首页|Double-layered skeleton of Li alloy anchored on 3D metal foam enabling ultralong lifespan of Li anode under high rate
Double-layered skeleton of Li alloy anchored on 3D metal foam enabling ultralong lifespan of Li anode under high rate
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The high specific capacity and low negative electrochemical potential of lithium metal anodes(LMAs),may allow the energy density threshold of Li metal batteries(LMBs)to be pushed higher.However,the existing detrimental issues,such as dendritic growth and volume expansion,have hindered the practical implementation of LMBs.Introducing three-dimensional frameworks(e.g.,copper and nickel foam),have been regarded as one of the fundamental strategies to reduce the local current density,aiming to extend the Sand'time.Nevertheless,the local environment far from the skeleton is almost the same as the typical plane Li,due to macroporous space of metal foam.Herein,we built a double-layered 3D current collector of Li alloy anchored on the metal foam,with micropores interconnected macropores,via a viable thermal infiltration and cooling strategy.Due to the excellent electronic and ionic conductivity coupled with favorable lithiophilicity,the Li alloy can effectively reduce the nucleation barrier and enhance the Li+transportation rate,while the metal foam can role as the primary promotor to enlarge the surface area and buffer the dimensional variation.Synergistically,the Li composite anode with hierarchical structure of primary and secondary scaffolds realized the even deposition behavior and minimum volume expansion,outputting preeminent prolonged cycling performances under high rate.
Double-layered skeletonLi alloy3D Metal foamUltralong lifespanLithium metal batteriesHigh rate
Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313000,China
School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China
State Key Laboratory of Environmental-Friendly Energy Materials,Tianfu Institute of Research and Innovation,School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China
Huzhou Natural Science Foundation ProjectHuzhou Natural Science Foundation ProjectScience and Technology Special Program of Huzhou国家自然科学基金
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