Effect of Li 3 BO 3 addition to NASICON-type single-phase all-solid-state lithium battery based on Li 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3

Akira Nishio, Atsushi Inoishi, Ayuko Kitajou, Shigeto Okada

Research output: Contribution to journalArticle

Abstract

All-solid-state Li-ion battery is expected as the post Li-ion battery because of its high reliability and safety. However, the biggest issue for the all-solid-state Li-ion battery is the interfacial resistance between electrode and electrolyte rather than the bulk ionic conductivity of the solid electrolyte. In order to reduce the interfacial resistance, we recently adopted a new concept, “single-phase all-solid-state battery”, which is made of a single material. In principle, single-phase all-solid-state battery has low interfacial resistance between the solid electrolyte and electrodes, because the solid electrolyte and electrodes are same material. Here, the electrochemical properties of single-phase all-solid-state battery based on Li 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3 and the effect of Li 3 BO 3 additive as flux to Li 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3 are shown. The pellet of Li 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3 with Li 3 BO 3 additive showed higher density by filling the voids of Li 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3 . As the result of the low electronic conductivity of Li 3 BO 3 , the overpotential was increased. However, the electron leakage was suppressed. On the other hand, the operation voltage and the reversible capacity were improved due to the high lithium-ionic conductivity of Li 3 BO 3 . It was found that Li 3 BO 3 additive is useful for the improvement of the single-phase battery.

Original languageEnglish
Pages (from-to)18-21
Number of pages4
JournalJournal of the Ceramic Society of Japan
DOIs
Publication statusPublished - Jan 2019

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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