Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 40, Pages 44754-44761Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c12962
Keywords
solid-state electrolyte; solid-state battery; LAGP; plastic crystal electrolyte; three-dimensional host structure
Funding
- Ministry of Science and Technology of Taiwan [MOST 109-2113-M-002-020-MY3, MOST 109-2112-M-003-011, MOST 1072113-M-002-008-MY3, MOST 106-2112-M-003-007-MY3]
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan
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The marriage between a Li metal anode and the solid-state electrolyte is expected to limit the safety risk of secondary batteries. However, dendrites and interfacial stability hinder the combination of Li metal anode and solid-state electrolyte. Herein, a plastic crystal electrolyte (PCE) and three-dimensional (3D) host structure played the role of a matchmaker in combining the solid-state electrolyte and Li metal anode. Succinonitrile cooperated with Li salt and Li6.4La3Zr1.4Ta0.6O12 nanosize powder and built a PCE interphase, which enhanced the interfacial stability between Li1.5Al0.5Ge1.5(PO4)(3) and Li metal anode. To protect the soft PCE from the dendrite penetration, commercially sold Super P, carbon nanotube, KS6, and Ketjen black were co-heated with the melted Li metal. However, only KS6 built a 3D host in Li metal successfully because of its high graphitization and layered structure. Benefitting from the matchmakers, the solid-state batteries exhibited enhanced cycling stability.
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