文献类型：期刊文献

英文题名：Boosting Electrochemical Performance of Lithium-Rich Manganese-Based Cathode Materials through a Dual Modification Strategy with Defect Designing and Interface Engineering

作者：Li, Zhi[1];Cao, Shuang[1];Xie, Xin[1];Wu, Chao[1];Li, Heng[1];Chang, Baobao[2];Chen, Gairong[3];Guo, Xiaowei[3];Zhang, Xiaoyan[1];Wang, Xianyou[1]

第一作者：Li, Zhi

通讯作者：Zhang, XY[1];Wang, XY[1]

机构：[1]Xiangtan Univ, Sch Chem,Natl Base Int Sci & Technol Cooperat, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Xiangtan 411105, Peoples R China;[2]Zhengzhou Univ, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou 450001, Henan, Peoples R China;[3]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Xiangtan Univ, Sch Chem,Natl Base Int Sci & Technol Cooperat, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Xiangtan 411105, Peoples R China

通讯机构：[1]corresponding author), Xiangtan Univ, Sch Chem,Natl Base Int Sci & Technol Cooperat, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Xiangtan 411105, Peoples R China.

年份：2021

卷号：13

期号：45

起止页码：53974-53985

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20214611177781);Scopus(收录号：2-s2.0-85119066456);WOS:【SCI-EXPANDED(收录号:WOS:000752873200005)】；

基金：This work was supported financially by the National Natural Science Foundation of China (No. U19A2018), the Key Project of Strategic New Industry of Hunan Province (No. 2019GK2032), and the Postgraduate Scientific Research Innovation Project of Hunan Province. The authors would like to thank Shiyanjia Lab (www.shiyanjia.com) for the TEM and AFM tests.

语种：英文

外文关键词：lithium-rich manganese-based cathode materials; dual modification; defect design; interface engineering; encapsulation of fast ion conductor

摘要：Low Coulombic efficiency, severe capacity fading and voltage attenuation, and poor rate performance are currently great obstacles for the industrial application of lithium-rich manganese-based cathode materials (LRMCs) in lithium-ion batteries (LIBs). Herein, a dual modification strategy combining defect designing with interface engineering is reported to solve the above problems synchronously. Oxygen vacancies, a carbon nitride protective layer, and a fast ion conductor are simultaneously introduced in the LRMCs. It has been found that oxygen vacancies can suppress the release of irreversible oxygen, which is in favor of improving the initial Coulombic efficiency, the carbon nitride protective layer can improve the structural stability and alleviate the attenuation of capacity and voltage, and the fast ion conductor can promote the diffusion rate of Li+ and electron conductivity and thus enhance the rate capability. The modified material exhibits significantly enhanced electrochemical performances, including a favorable capacity retention rate of 94.2% over 120 cycles at 1C (1C = 200 mAh g(-1)) and excellent rate capabilities of 173.1 and 136.9 mAh g(-1) can be maintained at 5 and 10C after 100 cycles, respectively. Hence, the well-designed dual modification strategy with defect design and interface engineering provides significant exploration for the development and industrialization of LRMCs with high performance.