Grain size regulation for balancing cycle performance and rate capability of LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2) single crystal nickel-rich cathode materials

作     者：Jiapei Wang Xibin Lu Yingchao Zhang Jiahui Zhou Jiexi Wang Shengming Xu Jiapei Wang;Xibin Lu;Yingchao Zhang;Jiahui Zhou;Jiexi Wang;Shengming Xu

作者机构：Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China Hunan ShanShanEnergy Technology Co.LTDChangsha 410006HunanChina State Key Laboratory for Powder Metallurgy&School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China Beijing Key Lab of Fine CeramicsTsinghua UniversityBeijing 100084China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第2期

页      面：681-687页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science of China (Grant Nos. 51834008, 51874360) the National Key Research and Development Program of China (Grant No. 2018YFC1902205)。 

主　　题：Single crystal LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2) Spray pyrolysis Lithium nitrate Lithium-ion batteries 

摘      要：It is challenging to balance the cyclability and rate capability of single crystal nickel-rich cathode materials(Ni0.8).Multicomponent oxides by spray pyrolysis shows potential as highly-reactive precursors to synthesize single crystal nickel-rich cathode at lower temperature,yet Ni^(2+)will severely inhibit particle growth when Ni content exceeds 0.9.Herein,lithium nitrate(LiNO_(3))with low melting point and strong oxidation is introduced as collaborate lithium salts for fabrication of well-dispersed submicron and micron single crystal LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2)(NCM90)cathode without extra unit operation.By changing amount of LiNO_(3),particle size regulation is realized and cation disorder can be diminished.The as-prepared material with optimal content of 4 wt%LiNO_(3)(NCM90-4 LN)displays the most appropriate particle size(1μm)with approximately stoichiometric structure,and presents better kinetics characterization of lithium-ion diffusion(15%higher than NCM90)and good electrochemical performance with specific discharge capacity of 220.6 and 173.8 mAh g^(-1) at 0.1 C and 10 C at room temperature,respectively.This work broadens the conventional research methodology of size regulation for single crystal Ni-rich cathode materials and is indispensable for the development of designing principal of nickel-rich cathode materials for lithium-ion batteries.