Achieving thermodynamic stability of single-crystal ultrahigh-nickel cathodes via an alcohol-assisted mechanical fusion

作     者：Zhi Zhang Tiancheng Liu Ce Gao Yun Liu Hailan Kuai Hongli Du Wanli You Xiaobing Huang Jixue Shen Haitao Huang Yuefeng Su Lai Chen 

作者机构：Hunan Provincial Key Laboratory of Water Treatment Functional MaterialsCollege of Chemistry and Materials EngineeringHunan University of Arts and ScienceChangde 415000HunanChina School of Materials Science and EngineeringBeijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China College of Chemistry and Materials ScienceHebei UniversityBaoding 071002HebeiChina Department of Applied Physics and Research Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHong Kong 999077China MCC Ramu New Energy Technology Co.Ltd.Tangshan 063000HebeiChina 

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

年 卷 期：2024年第99卷第12期

页      面：580-592页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：the support from the Natural Science Foundation of Hunan Province,China(2024JJ7301) the science and technology innovation Program of Hunan Province(2024JK2097) the Project of the Scientific Research Fund of Hunan Provincial Education Department(No.22C0383) Changde Scientific and Technological Innovation Plan(CDKJJ20220517) Start-up Foundation for Doctors of Hunan University of Arts and Science(No.22BSQD22,21BSQD14 and 21BSQD15) Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province partially supported by the Research Grants Council of the Hong Kong Special Administrative Region,China(PolyU152178/20E) the Innovation and Technology Commission of Hong Kong(MHP/080/22) 

主　　题：Single-crystal LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2) LiFePO_(4)nano-particles Ultrahigh voltage Thermal stability Cycling stability 

摘      要：Elevating the operating voltage is an effective approach to improve the reversible capacity of ultra-high nickel layered oxide cathode LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM,x≥0.8)and solve therange anxietyconfusion of electric ***,the undesirable surface reconstruction induced by the high cut-off voltage has a fatal impact on the thermodynamic stability of the material,inevitably leading to fast capacity ***,a mechanical fusion aided by alcohol is suggested to create a stable olivine structure for the single-crystal(SC)ultrahigh-nickel cathode LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2).The addition of nanoparticles effectively bridges the void of SC-NCM,builds an ideal particle grading,and significantly raises the cost efficiency,as well as promotes the cycling stability and safety of the full ***,the layered/olivine mixture forms a perfect shield by lowering the surface area between the NCM cathode and electrolyte,hence mitigating side reactions and contributing to an incredibly thin and stable cathode/electrolyte ***,the thermodynamic stability of highly delithiated NCM is improved,as both the particle cracks and structural degradation are simultaneously ***,the maximum temperature of the single-crystal LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2)@LiFePO_(4)‖graphite pouch full cell is dramatically reduced from 599.4 to 351.4℃,and the full cell achieves 88.2%capacity retention after 800 cycles,demonstrating excellent thermal stability and cycling *** facile strategy provides a feasible technical reference for further exploiting the ultrahigh-capacity,highsafety,and long-life Ni-rich cathode for commercial application of lithium-ion batteries(LIBs).