Supercritical CO2-assisted synthesis of Lithium-rich layered metal oxide material for Lithium-ion batteries


Yalçın A., Demir M., Khankeshizadeh S., Ates M. N. , GÖNEN M., AKGÜN M.

Solid State Ionics, vol.383, 2022 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 383
  • Publication Date: 2022
  • Doi Number: 10.1016/j.ssi.2022.115991
  • Journal Name: Solid State Ionics
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Cathode materials, Li-rich layered metal oxides, Lithium-ion batteries, Supercritical CO2

Abstract

© 2022 Elsevier B.V.Lithium-rich layered oxide is recognized as prospective cathode material for next-generation batteries thanks to its high theoretical specific capacities. They, however, suffer from voltage decay, and capacity fades upon a long cycling process. Herein, a facile supercritical carbon dioxide (scCO2)-assisted method, for the first time, was applied to prepare the layered cathode material. As-prepared Li1.2Mn0.52Ni0.20Co0.08O2 cathode material exhibits a rock-like spherical morphology along with a well-developed hexagonal layered structure. The electrochemical results of Li1.2Mn0.52Ni0.20Co0.08O2 exhibit good discharge capacity and rate performance: delivering an initial discharge capacity of 235.06 mAh.g−1 at C/20, 201.60 mAh.g−1 at C/3 and 139.82 mAh.g−1 at 3C, which are better than that of the same sample prepared without scCO2. The high discharge capacity and improved rate-capability are attributed to superior well-distributed morphology and a highly crystalline layered structure. The novel synthesis strategy reported here offers several advanced Li-rich layered materials that could be further utilized in high-performance Li-ion batteries.