| 锂离子电池正极材料LiV3-xAlxO8的水热合成与性能(英文) | |
| Hydrothermal Synthesis of LiV3-xAlxO8 and Its Performance as Positive Electrode Material for Lithium-Ion Batteries | |
| 摘要: 采用水热法制备了Al掺杂的锂二次电池正极材料LiV3-xAlxO8，并用X射线衍射和扫描电镜对材料的晶体结构和形貌进行了表征。以50 mA·g-1进行恒流充放电测试，结果表明Al掺杂能够明显改善材料的电化学性能。在掺杂改性的LiV3-xAlxO8材料中，LiV2.93Al | |
| 关键词: 正极材料 水热合成 钒酸锂 掺杂 | |
| 基金项目: | |
| Abstract: Al doped lithiated vanadium oxides LiV3-xAlxO8 as promising positive electrode material for secondary lithium batteries are prepared with a hydrothermal process. The crystalline phase is characterised by powder X-ray diffraction and the morphology is observed by scanning electron microscope. The electrochemical properties of synthesized samples are investigated by galvanostatic charge and discharge at a current density of 50 mA·g-1. The electrochemical properties were greatly improved via Al doping. Among the doping modified material LiV3-xAlxO8, the maximal initial specific discharge capacity belongs to LiV2.93Al0.07O8 which can attain 325 mAh·g-1. The most excellent performance can be achieved when x=0.04. The LiV2.96Al0.04O8 material preserves a high charge -discharge efficiency of around 98% and keep a special capacity of 179 mAh·g-1 after 20 cycles. | |
| Keywords: positive electrode material hydrothermal synthesis lithium trivanadate doping | |
| 摘要点击次数: 1905 | |
| 全文下载次数: 1859 | |
| 冯季军,刘晓贞,刘祥哲,张晓梅,姜建壮,赵 静,王 敏.锂离子电池正极材料LiV3-xAlxO8的水热合成与性能(英文)[J].无机化学学报,2009,25(8):1379-1383. | |
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