Co-free high entropy spinel oxide anode with controlled morphology and crystallinity for outstanding charge/discharge performance in Lithium-ion batteries

Thi Xuyen Nguyen, Chia Chien Tsai, Jagabandhu Patra, Oliver Clemens, Jeng Kuei Chang, Jyh Ming Ting

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Co-free high entropy spinel oxide (HESO) with all metals being active for use as anode in Li-ion battery (LIB) is demonstrated for the first time. The HESO, (CrMnFeNiCu)3O4, was synthesized via a simple and scalable hydrothermal method followed by post annealing at temperatures ranging from 800 to 1000 °C. The post annealing provides a simple way to control the particle size and crystallinity. As a result, the missing link between the anode performance and the critical factors of particle size and crystallinity/phase is reported for Co-free high entropy oxide. The HESO anode with balanced crystallinity and particle size displays optimized electrochemical performance. It shows excellent cycling stability (∼99%) after 250 cycles and the excellent rate capability. The structure evolution during cycling was examined using in operando XRD, indicating the existence of nano-crystalline structure after the lithiation/delithiation reactions. This feature is favorable for enhancing electrode cyclability. This study thus opens a new window of opportunity for the development of next-generation LIB electrode materials.

Original languageEnglish
Article number132658
JournalChemical Engineering Journal
Volume430
DOIs
Publication statusPublished - 2022 Feb 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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