| 脉冲激光沉积CrP薄膜及其电化学性能 |
| Electrochemical Properties of CrP Thin Film Electrode Fabricated by Pulsed Laser Deposition |
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| 摘要: 采用脉冲激光溅射Cr和P粉的混合靶成功制备了CrP薄膜，选区电子衍射(SAED)和光电子能谱(XPS)分析显示经过真空原位400℃退火以后，薄膜主要由多晶态的CrP组成。非原位HRTEM和SEM测试结果表明CrP薄膜在充放电前后的形貌有较大的改变。SAED、充放电和循环伏安测试证实了CrP和锂的电化学反应机理如下：CrP在Li+的驱动下，生成了Cr和Li3P。在其后的充放电过程中，发生了Li在LiP中可逆的嵌入和脱出反应。由于CrP首次容量高达1 168 mAh·g-1以及在0.7 V左右具有平稳的放电平台，显示了它可能成为一种新型的锂离子电池的负极材料。 |
| 关键词: 脉冲激光沉积 锂离子电池 CrP 薄膜 |
| 基金项目: |
| Abstract: CrP thin film has been fabricated by pulsed laser ablation of mixed target of Cr and P powder. The structural and morphological changes of the as-deposited thin film have been investigated by a combination of SEM, SAED and HRTEM methods. Moreover, the electrochemical properties of CrP have been studied by charge/discharge and cylic voltammetry measurements. The electrochemical mechanism of CrP with lithium may involve the irreversible decomposition of CrP into the metal Cr and Li3P driven by lithium ions and the subsequent reversible conversion of LiP into Li3P formed after the initial discharge. The high reversible capacity of 827 mAh·g-1 with the low flat discharge platform of 0.7 V made CrP a qualified potential candidate of electrode for rechargeable lithium batteries. |
| Keywords: pulsed laser deposition lithium-ion batteries CrP thin film |
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| 吴济今,孙 正,傅正文.脉冲激光沉积CrP薄膜及其电化学性能[J].无机化学学报,2008,24(11):1761-1766. |
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