Synthesis and electrochemical characterization of amorphous Li-Fe-P-B-O cathode materials for lithium batteries

Motoshi Isono, Shigeto Okada, Jun ichi Yamaki

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Various types of amorphous Li-Fe-P-B-O were investigated for use as a cathode material. The samples were prepared by the melt quench technique with a single roll. The samples had monotonically decreasing charge-discharge profiles peculiar to amorphous materials, and were between 76 and 119 mAh g-1. The electrochemical performance of these amorphous Li-Fe-P-B-O materials improved with increasing boron ratio, improving from 85 to 119 mAh g-1. Although the redox potentials of amorphous Li-Fe-P-O did not shift with changing P/Fe ratio, those of amorphous Li-Fe-P-B-O did shift with changing B/P ratio. The redox potentials of the Li-Fe-P-B-O in the ratios of 2/1/2/0, 2/1/1/1, 2/1/0.5/1.5, and 2/1/0/2 were approximately 3.1, 2.9, 2.6, and 2.2 V vs. Li/Li+, respectively. This demonstrates that the redox potentials of amorphous polyanionic materials can be tuned by adjusting the electronegativity of the glass former, such as phosphorus and boron.

Original languageEnglish
Pages (from-to)593-598
Number of pages6
JournalJournal of Power Sources
Volume195
Issue number2
DOIs
Publication statusPublished - Jan 15 2010

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 'Synthesis and electrochemical characterization of amorphous Li-Fe-P-B-O cathode materials for lithium batteries'. Together they form a unique fingerprint.

Cite this