| High-rate capability of spinel LiNi0.05Mn1.95O4 cathode for Li-ion batteries prepared via coprecipitated precursor |
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| 作者姓名： | 孙斌 申国培 胡燕龙 |
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| 作者单位： | [1]College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China [2]Guangzhou Hongsen Material Co. Ltd., Guangzhou 510760, China |
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| 摘 要： | Spinel LiNi0.05Mn1.95O4 cathode material for lithium ion batteries was synthesized by solid-state reaction from coprecipitated Ni-Mn hydroxide precursors and characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and galvanostatic charge-discharge tests. It is found that LiNi0.05Mn1.95O4 powder has an ordered cubic spinel phase （space group Fd3m） and exhibits superior rate capability. After 450 cycles, the LiNi0.05Mn1.95O4/carbonaceous mesophase spheres（CMS） Li-ion batteries can retain 96.0% and 93.3% capacity at 5C and 10C charge/discharge rate, respectively, compared with 85.3% （5C） and 80.5% （10C） retention for LiMn204 batteries. However, the initial discharge capacity of LiNi0.05Mn1.95O4/CMS batteries at 1C charge/discharge rate （96.20 mA.h/g） is slightly lower than that of the LiMn2O4 batteries （100.98 mA.h/g） due to the increased average oxidation state of Mn inLiNi0.05Mn1.95O4.
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| 关 键 词： | 锂离子电池 阴极材料 共沉淀法 尖晶石型结构 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
High-rate capability of spinel LiNi0.05Mn1.95O4 cathode for Li-ion batteries prepared via coprecipitated precursor |
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| SUN Bin, SHEN Guo-pei, HU Yan-long.High-rate capability of spinel LiNi0.05Mn1.95O4 cathode for Li-ion batteries prepared via coprecipitated precursor[J].Transactions of Nonferrous Metals Society of China,2007,17(A02):937-940. |
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| Authors: | SUN Bin SHEN Guo-pei HU Yan-long |
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| Abstract: | |
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| Keywords: | Li-ion battery rate capability Ni-doped Mn spinel coprecipitation |
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