文献类型：期刊文献

英文题名：Exposed Surface Engineering of High-voltage LiNi05Co0.2Mn0.3O2 Cathode Materials Enables High-rate and Durable Li-ion Batteries

作者：Jiang, Qianqian[1,2];Yu, Haifeng[1,2];Hu, Yanjie[1,2];Jiang, Hao[1,2];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

年份：2019

卷号：58

期号：51

起止页码：23099

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20200408072597);WOS:【SCI-EXPANDED(收录号:WOS:000505632500041)】；

基金：This work was supported by the National Natural Science Foundation of China (91534202, 51672082, and 91834301), the Basic Research Program of Shanghai (17JC1402300), the Shanghai Scientific and Technological Innovation Project (18JC1410500), the National Program for Support of Top Notch Young Professionals, and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：Cathodes - Lithium compounds - Nickel compounds - Manganese compounds - Electrolytes - Sodium compounds - Temperature - Lithium-ion batteries

摘要：Engineering the exposed surface of primary particles is a viable strategy to enhance the charging rate and structural stability of high-voltage LiN0.5C0.2M0.3O2 (NCM) cathode materials. Herein, we have developed highly conductive Na2MoO4 and engineered the exposed surface of NCM by a simple infiltration and subsequent low-temperature melting process. Such an ingenious strategy can achieve a high-quality and uniform coating layer for effectively decreasing the side effects between electrode materials and the electrolyte with a rapid electron transfer pathway network. Consequently, the as-obtained NCM-NMO delivers improved reversible capacities of 202.5 mAh g(-1) at 0.2C and 129.0 mAh g(-1) at 10C in 3.0-4.5 V, which is much higher than the unmodified NCM (86.1 mAh g(-1)@10C). After 100 cycles at 1C, 91% reversible capacity is retained with a negligible voltage plateau and structural change. This finding demonstrates a novel concept to modify the primary particles of cathode materials by engineering their exposed surface.