标题
作者
作者:Yu, LT (Yu, Litao)[1,2,3 ]; Liu, J (Liu, Jun)[1,2,4 ]; Xu, XJ (Xu, Xijun)[1,2,4 ]; Zhang, LG (Zhang, Liguo)[1,2,3 ]; Hu, RZ (Hu, Renzong)[1,2,4 ]; Liu, JW (Liu, Jiangwen)[1,2,4 ]; Yang, LC (Yang, Lichun)[1,2,4 ]; Zhu, M (Zhu, Min)[1,2,4 ]
期刊信息
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文献类型:Article
摘要
The MOFs (metal-organic frameworks) have been extensively used for electrode materials due to their high surface area, permanent porosity, and hollow structure, but the role of antimony on the MOFs is unclear. In this work, we design the hollow spheres Ni-MOFs with SbCl3 to synthesize NiSbCCHSs (NiSb-embedded carbon hollow spheres) via simple annealing and galvanic replacement reactions. The NiSbCCHSs inherited the advantages of Ni-MOFs with hollow structure, high surface area, and permanent porosity, and the NiSb nanoparticles are coated by the formed carbon particles which could effectively solve the problem of vigorous volume changes during the Li+ insertion/extraction process. The porous and network structure could well provide an extremely reduced pathway for fast Li+ diffusion and electron transport and provide extra free space for alleviating the structural strain. The NiSbCCHSs with these features were used as Li-ion batteries for the first time and exhibited excellent cycling performance, high specific capacity, and great rate capability. When coupled with a nanostructure LiMn2O4 cathode, the NiSbCCHSs//LiMn2O4 full cell also characterized a high voltage operation of approximate to 3.5 V, high rate capability (210 mA h g(-1) at a current density of 2000 mA g(-1)), and high Coulombic efficiency of approximate 99%, meeting the requirement for the increasing demand for improved energy devices.
关键词
作者关键词:Li-ion batteries; MOFs; hollow spheres; embedded carbon; NiSb alloy; LiMn2O4; full cells; excellent electrochemical performance
作者信息
通讯作者地址:Liu, J (通讯作者)
 | South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. |
| South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China. |
| South China Univ Technol, China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Guangdong, Peoples R China. |
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电子邮件地址:msjliu@scut.edu.cn
出版商
类别分类
研究方向:Science & Technology - Other Topics; Materials Science
Web of Science 类别:Nanoscience & Nanotechnology; Materials Science, Multidisciplinary