Improvement of solid-state symmetric cell performance with lithium vanadium phosphate

Eiji Kobayashi, Ayuko Kitajou, Shigeto Okada, Jun Ichi Yamaki

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We constructed a Li3V2(PO4) 3/Li1.5Al0.5Ge1.5(PO 4)3/Li3V2(PO4)3 symmetric all solid-state Li-ion battery. Since the rechargeable capacity of Li 3+xV2(PO4)3 anode is lower than that of Li3-xV2(PO4)3 cathode, the symmetric cell capacity is restricted by the anode capacity. So, the improvement of Li3+xV2(PO4)3 anode properties was tried using mechanical milling to uniformly mix Li3V 2(PO4)3 and carbon. The charge and discharge capacity of Li3V2(PO4)3/C using mechanical milling was greatly increased compared to Li3V 2(PO4)3/C using hand milling. The structure change with the insertion and extraction of lithium confirmed using ex-situ XRD measurements. The Li extraction/insertion of Li3V2(PO 4)3 with a NASICON structure can proceed to the reversible expansion/contraction of the lattice due to the structural strength and flexibility of NASICON framework with the corner-sharing matrix. The discharge capacity of the all solid-state battery per Li3V2(PO 4)3 in cathode weight achieved 92 mAh g-1 by good dispersion state of Li3V2(PO4)3 and carbon using mechanical milling.

Original languageEnglish
Pages (from-to)312-317
Number of pages6
JournalJournal of Power Sources
Volume244
DOIs
Publication statusPublished - Jan 1 2013

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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

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