Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 9, Issue 6, Pages 3353-3359Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta10215f
Keywords
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Funding
- Applied and Practical LiB Development for Automobile and Multiple Application (Post-LiEAD) from the New Energy and Industrial Technology Department Organization (NEDO) in Japan
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Research on solid-state batteries with LLZ materials, the formation of a core-shell structure through Sr doping effectively suppressed the chemical reaction during high-temperature sintering, improving battery capacity.
Solid-state batteries (SSBs) that use a lithium ion, conducting garnet-type oxide electrolyte, Li7La3Zr2O12 (LLZ), are currently gaining a lot of attention. As they are very safe and reliable, these batteries can be used in a range of wireless devices and sensors as part of the future internet of things. The major issue for realizing oxide-based SSBs is the chemical reaction between the cathode and electrolyte during the ceramic fabrication process. We developed an Sr-substituted LLZ that spontaneously formed a core-shell structure that suppressed the chemical reaction during high-temperature sintering. The formation of this core-shell structure was confirmed using substitution by Sr only. A model battery using Sr-substituted LLZ significantly improved the battery capacity from similar to 10% to similar to 85% of the theoretical capacity.
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