Abstract
Li/garnet/LiFePO4 solid-state battery was fabricated. The cathode contains LiFePO4, Ketjen black, poly(vinylidene fluoride):LiTFSI polymer as active material, electric conductor and Li-ion conducting binder, respectively. Polyvinylpyrrolidone was added into the cathode to improve cathode/electrolyte interfacial performance. When combined with polyvinylpyrrolidone additive, poly(vinylidene fluoride):polyvinylpyrrol idone:LiTFSI blend forms, and the cathode/electrolyte interfacial resistance reduces from 10.7 kΩ to 3.2 kΩ. The Li/garnet/LiFePO4 solid-state battery shows 80% capacity retention after 100 cycles at 30 °C and 0.05 C. This study offers a general strategy to improve cathode/electrolyte interfacial performance and may enable the practical application of solid-state Li-metal batteries.
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Funded by the National Natural Science Foundation of China (Nos. 51772314, 51532002, 51771222 and 51702346), and the Natural Science Foundation of Shanghai City (17ZR1434600)
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Sun, J., Li, Y. & Guo, X. Enhanced Cathode/Electrolyte Interface in Solid-state Li-metal Battery based on Garnet-type Electrolyte. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 37, 149–154 (2022). https://doi.org/10.1007/s11595-022-2511-5
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DOI: https://doi.org/10.1007/s11595-022-2511-5