Application of graphite-solid electrolyte composite anode in all-solid-state lithium secondary battery with Li2S positive electrode

Tomonari Takeuchi, Hiroyuki Kageyama, Koji Nakanishi, Toshiaki Ohta, Atsushi Sakuda, Tetsuo Sakai, Hironori Kobayashi, Hikari Sakaebe, Kuniaki Tatsumi, Zempachi Ogumi

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Graphite-solid electrolyte (SE) composite anode, prepared by spark-plasma-sintering (SPS) process, was applied to all-solid-state lithium secondary batteries with lithium sulfide (Li2S) positive electrode. The electrochemical tests demonstrated that the graphite-SE/Li2S cells showed the discharge capacity of ca. 750 mAh·g - 1-Li2S with the average voltage of ca. 1.98 V. Although the discharge capacity was lower than that of the In/Li2S cells (ca. 920 mAh·g- 1-Li2S), the estimated energy density was higher than that (ca. 1490 and 1220 mWh·g- 1-Li 2S for graphite-SE/Li2S and In/Li2S cells, respectively), due mainly to its higher average voltage. The graphite-SE/Li 2S cells showed improved rate capability as compared with the cells with the graphite + SE blended powder, which was attributable mainly to the reduced interfacial resistance between the graphite and SE particles caused by the SPS process.

Original languageEnglish
Pages (from-to)138-142
Number of pages5
JournalSolid State Ionics
Volume262
DOIs
Publication statusPublished - Sep 1 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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