Exploring the action mechanism of magnesium in different cations sites for LiNi0.5Mn1.5O4 cathode materials

doi:10.1016/j.mtsust.2021.100105

	Exploring the action mechanism of magnesium in different cations sites for LiNi0.5Mn1.5O4 cathode materials
	Cui, X.1,1,2,3; Zhou, X.1,2,3; Liang, W.1,2,3; Tuo, K.1,2,3; Wang, P.1,2,3; Zhang, L.4; Li, S.1,2,3
刊名	Materials Today Sustainability
	2022-03-01
卷号	17
关键词	Cathodes Doping (additives) Lithium compounds Lithium-ion batteries Magnesium Manganese Manganese compounds Nickel compounds Action mechanisms Cation sites Efficient strategy Electrochemical performance High temperature performance Li + Mg-doping Micron-sized material Rate capabilities Specific capacities
DOI	10.1016/j.mtsust.2021.100105
英文摘要	Micron-sized single-crystal LiNi0.5Mn1.5O4 (LNMO-900) cathodes suffer from poor rate capability and inferior specific capacity. Mg doping is regarded as an efficient strategy to improve the electrochemical performance of LNMO cathodes. In this work, the effect of replacing a small part of Ni or Mn with Mg are studied. Compared with LiNi0.47Mg0.03Mn1.5O4 (Mg–Ni-LNMO), the lattice parameter of LiNi0.5Mn1.47Mg0.03O4 (Mg–Mn-LNMO) is significantly increased, which provides a wider channel for the transmission of Li+. Besides, the Mg–Mn-LNMO has a higher Ni2+ and a lower Mn3+ content in the crystal lattice, which is beneficial to improve the energy density and cycling stability. Moreover, replacing Mn with Mg in LNMO effectively suppresses Jahn-Teller distortion and helps to alleviate the dissolution of transition metal elements, which improves the capacity retention, especially at high temperatures. Our research indicates that replacing a small part of Mn is more feasible to improve the cycle performance of LNMO cathodes. © 2022 Elsevier Ltd
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157901]
专题	电气工程与信息工程学院
作者单位	1.School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou; 730050, China; 3.Gansu Engineering Laboratory of Cathode Material for Lithium-ion Battery, Baiyin; 730900, China; 4.College of Chemistry and Chemical Engineering, Qinghai Nationalities University, Xining; 810007, China
推荐引用方式 GB/T 7714	Cui, X.,Zhou, X.,Liang, W.,et al. Exploring the action mechanism of magnesium in different cations sites for LiNi0.5Mn1.5O4 cathode materials[J]. Materials Today Sustainability,2022,17.
APA	Cui, X..,Zhou, X..,Liang, W..,Tuo, K..,Wang, P..,...&Li, S..(2022).Exploring the action mechanism of magnesium in different cations sites for LiNi0.5Mn1.5O4 cathode materials.Materials Today Sustainability,17.
MLA	Cui, X.,et al."Exploring the action mechanism of magnesium in different cations sites for LiNi0.5Mn1.5O4 cathode materials".Materials Today Sustainability 17(2022).