Improvement of cathode properties by lithium excess in disordered rocksalt Li2+2xMn1-xTi1-xO4

Ayuko Kitajou, Kosuke Tanaka, Hidenori Miki, Hideyuki Koga, Toshihiro Okajima, Shigeto Okada

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Although Li2MnTiO4 has a large theoretical capacity (295 mAh g-1), the cathode utilization is limited due to the mixed cation occupation in the disordered rocksalt structure. In this study, we have attempted to prepare single-phase Li2+2xMn1-xTi1-xO4 compositions (0 ≤ x ≤ 0.3) with Li excess to further improve the cathode properties of Li2MnTiO4. The rechargeable capacity of the synthesized Li2.4Mn0.8Ti0.8O4 composition was above 220 mAh g-1, which is larger than those of other disordered Li2MTiO4 (M = Ni, Co, Mn and Fe) series. Moreover, the discharge capacity of Li2.4Mn0.8Ti0.8O4 was ca. 190 mAh g-1 after the 15th cycle, and its capacity retention was 82%.

Original languageEnglish
Pages (from-to)597-600
Number of pages4
JournalElectrochemistry
Volume84
Issue number8
DOIs
Publication statusPublished - Aug 5 2016

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Fingerprint Dive into the research topics of 'Improvement of cathode properties by lithium excess in disordered rocksalt Li<sub>2+2x</sub>Mn<sub>1-x</sub>Ti<sub>1-x</sub>O<sub>4</sub>'. Together they form a unique fingerprint.

  • Cite this