Structure and electrochemical characterization of Li1+xMn2-xO4 spinels for rechargeable lithium batteries

Toshimi Takada, Hiroshi Hayakawa, Hirotoshi Enoki, Etsuo Akiba, Helen Slegr, Isobel Davidson, John Murray

Research output: Contribution to journalConference articlepeer-review

33 Citations (Scopus)

Abstract

Neutron and X-ray powder diffraction and Rietveld refinements have been carried out for the well-crystallized samples with a homogeneous composition Li1+xMn2-xO4 (0 ≤ x ≤ 0.125). The lattice parameter of these spinels changes with both the composition and the synthesis temperature. SEM and TEM micrographs show that the crystallites appear as single crystals with a size of 0.1-2 μm. The phase transition from cubic Fd3m to orthorhombic Fddd around 280 K of samples Ei1+xMn2-xO4 (x ≤ 0.04) was observed using low temperature XRD and DSC. The orthorhombic phase further converts to a single tetragonal phase I41/amd around 65 K. The charge/discharge capacity, and cyclability of these samples were examined in both the 3 V and the 4 V regions. We found that the discharge capacity as well as the cyclability of the cell Li/Li1+xMn2-xO4 change largely with not only the value of x but also the crystal structure which depends on the synthesis conditions.

Original languageEnglish
Pages (from-to)505-509
Number of pages5
JournalJournal of Power Sources
Volume81-82
DOIs
Publication statusPublished - Jan 1 1999
EventProceedings of the 1998 Ninth International Meeting on Lithium Batteries - Edingburgh, United Kingdom
Duration: Jul 12 1998Jul 17 1998

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Structure and electrochemical characterization of Li<sub>1+x</sub>Mn<sub>2-x</sub>O<sub>4</sub> spinels for rechargeable lithium batteries'. Together they form a unique fingerprint.

Cite this