Advanced all-solid-state lithium-selenium batteries enabled by selenium-nitrogen doped hierarchic meso-microporous carbon nanospheres composite cathode

作     者：Chongxing Li Renbo Liu Shuxian Zhang Qingyu Li Cong Wang Zhiwei Zhang Chengxiang Wang Longwei Yin Rutao Wang Chongxing Li;Renbo Liu;Shuxian Zhang;Qingyu Li;Cong Wang;Zhiwei Zhang;Chengxiang Wang;Longwei Yin;Rutao Wang

作者机构：Key Laboratory for Liquid-Solid Structural Evolution and Processing of MaterialsMinistry of EducationSchool of Materials Science and EngineeringShandong UniversityJi’nan 250061China 

出 版 物：《中国化学快报:英文版》 (Chinese Chemical Letters)

年 卷 期：2023年第34卷第9期

页      面：289-293页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51902188,52272224) Innovation Capacity Improvement Project of Small and Medium-Sized Technology-Based Enterprise of Shandong Province(No.2021TSGC1149) Youth Innovation Team Project of Shandong Provincial Education Department(No.10000082295015) Natural Science Doctoral Foundation of Shandong Province(No.ZR2019BEM019) the Future Program for Young Scholar of Shandong University 

主　　题：L-Se battery Solid-state electrolyte Carbon nanospheres Li_(6)PS_(5)Cl Composite 

摘      要：Selenium,an element belonging to the same group in the periodic table as sulfur,has a high electronic conductivity(1×10^(-5)S/cm)and a high volumetric energy density(3253 mA h/cm^(3)),which is a prospective cathode material for high-energy all-solid-state rechargeable ***,its wide use is hindered by large volume expansion and low utilization *** this work,Se-infused nitrogen-doped hierarchical meso-microporous carbon composites(Se/NHPC)are prepared by a melt-diffusion *** Se is uniformly dispersed in meso-micropores of NHPC with a high mass loading of 81%.All-solid-state Li-Se batteries fabricated by using Se/NHPC as the cathode,a Li-In alloy as the anode,and Li_(6)PS_(5)Cl as the solid-state electrolyte,deliver a highly reversible capacity of 621 m Ah/g(92%of theoretical capacity),a good rate capability and a high capacity retention value of 80.9%after 100 *** is found that the capacity decay of Se cathode is mainly related to the interfacial degradation and the separation of Se from the carbon substrate,as suggested by the continuous increase of interfacial resistance and the structural transformation from amorphous Senchains to Se8rings initial discharge/charge cycle and then to the trigonally crystalline Se chains structure after the long-term cycles.