Well-ordered layered LiNi0.8Co0.1Mn0.1O2 submicron sphere with fast electrochemical kinetics for cathodic lithium storage  

作　　者：Jianing Liang Yun Lu Jie Wang Xupo Liu Ke Chen Weihao Ji Ye Zhu Deli Wang 

机构地区：[1]Key laboratory of Material Chemistry for Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China [2]College of Chemistry and Pharmaceutical Sciences,Qingdao Agricultural University,Qingdao 266109,Shandong,China [3]Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong 999077,China

出　　处：《Journal of Energy Chemistry》2020年第8期188-195,I0007,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (21573083);1000 Young Talent (to Deli Wang);the Innovation Research Funds of HuaZhong University of Science and Technology (2017KFYXJJ164)。

摘　　要：Nickel-rich layered oxides have drawn sustainable attentions for lithium ion batteries owing to their higher theoretical capacities and lower cost.However,nickel-rich layered oxides also have exposed several defects for commercial application,such as uncontrollable ordered layered structure,which leads to higher energy barrier for Li+diffusion.In addition,suffering from structural mutability,the bulk nickelrich cathode materials likely trigger overall volumetric variation and intergranular cracks,thus obstructing the lithium ion diffusion path and shortening the service life of the whole device.Herein,we report wellordered layered Li Ni0.8Co0.1Mn0.1O2 submicron spheroidal particles via an optimized co-precipitation and investigated as LIBs cathodes for high-performance lithium storage.The as-fabricated Li Ni0.8Co0.1Mn0.1O2 delivers high initial capacity of 228 mAh g–1,remarkable energy density of 866 Wh kg–1,rapid Li ion diffusion coefficient(10–9cm2s–1)and low voltage decay.The remarkable electrochemical performance should be ascribed to the well-ordered layered structure and uniform submicron spheroidal particles,which enhance the structural stability and ameliorate strain relaxation via reducing the parcel size and shortening Li-ion diffusion distance.This work anticipatorily provides an inspiration to better design particle morphology for structural stability and rate capability in electrochemistry energy storage devices.

关 键 词：Lithium ion batteries Nickel-rich cathode Well-ordered layered structure Submicron spheroidal particles Electrochemical kinetics 

分 类 号：TM912[电气工程—电力电子与电力传动] O614.111[理学—无机化学]