摘要
Sodium-tellurium(Na-Te)battery,thanks to high theoretical capacity and abundant sodium source,has been envisaged as one promising battery technology,its practical application yet faces daunting challenges regarding how to mitigate the critical issues of uncontrollable dendrites growth at Na anode and polytellurides shuttling effect at Te cathode.We here report an elaborative design for fabrication of microsphere skeleton nanohybrids with three-dimensional(3D)hierarchical porous carbon loading CeO_(2)quantum dots(CeO_(2)-QDs/HPC),which feature highly favorable properties of sodiophilic and catalysis for hosting sodium and tellurium,respectively.The systematic investigations coupling with first-principle calculations demonstrate the CeO_(2)-QDs/HPC not only offers favorable structure and abundant electrocatalytic sites for facilitating interconversion between Te and NaxTe as a cathode host,but also can function as dendrite inhibitor anode host for reversible sodium electro-plating/deposition.Such Na-Te battery exhibits admiring electrochemical performance with an impressive specific capacity of 392 mAh g1,a long cycling stability over 1000 cycles,as well as remarkably high energy density of 192 Wh kg1 based on the total mass of anode and cathode.Such proof-of-concept bifunctional host design for active electrode materials can render a new insight and direction to the development of high-performance Na-Te batteries.
出处
《InfoMat》
SCIE
CAS
2022年第10期90-101,共12页
信息材料（英文）
基金
National Natural Science Foundation of China,Grant/Award Numbers:21875253,51872048,52073061
Natural Science Foundation of Fujian Province,Grant/Award Numbers:2021J01430167,2021J02020
CAS-Commonwealth Scientific and Industrial Research Organization(CSIRO)Joint Research Projects,Grant/Award Number:121835KYSB20200039
Scientific Research and Equipment Development Project of CAS,Grant/Award Number:YJKYYQ20190007
Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy,Grant/Award Number:YLU-DNL Fund 2021011。
