Mesoporous Spinel LiMn2O4 Cathode Material by a Soft-templating Route

Song Chen, Zhuo Chen*, Chuanbao Cao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

A facile soft-templating method has been successfully developed to prepare mesoporous spinel LiMn2O4 with high crystallinity. The cathode material with narrow pore size distributions significantly enhances charge transfer and reduces lithium ion diffusion length. The mesoporous LiMn2O4 deliver initial discharge capacity of 133.6 mAh/g in at a current density of 74 mAh/g. After 100 cycles, discharge capacity maintains 109.1 mAh/g. At a high current density of 296 mAh/g, the mesoporous LiMn2O4 has a high discharge capacity around 102 mAh/g. Electrochemical impedance spectroscopy (EIS) testing showed that the mesoporous LiMn2O4 has a higher Li-ion diffusion coefficient (DLi) than bulk LiMn2O4. Furthermore, LiMn2O4//graphite full-cell is fabricated. It also exhibits good cycling capability with specific capacity of ∼90 mAh/g after 40 charge/discharge cycles.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalElectrochimica Acta
Volume199
DOIs
Publication statusPublished - 1 May 2016

Keywords

  • LiMnO
  • Lithium Ion Batteries
  • Mesoporous
  • Soft-templating

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