Al-Ga coating mechanism and discharge-charge characteristics of Li-Mn-O cathode powders at -30-55 °c

Fei Yi Hung, Kai Yuan Yang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In the present study, LiMn2O4 cathode powders were coated with aluminum and gallium using a solution method with two-stage surface modification to obtain a Mn-based powder with an Al-Ga surface modification layer (MAG). It was found that the MAG powders have a higher capacity and excellent cycle characteristics at 55 °C at various current rates, and that the Al-Ga coating layer inhibits the precipitation of Mn ions, which increases the stability of the structure. In addition, although low temperatures generally lead to a reduction of conductivity and capacitance, the Al-Ga coating layer gives the MAG powders low-temperature resistance, with charge-discharge characteristics better at -30 °C. The Al-Ga surface modification coating layer of LiMn2O4 powder is the LiMn2-x-yAl xGayO4 phase, which reduces the negative impact of temperature variation. As a result, the MAG powders can be used for high C-rate charging-discharging.

Original languageEnglish
Pages (from-to)7-13
Number of pages7
JournalJournal of Power Sources
Volume268
DOIs
Publication statusPublished - 2014 Dec 15

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 'Al-Ga coating mechanism and discharge-charge characteristics of Li-Mn-O cathode powders at -30-55 °c'. Together they form a unique fingerprint.

Cite this