| 锂离子电池正极材料Li_3V_2(PO_4)_3的掺杂 | |
| 杨改 ; 应皆荣 ; 姜长印 ; 高剑 ; 万春荣 ; YANG Gai ; YING Jierong ; JIANG Changyin ; GAO Jian ; WAN Chunrong | |
| 2010-06-04 ; 2010-06-04 | |
| 关键词 | 锂离子电池 正极材料 Li3V2(PO4)3 掺杂 lithium ion batteries cathode Li3V2(PO4)3 substitution TM912 |
| 其他题名 | Doped Li_3V_2(PO_4)_3 cathode materials for Li-ion batteries |
| 中文摘要 | 为了降低磷酸钒锂(Li3V2(PO4)3)材料成本并提高材料中活性元素V的利用率,该文采用溶胶凝胶/碳热还原法合成了球形锂离子电池正极材料Li3V2(PO4)3及其掺杂不同金属离子(Al3+、Cr3+、Y3+、Ti4+)的衍生物。电化学测试结果表明,经摩尔分数x=5%的金属离子掺杂修饰后的Li3V2(PO4)3材料的首次充放电容量及循环性能均优于经x=10%的金属离子掺杂的材料。其中Al3+和Ti4+的掺杂更加有效,在3.0~4.8V、0.5mA下x(Al3+,Ti4+)=5%样品的首次充电容量分别为178 mAh.g-1和174.9 mAh.g-1。80次循环后放电容量均保持在123 mAh.g-1左右。; Spherical Li3V2(PO4)3 and metal ions(Al3+,Cr3+,Y3+,Ti4+) doped Li3V2(PO4)3 particles were synthesized for lithium ion batteries using the sol-gel/carbothermal reduction method to reduce the cost and improve the vanadium utilization as the active element in Li3V2(PO4)3.Electrochemical tests show that the metal ions doped Li3V2(PO4)3 with metal ion concentrations of x=5% had higher initial charge-discharge capacities and better cycling performance than x=10%.Al3+ and Ti4+ were found to be more effective. At cut-off voltages of 3.0-4.8 V with a current of 0.5 mA,the initial charge capacities with 5% concentration of Al3+ and Ti4+ were 178 mAh � g-1 and 174.9 mAh � g-1,respectively.After 80 cycles,the reversible discharge capacities were still as high as 123 mAh � g-1.; 国家自然科学基金资助项目(50772057); 清华大学基础研究基金(JC2007044); 国家重点基础研究发展规划(2007CB209707) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/35586]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 杨改,应皆荣,姜长印,等. 锂离子电池正极材料Li_3V_2(PO_4)_3的掺杂[J],2010, 2010. |
| APA | 杨改.,应皆荣.,姜长印.,高剑.,万春荣.,...&WAN Chunrong.(2010).锂离子电池正极材料Li_3V_2(PO_4)_3的掺杂.. |
| MLA | 杨改,et al."锂离子电池正极材料Li_3V_2(PO_4)_3的掺杂".(2010). |
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