Synthesis of Nanosized Lithium Manganate For Lithium-ion Secondary Batteries

Abstract

Nanosized lithium manganate powders are successfully synthesized via a newly developed reverse-microemulsion (R mu E) process. Monophasic LiMn2O4 powders are obtained after calcining the precursor powders at 700 deg C. The particle size of the spinel compound significantly depends on the concentration of the aqueous phase. increasing the water-to-oil volume ratio results in an increase in the particle size. While the aqueous phase is equal to 0.5 M, the size of the obtained LiMn2O4 powder is around 60-70 nm. It is found that the specific capacity of nanosized LiMn2O4 particles is greater than that of submicron particles. The large surface area of ultrafine particles is considered to facilitate the intercalation and deintercalation of lithium ions during the cycling test.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2001
Accession Number
ADP012215

Entities

People

  • Chung-hsin Lu
  • Hsien-cheng Wang
  • Ming-chang Wen
  • Yueh Lin

Organizations

  • National Taiwan University

Tags

DTIC Thesaurus Topics

  • Cells
  • Chemical Engineering
  • Current Density
  • Electrochemical Cells
  • Electron Microscopy
  • Energy
  • Field Emission
  • Lithium Ion Batteries
  • Materials
  • Nanocomposites
  • Particle Size
  • Particles
  • Scanning Electron Microscopy
  • Storage Batteries
  • Technical Information Centers
  • Transition Metals
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Nanocomposite Materials Science
  • Powder metallurgy of Titanium alloys.