Tris(trimethylsilyl)borate as an electrolyte additive for improving interfacial stability of high voltage layered lithium-rich oxide cathode/carbonate-based electrolyte

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jianhui Li
  • Lidan Xing
  • Min Chen
  • Zaisheng Wang
  • Mengqing Xu
  • Weishan Li

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number20902
Pages (from-to)360-366
Journal / PublicationJournal of Power Sources
Volume285
Online published19 Mar 2015
Publication statusPublished - 1 Jul 2015

Abstract

Abstract Tris(trimethylsilyl)borate (TMSB) is used as an electrolyte additive for high voltage lithium-rich oxide cathode of lithium ion battery. The interfacial natures of Li[Li0.2Mn0.54Ni0.13Co0.13]O2/carbonate-based electrolyte are investigated with a combination of electrochemical measurements and physical characterizations. Charge/discharge tests show that the cyclic performance of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 in a mixed carbonate electrolyte is significantly improved by using TMSB. After 200 cycles between 2 V and 4.8 V (vs. Li/Li+) at 0.5 C rate, the capacity retention of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 is only 19% in the blank electrolyte, while it is improved to 74% when 0.5% TMSB is applied. The results from physical characterizations demonstrate that this excellent cyclic performance is attributed to the improved interfacial stability of Li[Li0.2Mn0.54Ni0.13Co0.13]O2/electrolyte due to the thin and protective film generated by TMSB.

Research Area(s)

  • Additive, Carbonate-based electrolyte, Cyclic performance, Interfacial stability, Layered lithium-rich oxide, Tris(trimethylsilyl)borate

Citation Format(s)

Tris(trimethylsilyl)borate as an electrolyte additive for improving interfacial stability of high voltage layered lithium-rich oxide cathode/carbonate-based electrolyte. / Li, Jianhui; Xing, Lidan; Zhang, Ruiqin; Chen, Min; Wang, Zaisheng; Xu, Mengqing; Li, Weishan.

In: Journal of Power Sources, Vol. 285, 20902, 01.07.2015, p. 360-366.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review