Conversion of hydroxide into carbon-coated phosphide using plasma for sodium ion batteries

作     者：Jin Liang Guoyin Zhu Yizhou Zhang Hanfeng Liang Wei Huang Jin Liang;Guoyin Zhu;Yizhou Zhang;Hanfeng Liang;Wei Huang

作者机构：Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)Nanjing 211800China College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Chemistry and Materials ScienceInstitute of Advanced Materials and Flexible Electronics(IAMFE)Nanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第3期

页      面：2023-2029页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(Nos.21805136 and 22001081) the Startup Foundation for Introducing Talent of NUIST(Nos.1521622101002 and 1521622101003) the open research fund of State Key Laboratory of Organic Electronics and Information Displays 

主　　题：porous anodes Ni2P plasma conversion phosphorus-rich sodium ion batteries 

摘      要：Transition metal phosphides(TMPs)are promising candidates for sodium ion battery anode materials because of their high theoretical capacity and earth *** to many other P-based conversion type electrodes,TMPs suffer from large volumetric expansion upon cycling and thus quick performance ***,TMPs are easily oxidized in air,resulting in a surface phosphate layer that not only decreases the electric conductivity but also hinders the Na ion *** this work,we present a general electrode design that overcomes these two major challenges facing *** metal hydroxide and glucose as precursors,we show that the metal hydroxide can be converted into phosphide whereas the glucose simultaneously decomposes and forms carbon shell on the phosphide particles under a plasma ***2P@C core shell structures as a proof-of-concept are designed and *** in situ formed carbon shell protects the Ni2P from ***,the high-energy plasma introduces porosity and vacancies to the Ni2P and more importantly produces phosphorus-rich nickel phosphides(NiPx).As a result,the Ni2P@C electrodes achieve high sodium capacity(693 mAh·g^(−1) after 50 cycles at 100 mA·g^(−1))and excellent cyclability(steady capacity maintained for at least 1,500 cycles).Our work provides a general strategy for enhancing the sodium storage performance of TMPs,and in general many other conversion type electrode materials that are unstable in air and suffer from large volumetric changes upon cycling.