Synthesis and electrochemical characterization of Mg-Al co-doped Li-rich Mn-based cathode materials | |
Liang, Youwei1; Li, Shiyou1,2; Xie, Jing1; Yang, Li1; Li, Wenbo1; Li, Chunlei1,2; Ai, Ling1; Fu, Xiaolan1; Cui, Xiaoling1,2; Shangguan, Xuehui3 | |
刊名 | NEW JOURNAL OF CHEMISTRY
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2019-08-14 | |
卷号 | 43期号:30页码:12004-12012 |
ISSN号 | 1144-0546 |
DOI | 10.1039/c9nj01539f |
英文摘要 | Li-rich layered oxide cathodes suffer from poor rate capability, decayed voltage and inferior cycling stability. In this work, we propose a novel synergistic strategy to improve the electrochemical performance of Li-rich Li1.2Mn0.54Ni0.13Co0.13O2 by the co-doping of magnesium and aluminium. X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) mapping, X-ray photoelectron spectroscopy (XPS) measurements and electrochemical tests have been performed for analyzing and observing the characteristics and electrochemical properties of the as-prepared materials. The co-doping of Mg and Al materials delivers a larger initial reversible capacity of 271.9 mA h g(-1), an improved cycling stability with 81.61% capacity retention after 100 cycles and an excellent rate capability of 119.8 mA h g(-1) at 5C. These significant improvements in electrochemical performances are possibly ascribed to the fact that tiny amounts of Mg and Al ions doped into the transition-metal layer help to enlarge the lithium slab spacing, leading to a reduced barrier of Li+ during the intercalation-deintercalation process and enhanced rate capability. Meanwhile, the co-doping of Mg and Al not only inhibits the formation of oxygen vacancies, but also decreases cation mixing, which hinders the undesirable phase transformation from layered to spinel-like phases during cycling. |
资助项目 | High Value Patent Conversion Implementation Project[18ZC1LA014] |
WOS研究方向 | Chemistry |
语种 | 英语 |
出版者 | ROYAL SOC CHEMISTRY |
WOS记录号 | WOS:000477966800019 |
状态 | 已发表 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.223/handle/2XXMBERH/31643] ![]() |
专题 | 石油化工学院 马克思主义学院 |
通讯作者 | Cui, Xiaoling; Shangguan, Xuehui |
作者单位 | 1.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China 2.Gansu Engn Lab Electrolyte Mat Lithium Ion Batter, Lanzhou 730050, Gansu, Peoples R China 3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810000, Qinghai, Peoples R China |
推荐引用方式 GB/T 7714 | Liang, Youwei,Li, Shiyou,Xie, Jing,et al. Synthesis and electrochemical characterization of Mg-Al co-doped Li-rich Mn-based cathode materials[J]. NEW JOURNAL OF CHEMISTRY,2019,43(30):12004-12012. |
APA | Liang, Youwei.,Li, Shiyou.,Xie, Jing.,Yang, Li.,Li, Wenbo.,...&Shangguan, Xuehui.(2019).Synthesis and electrochemical characterization of Mg-Al co-doped Li-rich Mn-based cathode materials.NEW JOURNAL OF CHEMISTRY,43(30),12004-12012. |
MLA | Liang, Youwei,et al."Synthesis and electrochemical characterization of Mg-Al co-doped Li-rich Mn-based cathode materials".NEW JOURNAL OF CHEMISTRY 43.30(2019):12004-12012. |
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