In-situ encapsulation of core-shell structured Co@Co3O4@CNOs as anode for lithium-ion batteries with high rate performance | |
Xiao, Mingjun1; Meng, Yanshuang1,2; Zhao, Guixiang1; Sun, Huizhen1; Ke, Xinyou3; Ren, Guofeng3; Zhu, Fuliang1,2 | |
刊名 | Journal of Electroanalytical Chemistry |
2020-09-15 | |
卷号 | 873 |
关键词 | Anodes Carbon Carbonization Cobalt Ions Nanocrystalline materials Oxidation Shells (structures) Stability Electrical conductivity Electrochemical performance High-rate performance Reversible capacity Structural characterization Structural stabilities Structured materials Synergistic effect |
ISSN号 | 15726657 |
DOI | 10.1016/j.jelechem.2020.114454 |
英文摘要 | Core-shell structured material consisting of Co@Co3O4 core encapsulated in carbon nano-onions (CNOs) shell using 1-hexyl-3-methyl imidazolium dilyanamide ([HMIm]N(CN)2) as carbon source were synthesized by high-temperature carbonization and hydrogen peroxide (H2O2) oxidation. In the process of high-temperature carbonization, cobalt ions were in-situ reduced to metallic cobalt, producing core-shell structured Co@CNOs. Subsequently, Co@Co3O4@CNOs was obtained using H2O2 oxidation, in which parts of the metallic cobalt were in-situ oxidized to Co3O4, and simultaneously the carbon material was not lost. The structural characterizations indicating that the Co@Co3O4@CNOs was composed of three crystalline phases, with a higher degree of graphitization and a larger specific surface area. When applied to lithium-ion batteries anode, Co@Co3O4@CNOs showed superior reversible capacity (865 mAh g−1 after 500 cycles at 0.5C) and rate performance (403 mAh g−1 after 1500 cycles at 10C). Its superior electrochemical performance was attributed to CNOs, nitrogen doping, rich mesopores, and the synergistic effect between Co3O4 and conductive metallic cobalt, uniformly dispersed Co@Co3O4 not only have excellent structural stability but also have improved electrical conductivity and ion transfer. © 2020 Elsevier B.V. |
WOS研究方向 | Chemistry ; Electrochemistry |
语种 | 英语 |
出版者 | Elsevier B.V. |
WOS记录号 | WOS:000573824900008 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/115612] |
专题 | 材料科学与工程学院 |
作者单位 | 1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou; 730050, China 3.Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland; OH; 44106, United States; |
推荐引用方式 GB/T 7714 | Xiao, Mingjun,Meng, Yanshuang,Zhao, Guixiang,et al. In-situ encapsulation of core-shell structured Co@Co3O4@CNOs as anode for lithium-ion batteries with high rate performance[J]. Journal of Electroanalytical Chemistry,2020,873. |
APA | Xiao, Mingjun.,Meng, Yanshuang.,Zhao, Guixiang.,Sun, Huizhen.,Ke, Xinyou.,...&Zhu, Fuliang.(2020).In-situ encapsulation of core-shell structured Co@Co3O4@CNOs as anode for lithium-ion batteries with high rate performance.Journal of Electroanalytical Chemistry,873. |
MLA | Xiao, Mingjun,et al."In-situ encapsulation of core-shell structured Co@Co3O4@CNOs as anode for lithium-ion batteries with high rate performance".Journal of Electroanalytical Chemistry 873(2020). |
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