Growth mechanisms for spherical Ni_(0.815)Co_(0.15)Al_(0.035)(OH)_(2) precursors prepared via the ammonia complexation precipitation method

作     者：Xi Yang Xuesong Huang Hancheng Shi Peng Dong Ding Wang Jianguo Duan Yingjie Zhang Xi Yang;Xuesong Huang;Hancheng Shi;Peng Dong;Ding Wang;Jianguo Duan;Yingjie Zhang

作者机构：Nationl and Localfoint Enginering Laboratory for lithium-ion Batteres and Materials Ppreparation TechmologyKey Laboratory of Advanced Batrery Materas of Yunnan ProvinceFaculty of Metalturgical and Energy EngineeringKunming University of Science and TechnologyKurnming 650093YunnanChina 

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

年 卷 期：2021年第30卷第2期

页      面：379-386,I0013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：financial support from the National Natural Science Foundation of China (No. 51904135, 51804149, 51764029) the Scientific Research Fundation of Yunnan Provincial Department of Education (No. 2019J0032) the Applied Basic Research Fundation of Yunnan Province (No. 2019FB076, 2018FD039) the Scientific Research Fund of High-end Talents Introduction of Kunming University of Science and Technology (No. KKKP201752022)。 

主　　题：Lithium ion batteries Growth mechanism Spherical agglomerates Mixed hydroxide LiNi_(0.815)Co_(0.15)Al_(0.035)O_(2) 

摘      要：The microstructures of precursors strongly affect the electrochemical performance of Ni-rich layerstructured cathode materials.In this study,the growth behaviour of Ni_(0.815)Co_(0.15)Al_(0.035)(OH)_2(NCA) prepared via the ammonia complexation precipitation method in a 50-L-volume continuously stirred tank reactor(CSTR) is studied in detail.The growth of Ni(OH)2-based hydroxide can be divided into a nucleation process,an agglomeration growth process,a process in which multiple growth mechanisms coexist,and an interface growth process over time,while the inner structure of the CSTR can be divided into a nucleation zone,a complex dissolution zone,a growth zone,and a maturation zone.The concentration of ammonium ions affects the growth habit of the primary crystal significantly due to its specific adsorption on the electronegative crystal plane.When the ammonia concentration is 2.0 mol L^(-1).The LiNi_(0.815)Co_(0.15)Al_(0.035)O_2 materials inherit the grain structure of the precursor.Materials prepared from precursors with(1 0 1)preferential primary particles show a higher specific capacity and better rate performance than those that were prepared from(0 0 1) preferential primary particles,but the latter realize a better cycling performance than the former.