Rapid and reversible Na deposition onto Al nanosheet arrays  

作　　者：Fang Tang Rongqing Xia Dong Chen Yu Yao Lin Liu Yuezhan Feng Xianhong Rui Yan Yu 

机构地区：[1]School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China [2]Hefei National Research Center for Physical Sciences at the Microscale,Department of Materials Science and Engineering,National Synchrotron Radiation Laboratory,CAS Key Laboratory of Materials for Energy Conversion,University of Science and Technology of China,Hefei 230026,Anhui,China [3]Key Laboratory of Materials Processing and Mold(Ministry of Education),Zhengzhou University,Zhengzhou 450002,Henan,China

出　　处：《Journal of Energy Chemistry》2022年第11期1-7,I0002,共8页能源化学（英文版）

基　　金：the National Natural ScienceFoundation of China(Grant Nos.51925207,U1910210,52161145101,51872277,51972067,51902062and 52002083);the Fundamental Research Funds for the Central Universities(WK2060140026);the National Synchrotron Radiation Laboratory(KY2060000173);the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(Grant.YLU-DNL Fund 2021002);Guangdong Natural Science Funds for Distinguished Young Scholar(GrantNo.2019B151502039).

摘　　要：Sodium metal battery(SMB)is regarded as a promising candidate for next-generation high-energy battery due to high theoretical capacity and abundant natural resources.However,the growth of sodium dendrites and large volume expansion during the processes of sodium plating and stripping seriously restrict the practical application of SMBs.Here,a three-dimensional skeleton of aluminum nanosheet arrays(Al NSARs)is constructed by a facile etching approach to achieve rapid and reversible Na plating/stripping.The Al NSARs with large geometric specific surface and plentiful cavities can provide rich active nucleation sites,reduce local current density and accommodate Na volume change,which lead to uniform deposition of sodium with dendrite-free morphology.As a result,Na plating/stripping on Al NSARs can stably operate over 650 cycles at 2 mA cm^(-2)/2 mAh cm^(-2)with average Coulombic efficiency(CE)of 100.0%and low potential polarization of 27 mV.Moreover,the full cell of Na_(s)V_(2)(PO_(4))_(3)||Al NSARs@Na can run for over 1800 cycles at a high rate of 20C.These superior properties,combined with relatively low cost and weight of Al,enable our AlNSARs to begreat prospect for practical applications.

关 键 词：Sodiummetal battery Sodiummetal anode Three-dimensional skeleton Al nanosheet arrays Dendrite-freebehavior 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]