| 磷酸钒锂溶胶-凝胶制备及电化学性能研究 |
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| 引用本文： | 刘丽英,陈炼,张海燕,翟玉春. 磷酸钒锂溶胶-凝胶制备及电化学性能研究[J]. 电化学, 2010, 16(4): 450. DOI: 10.61558/2993-074X.2070 |
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| 作者姓名： | 刘丽英 陈炼 张海燕 翟玉春 |
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| 作者单位： | 广东工业大学材料与能源学院,广东广州518006;迈科科技有限公司,广东东莞523800;东北大学材料与冶金学院,辽宁沈阳,110004;广东工业大学材料与能源学院,广东广州,518006 |
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| 基金项目： | 广东省高校优秀青年创新人才培育项目;广东省高校优秀青年创新人才培育项目 |
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| 摘 要： | 以柠檬酸为螯合剂和碳源,应用溶胶-凝胶法制备锂离子电池正极Li3V2(PO4)3/C.XRD、SEM及恒电流充放电等测试表明,所得样品经800℃、12 h焙烧后具有单一晶相结构,粒度相对较小,分布均匀.0.1C、0.5C和1C放电首次比容量分别为153.0、143.1和130.6 mAh.g-1,50次循环容量效率分别为93.1%,85.4%和77.3%,充电效率达80%,放电电压较高.
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| 关 键 词： | 磷酸钒锂 正极材料 锂离子电池 溶胶-凝胶法 |
| 收稿时间： | 2010-11-28 |
The Sol-gel Synthesis and Electrochemical Performance of Li_3V_2(PO_4)_3/C Cathode Material for Lithium Ion Battery |
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| Abstract: | Li3V2(PO4)3/C was synthesized by sol-gel method with citric acid as chelate and C sources.Physical and electrochemical performances of as-prepared materials were characterized through XRD,SEM and galvanostatic charge-discharge tests,etc.The results showed that products produced by calcining at 800 ℃ for 12 h had a single phase crystal structure and relatively small particle sizes with uniform distribution.At 0.1 C,0.5 C and 1 C,the initial specific discharge capacities were 153.0,143.1 and 130.6 mAh·g-1,respectively,and capacity efficiencies were 93.1%,85.4% and 77.3% after 50 cycles,respectively.Charge efficiencies were all above 80% and discharge voltages were higher. |
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| Keywords: | Li-ion batteries cathode material Li3V2(PO4)3 sol-gel |
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