| 低温固相反应合成Li3V2(PO4)3正极材料及其性能(英文) |
| Cathode Material Li3V2(PO4)3: Low Temperature Solid-state Reaction Synthesis and Performance |
|
| 摘要: 利用V2O5·nH2O湿凝胶，LiOH·H2O，NH4H2PO4和C等作原料，通过低温固相还原反应在550 ℃焙烧12 h制备出Li3V2(PO4)3正极材料。采用XRD，SEM和电化学测试对Li3V2(PO4)3样品性能进行研究。XRD研究表明本法所合成的Li3V2(PO4)3同传统的高温固相反应法所合成的Li3V2(PO4)3一样同属于单斜晶系结构。SEM测试表明所合成的样品平均粒径大小约为0.5 μm且粒径分布较窄。电化学测试表明以0.2 C的倍率放电时，样品的首次放电容量为130 mAh·g-1，室温下循环30次后其比容量为124 mAh·g-1。 |
| 关键词: 锂离子电池 正极材料 Li3V2(PO4)3 低温固相还原反应 循环伏安法 |
| 基金项目: |
| Abstract: Li3V2(PO4)3 cathode material was prepared by low temperature solid-state reaction. V2O5·nH2O hydro-gel, LiOH·H2O, NH4H2PO4 and C were used as starting materials to prepare the precursor, and Li3V2(PO4)3 was obtained by sintering the precursor at 550 ℃ for 12 h. The property of the Li3V2(PO4)3 sample was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurement. XRD studies show that the Li3V2(PO4)3 sample obtained has the same monoclinic structure as that synthesized by conventional solid-state reaction. SEM image exhibits that the particle size is about 0.5 μm with narrow size distribution. Electrochemical test shows that the initial discharge capacity of Li3V2(PO4)3 powder is 130 mAh·g-1 at the rate of 0.2 C，and the capacity retains 124 mAh·g-1 after 30 cycles at room temperature. |
| Keywords: lithium ion batteries cathode material Li3V2(PO4)3 low temperature solid-state reaction cyclic voltammetry (CV) |
| |
| 摘要点击次数: 1278 |
| 全文下载次数: 1587 |
| 钟胜奎,尹周澜,王志兴,陈启元.低温固相反应合成Li3V2(PO4)3正极材料及其性能(英文)[J].无机化学学报,2006,22(10):1843-1846. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
