| 用不同锰源高温固相法制备LiMnPO4/C |
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| 引用本文： | 彭薇,侯贤华,张志文,胡社军.用不同锰源高温固相法制备LiMnPO4/C[J].电池,2010,40(5). |
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| 作者姓名： | 彭薇 侯贤华 张志文 胡社军 |
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| 作者单位： | 华南师范大学物理与电信工程学院,广东,广州,510006;华南师范大学物理与电信工程学院,广东,广州,510006;华南师范大学物理与电信工程学院,广东,广州,510006;华南师范大学物理与电信工程学院,广东,广州,510006 |
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| 基金项目： | 国家自然科学基金(50771046) |
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| 摘 要： | 以MnO2、Mn(Ac)2和MnCO3为锰源,通过高温固相法制备纯相LiMnPO4/C正极材料,进行XRD、SEM分析和充放电、循环伏安测试。采用不同锰源制备的样品,XRD衍射峰均与LiMnPO4的标准图谱一致,无其他杂质峰;但颗粒形貌存在较大的差别。以Mn(Ac)2为锰源的材料具有较好的循环稳定性和相对较高的可逆容量,以0.2C在2.7~4.5 V充放电,首次充、放电比容量分别为113.1 mAh/g和95.7 mAh/g,库仑效率为84.6%,第25次循环的放电比容量为108.9 mAh/g。
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| 关 键 词： | 锂离子电池 高温固相法 LiMnPO4/C 正极材料 |
Preparing LiMnPO_4/C via high temperature solid-state method with different manganese sources |
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| PENG Wei,HOU Xian-hua,ZHANG Zhi-wen,HU She-jun.Preparing LiMnPO_4/C via high temperature solid-state method with different manganese sources[J].Battery Bimonthly,2010,40(5). |
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| Authors: | PENG Wei HOU Xian-hua ZHANG Zhi-wen HU She-jun |
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| Affiliation: | PENG Wei,HOU Xian-hua,ZHANG Zhi-wen,HU She-jun(School of Physics , Telecommunication Engineering,South China Normal University,Guangzhou,Guangdong 510006,China) |
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| Abstract: | Phase-pure LiMnPO4/C cathode material was synthesized by high temperature solid-state method using MnO2,Mn(Ac)2 and MnCO3 as manganese sources,XRD,SEM analyses and charge-discharge,cyclic voltammetry tests were taken. The XRD patterns of the samples prepared by different manganese sources accorded with the standard pattern of LiMnPO4,while the surface morphology of the samples had great difference.The material with Mn(Ac)2 as manganese source had fine cycle stability and relatively high reversibility capaci... |
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| Keywords: | Li-ion battery high temperature solid-state method LiMnPO4/C cathode material |
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