LiZr_(2)(PO_(4))_(3)surface coating towards stable layer structure Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)cathode materials with long cycle performance
作者机构：College of Chemistry and Chemical EngineeringChongqing University of TechnologyChongqing 400054China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第2期
页 面：2373-2382页
核心收录：
学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：support from the Key Project of Science and Technology Research of Chongqing Education Commission of China(No.KJZDK201801103) the Venture&Innovation Support Program for Chongqing Overseas Returnees(No.cx2019128) Scientific Research Foundation of Chongqing University of Technology(No.2022ZDZ004).
主 题：Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2) LiZr_(2)(PO_(4))_(3) layered structure cycle life high temperature
摘 要：Li-rich manganese-based materials are considered to be the mainstream cathode materials for next-generation lithium-ion batteries due to high discharge capacity and low cost,but poor cycle life and high temperature performance limit their development.Herein,LiZr_(2)(PO_(4))_(3)(LZPO)is coated on the surface of spherical Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)(LMNCO)material by a simple wet chemical method.The LZPO layer not only has the function of traditional coating layer to inhibit the occurrence of side reactions between electrolyte and LMNCO surface but also promotes the formation of spinel phase in the layered structure,increases the content of lattice oxygen,and reduces the content of absorbed oxygen.Thus,LZPO coated LMNCO has a more stable layered structure during cycling compared pure LMNCO,which improves effectively its long life and high temperature performance.The capacity loss rate of LZPO coated LMNCO is only 16.2%and 11.9%after 350 cycles at 25℃and 200 cycles at 50℃,respectively.Moreover,the capacity retention rate of the full cell composed of LZPO coated LMNCO and graphite is 70.7%after 200 cycles at 1.0 C.The coating layer toward stable surface structure can provide an idea for the modification of cathode materials,especially for Li-rich manganese-based materials.
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