Sb2O3-modified LiNi1/3Co 1/3Mn1/3O2 material with enhanced thermal safety and electrochemical property

Zenghui Han, Jinpeng Yu, Hui Zhan*, Xingjiang Liu, Yunhong Zhou

*この研究の対応する著者

研究成果: Article査読

34 被引用数 (Scopus)

抄録

The layered LiMO2 (M = Ni, Co and Mn) materials LiNi 1/3Co1/3Mn1/3O2 and LiNi 0.4Co0.2Mn0.4O2 are synthesized by rheological phase method. Sb2O3-modified phases are further obtained by mechanical ball milling treatment. The structure and morphology of the bare and modified samples are characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Charge/discharge tests indicate that the modified phases all improve cycling stability, rate capability and thermal safety. Careful comparison of the charge/discharge profiles reveals that the serious polarization increment in cycling is suppressed in the Sb2O3-modified LiMO 2 electrodes. AC impedance shows that Sb2O 3/LiNi1/3Co1/3Mn1/3O2 electrode has smaller Rct and Rf value. Further analysis proves that Sb2O3 hinders the reaction between electrolyte and cathode during charge/discharge process and helps to stabilize the SEI. Other experiments prove that using Sb2O3-coated separator can achieve similar positive effect on layered LiMO2 cathode.

本文言語English
ページ(範囲)106-111
ページ数6
ジャーナルJournal of Power Sources
254
DOI
出版ステータスPublished - 2014 5月 15

ASJC Scopus subject areas

  • 電子工学および電気工学
  • エネルギー工学および電力技術
  • 再生可能エネルギー、持続可能性、環境
  • 物理化学および理論化学

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