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

作者：Takeuchi Tomonari^*; Kageyama Hiroyuki; Nakanishi Koji; Ohta Toshiaki; Sakuda Atsushi; Sakai Tetsuo; Kobayashi Hironori; Sakaebe Hikari; Tatsumi Kuniaki; Ogumi Zempachi

来源：Solid State Ionics, 2014, 262: 138-142.

DOI：10.1016/j.ssi.2013.09.046

• Graphite-solid electrolyte composite anode
• Ail-solid-state battery
• Lithium sulfide cathode
• Spark-plasma-sintering

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)-Li2S for graphite-SE/Li2S and In/Li2S cells, respectively), due mainly to its higher average voltage. The graphite-SE/Li2S 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.

• 出版日期2014-9-1