Mn 1.5 O 4 at elevated temperature. Its capacity retention increases from 41.2 % at the baseline electrolyte to 90.5 % after 0.1 vol% DPE is added to the baseline electrolyte in 100 cycles. Calculations demonstrate that DPE is oxidized preferentially to the baseline electrolyte. The experimental results show that a robust and uniform film is generated on the LiNi 0.5 Mn 1.5 O 4 surface, alleviating the subsequent electrolyte decomposition and protecting LiNi 0.5 Mn 1.5 O 4 from transition metal dissolution and structural destruction.