The growth of lithium dendrites and its associated challenges pose significant obstacles to the widespread adoption of lithium metal anodes.Although numerous inorganic materials offer the potential for stabilizing lit...The growth of lithium dendrites and its associated challenges pose significant obstacles to the widespread adoption of lithium metal anodes.Although numerous inorganic materials offer the potential for stabilizing lithium metal anodes,trial-and-error experiments are time-consuming and cost-intensive.In this work,first,a high-throughput screening workflow integrated with machine learning and calculations has been used to identify possible materials,which incorporates several key indicators encompassing electronic conductivity,phase stability,mechanical properties,chemical stability,and lithium-ion transport performance.Four materials were used in experiments,and the results from both characterization and electrochemical testing show that HfO_(2)@PP exhibits the best performance,which includes having the highest Young’s modulus.Furthermore,an Li||Li symmetric cell assembled using HfO_(2)@PP operating at 1 mA cm^(−2)and 1 mA h cm^(−2)exhibited stable cycling for over 1000 h,while an Li||LFP cell assembled using HfO_(2)@PP has a capacity retention rate of more than 90%and an average coulombic efficiency of 99.7%after 200 cycles at 1 C.This work provides a design method and ideas for inorganic coating materials on separators for lithium metal anodes.展开更多
基金supported by the National Key R&D Program of China(No.2021YFB3800300)the National Natural Science Foundation of China(22309010,92372128)the Xiaomi Innovation Joint Fund of Beijing Municipal Natural Science Foundation(L223012).
文摘The growth of lithium dendrites and its associated challenges pose significant obstacles to the widespread adoption of lithium metal anodes.Although numerous inorganic materials offer the potential for stabilizing lithium metal anodes,trial-and-error experiments are time-consuming and cost-intensive.In this work,first,a high-throughput screening workflow integrated with machine learning and calculations has been used to identify possible materials,which incorporates several key indicators encompassing electronic conductivity,phase stability,mechanical properties,chemical stability,and lithium-ion transport performance.Four materials were used in experiments,and the results from both characterization and electrochemical testing show that HfO_(2)@PP exhibits the best performance,which includes having the highest Young’s modulus.Furthermore,an Li||Li symmetric cell assembled using HfO_(2)@PP operating at 1 mA cm^(−2)and 1 mA h cm^(−2)exhibited stable cycling for over 1000 h,while an Li||LFP cell assembled using HfO_(2)@PP has a capacity retention rate of more than 90%and an average coulombic efficiency of 99.7%after 200 cycles at 1 C.This work provides a design method and ideas for inorganic coating materials on separators for lithium metal anodes.
