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Updated: Aug 5, 2026
Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018
Improving the Cycling Stability of Li Anode in All-Solid-State Lithium Batteries with Li-Ga Anodic Interlayer
Jie Lu1, Guoyong Xue1, Chenji Hu1
1School of Chemistry and Chemical Engineering, In Situ Center for Physical Sciences, Shanghai Electrochemical Energy Device Research Center (SEED), State Key Laboratory of Metal Matrix Composites, and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
Abstract:
The commercialization of Li metal anodes in all-solid-state lithium batteries (ASSLBs) is hindered by uncontrollable dendritic growth and nonuniform deposition during cycling. Here, we report a facile metal displacement strategy to construct a Li-Ga alloy anodic interlayer to suppress Li dendrite growth and stabilize the anode-solid-state electrolyte interface. The significantly enhanced performance originates from the dramatically improved Li diffusion kinetics, with the Li-Ga alloy modified Li (Li-Ga@Li) anode exhibiting a Li atomic diffusion coefficient twice as high as that of pristine Li metal. Consequently, the Li-Ga@Li|LPSCl|Li-Ga@Li symmetric cells deliver stable lithium stripping/plating behavior over 800 h with minimal polarization and a significantly increased critical current density. When paired with a high-loading LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode active material, Li-Ga@Li|LPSCl|NCM811 ASSLBs demonstrate enhanced rate capability and prolonged cycling stability. This work provides a practical interfacial engineering strategy through diffusivity improvement toward high-performance ASSLBs.
