Increasing(010) active plane of P2-type layered cathodes with hexagonal prism towards improved sodium-storage  

作　　者：Dongmei Dai Xiaobing Lai Xiaojuan Wang Yunting Yao Mengmin Jia Liang Wang Pengyao Yan Yaru Qiao Zhuangzhuang Zhang Bao Li Dai-Huo Liu 

机构地区：[1]Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals,Key Laboratory of Green Chemical Media and Reactions(Ministry of Education),School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,China [2]CAS Henan Industrial Technology Innovation&Incubation Center,Zhengzhou 450016,China

出　　处：《Chinese Chemical Letters》2024年第10期505-509,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52372188,51902090);Henan Key Research Project Plan for Higher Education Institutions(No.23A150038);2023 Introduction of Studying Abroad Talent Program;“111”Project(No.D17007);Henan Provincial Key Scientific Research Project of Colleges and Universities(No23A150038);Key Scientific Research Project of Education Department of Henan Province(No.22A150042);the National Students’Platform for Innovation and Entrepreneurship Training Program(No.201910476010);the China Postdoctoral Science Foundation(No.2019 M652546);the Henan Province Postdoctoral StartUp Foundation(No.1901017)。

摘　　要：Na-ion cathode materials with a fast charge and discharge behavior are needed to develop future high energy sodium-ion batteries(SIBs).However,inevitably complicated phase transitions and sluggish kinet ics during insertion and removal of Na+in P_(2)-type layered transition metal oxides generate structura instability and severe capacity decay.To get rid of such a dilemma,we report a structural optimization strategy to promote P2-type layered transition metal oxides with more(010)active planes as an efficien cathode for SIBs.As a result,as-prepared hexagonal-prism P2-type layered Na_(0.71)Ni_(0.16)Li_(0.09)Co_(0.16)Mn0.6O_(2)cathode with more(010)active planes delivers a reversible capacity of 120.1 mAh/g at 0.1 C,impressive rate capability of 52.7 m Ah/g at 10 C,and long-term cycling stability(capacity retention of 95.6%ove200 cycles).The outstanding electrochemical performance benefited from the unique hexagonal-prism with more(010)active facets,which can effectively shorten the diffusion distances of Na+,increase the Na-ion migration dynamics and nanostructural stability during cycling verified by morphology character ization,Rietveld refinement,GITT,density functional theory calculations and operando XRD.

关 键 词：Layered cathodes Hexagonal-prism shape P2-type structure Sodiumion batteries Enhanced diffusion kinetics 

分 类 号：TB34[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]