Affiliation:
1. School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150001 China
2. Space Environment Simulation Research Infrastructure Harbin Institute of Technology Harbin 150006 China
Abstract
AbstractThe Li dendrite problem triggered by the inhomogeneous deposition of Li and the reduction of Li+ in the electrolyte has seriously hindered the practical application of garnet‐based solid‐state batteries. To address this issue, a multifunctional double layer (MDL) based on the phenomenon of segregation during welding is introduced between the garnet and the Li anode. BiLi3/LiCl3 interlayer with a double‐layer structure is constructed by modulating the cooling rate. The LiCl3 enriched on the electrolyte side exhibits extremely low electronic conductivity, effectively blocking electrons and preventing electrolyte attack. On the anode side, the BiLi3‐enriched layer regulates local current distribution, ensuring uniform deposition/exfoliation of Li and preventing dendrite formation at the interface. Furthermore, this welding‐based preparation method achieves a strong and secure connection between the metal electrode and the ceramic electrolyte. Hence, this Li|LLZTO‐MDL|Li battery with double‐layer special structural interfacial modification can realize a high critical current density of 2.9 mA cm−2 and can be stably cycled for more than 10 000 h at 0.3 mA cm−2.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Heilongjiang Province
Cited by
2 articles.
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