Modulating precursor nanosheets for stabilized Ni-rich cathode material for Li-ion batteries  

作　　者：He-Kang Zhu Zi-Jia Yin Yu Tang Yang Ren He Zhu Dong Luo Si Lan Li-Gao Yang Qi Liu 

机构地区：[1]Department of Physics,City University of Hong Kong,Hong Kong,999077,China [2]Shenzhen Research Institute,City University of Hong Kong,Shenzhen,518057,China [3]School of Economics,&Management,Changsha University of Science and Technology,Changsha,410114,China

出　　处：《Rare Metals》2022年第8期2552-2559,共8页稀有金属（英文版）

基　　金：financially sponsored by the National Key R&D Program of China (No.2020YFA0406203);Shenzhen Science and Technology Innovation Commission (No. JCYJ20200109105618137);Shenzhen-Hong Kong Innovation Circle Category D Project (No.SGDX2019081623240948);the ECS Scheme (No.CityU 21307019);Shenzhen Research Institute,City University of Hong Kong;resources of the Advanced Photon Source,a U.S.Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.DE-AC0206CH11357

摘　　要：Ni-rich cathodes have high capacity while low stability,searching for new methods to stabilize the structure has never stopped.Herein,Ni-rich cathodes LiNi_(0.75)-Co_(0.14)Mn_(0.11)O_(2),with high capacity and good cycling stability,were successfully obtained by reducing the size of primary particles in the precursor[Ni_(0.75)Co_(0.14)Mn_(0.11)](OH)_(2).The Ni-rich cathode,synthesized through this approach,delivers a capacity of 206 mAh·g^(-1)and retains92%and 87.7%for 150 cycles at 0.33 C and 300 cycles at1.00 C,respectively.More importantly,the optimal temperature for the final product could be lowered by 1000 C concomitant with this size control,which is conducive to save the manufacture cost and fuel for scale-up production.Static and dynamic structural investigations reveal that the modulated precursor enables the Ni-rich cathode to reach a combination of a low Li/Ni mixing ratio and nanosheet primary particles,which realizes the high capacity and high stability in the meantime.

关 键 词：stability CYCLING cathode 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ131.11[化学工程—无机化工]