A Polyanionic,Quasi-zero-strain and Open-framework K_(0.76)V_(0.55)Nb_(0.45)OPO_(4) for Sodium-ion Batteries

作     者：LIU Jian-Dong-Yong YU Xu BAO Jing-Ze LIN Ying-Xi 刘鉴冬涌;余旭;包敬泽;林迎曦

作者机构：C45 Key Laboratory of Design and Assembly of Functional Nanostructuresand Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of ChemistryFuzhou UniversityFuzhou 350108China 

出 版 物：《Chinese Journal of Structural Chemistry》 (结构化学（英文）)

年 卷 期：2021年第40卷第12期

页      面：1631-1638,1553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] 

基　　金：This project was supported by the National Natural Science Foundation of China(No.21771180) 

主　　题：anode material sodium-ion batteries high structural stability solid solution reaction 

摘      要：A carbon-coated K_(0.76)V_(0.55)Nb_(0.45)OPO_(4)(KVNP@C)polyanion material was successfully synthesized by a simple sol-gel *** KVNP@C possesses a highly stable inorganic open-framework structure,which is hard to be affected by the Na^(+) intercalation/deintercalation when used as an anode material for sodium-ion batteries(NIBs).The assembled KVNP@C/Na half-cell shows a capacity retention of 81.2%and an average Coulombic efficiency of 99.8%at a current density of 300 mA/g after 1500 ***-situ XRD analysis reveals a single-phase solid solution reaction mechanism with a lattice expansion of 4.76%.This work sheds insights into the quest for developing novel polyanion-based anode materials for sodium-ion batteries.