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
	2022-03
发表期刊	Materials Today Sustainability
ISSN	2589-2347
卷号	17
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
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
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Green & Sustainable Science & Technology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000754681400007
出版者	Elsevier Ltd
EI入藏号	20220611584832
EI主题词	Single crystals
EI分类号	542.2 Magnesium and Alloys ; 543.2 Manganese and Alloys ; 549.2 Alkaline Earth Metals ; 933.1 Crystalline Solids
来源库	WOS
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/157901
专题	电气工程与信息工程学院
通讯作者	Li, S.
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Technol, Lanzhou 730050, Peoples R China; 2.Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Peoples R China; 3.Gansu Engn Lab Cathode Mat Lithium Ion Battery, Baiyin 730900, Peoples R China; 4.Qinghai Nationalities Univ, Coll Chem & Chem Engn, Xining 810007, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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).