High entropy spinel oxide nanoparticles for superior lithiation-delithiation performance

Thi Xuyen Nguyen, Jagabandhu Patra, Jeng Kuei Chang, Jyh Ming Ting

研究成果: Article同行評審

64 引文 斯高帕斯(Scopus)

摘要

High entropy spinel oxide (HESO) nanoparticles were synthesizedviaa surfactant-assisted hydrothermal method and used as a novel anode material in a lithium-ion battery. The HESO consists of non-equimolar cations of Cr, Mn, Fe, Co, and Ni dispersed in two Wyckoff sites with various valence states. Due to a strong entropy-induced phase stabilization effect of the HESO, no inactive MgO structural pillars, which are exclusively present in the reported rock salt type high entropy oxides, are required to achieve high electrode cycling stability. A superior charge-discharge capacity of 1235 mA h g−1, the highest among all known HEOs, is obtained with 90% capacity retention after 200 cycles. The unique HESO is also characterized by plenty of oxygen vacancies and three-dimensional Li+transport pathways. Also, great high-rate performance,i.e., 500 mA h g−1@ 2000 mA g−1, of the HESO electrode is demonstrated.

原文English
頁(從 - 到)18963-18973
頁數11
期刊Journal of Materials Chemistry A
8
發行號36
DOIs
出版狀態Published - 2020 9月 28

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 可再生能源、永續發展與環境
  • 材料科學(全部)

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