RT Journal Article
SR Electronic
T1 A reversible oxygen redox reaction in bulk-type all-solid-state batteries
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaax7236
DO 10.1126/sciadv.aax7236
VO 6
IS 25
A1 Nagao, Kenji
A1 Nagata, Yuka
A1 Sakuda, Atsushi
A1 Hayashi, Akitoshi
A1 Deguchi, Minako
A1 Hotehama, Chie
A1 Tsukasaki, Hirofumi
A1 Mori, Shigeo
A1 Orikasa, Yuki
A1 Yamamoto, Kentaro
A1 Uchimoto, Yoshiharu
A1 Tatsumisago, Masahiro
YR 2020
UL http://advances.sciencemag.org/content/6/25/eaax7236.abstract
AB An all-solid-state lithium battery using inorganic solid electrolytes requires safety assurance and improved energy density, both of which are issues in large-scale applications of lithium-ion batteries. Utilization of high-capacity lithium-excess electrode materials is effective for the further increase in energy density. However, they have never been applied to all-solid-state batteries. Operational difficulty of all-solid-state batteries using them generally lies in the construction of the electrode-electrolyte interface. By the amorphization of Li2RuO3 as a lithium-excess model material with Li2SO4, here, we have first demonstrated a reversible oxygen redox reaction in all-solid-state batteries. Amorphous nature of the Li2RuO3-Li2SO4 matrix enables inclusion of active material with high conductivity and ductility for achieving favorable interfaces with charge transfer capabilities, leading to the stable operation of all-solid-state batteries.