Zhenxing Zhou, Yulin Ma, Long Wang
Oct 20, 2016
Citations
0
Influential Citations
32
Citations
Journal
Electrochimica Acta
Abstract
Abstract Triphenyl phosphite (TPPi) was investigated as an electrolyte additive for high-voltage lithium-ion batteries using lithium-rich layered oxide cathode in this paper. The cyclic stability of Li 1.16 Ni 0.2 Co 0.1 Mn 0.54 O 2 was improved significantly with the adoption of 0.2 wt. % TPPi. The capacity retention of Li 1.16 Ni 0.2 Co 0.1 Mn 0.54 O 2 was improved significantly, especially at elevated temperature, from 69.0% to 89.6% after 90 cycles. Electrochemical and physical characterizations indicated that TPPi was oxidized at 4.2 V (vs. Li/Li + ), which was lower than that of the solvents and lithium extraction from Li 1.16 Ni 0.2 Co 0.1 Mn 0.54 O 2 , and the oxidization resulting in an artificial cathode interface film, which effectively inhibited the decomposition of traditional electrolyte and protected Li 1.16 Ni 0.2 Co 0.1 Mn 0.54 O 2 material from destruction.