Enhancing cyclic performance of lithium-rich manganese-based cathode via in-situ co-doping of magnesium and fluorine. (1st January 2023)

• Record Type: Journal Article
• Authors: Guo, Zhihao; Li, Lin; Su, Zihao; Peng, Gongchang; Qu, Meizhen; Fu, Yuanxiang; Wang, Hao; Ge, Wujie
• Is Part Of: Electrochimica acta. Volume 437(2023)
• Publication Date: 2023-01-01
• Subjects: Lithium-rich manganese-based cathode material -- Magnesium and fluoride co-doping -- In-situ co-precipitation -- Cycle performance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2022.141525
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Lithium-rich manganese-based materials (LRM) are regarded as promising next-generation commercial cathodes due to their exceptionally high capacities and working voltages. However, lithium-rich manganese-based materials are plagued with inferior cyclic stability and voltage fading, which greatly stifled their commercial transitions. In this work, the dopant F and Mg uniformly distributed lithium-rich manganese-based cathode material is firstly prepared via an in-situ co-precipitation and high-temperature calcination method. The F and Mg co-doped sample can demonstrate excellent cyclic stability (88.56%, after 100 cycles at 1 C), and higher initial discharge and coulombic efficiency by reducing the transition metal (TM) loss and structure stabilization. Thus, this work presents crucial findings in the development of lithium-rich manganese-based materials, which provides a novel doping route and a vital method of cation-anion co-doping to prepare high-performing cathodes. Graphical abstract: Image, graphical abstract