| 碳热还原法制备LiFePO4/C粉体及其电化学性能 |
| Electrochemical Performance of LiFePO4/C Cathode Materials Synthesized by Carbon Thermal Reduction |
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| DOI：10.16253/j.cnki.37-1226/tq.2017.01.002 |
| 中文关键词: 葡萄糖用量 磷酸铁锂 碳热还原法 电化学性能 |
| 英文关键词:Glucose content Lithium iron phosphate Carbon thermal reduction Electrochemical performance |
| 基金项目: |
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| 中文摘要: |
| 以FePO4为铁源、Li2CO3为锂源、葡萄糖为碳源和还原剂，采用碳热还原法合成了LiFePO4/C粉体。采用热重-差热 (TG-DSC)，X射线衍射 (XRD)，循环伏安 (CV) 及恒电流充放电测试等分析方法研究不同葡萄糖用量 (7 wt%、10 wt%、12 wt%、14 wt%、17 wt%) 对LiFePO4/C粉体的结构及电化学性能影响。结果表明，葡萄糖用量为12 wt% 的粉体具有最佳的电化学性能，首次放电比容量为150 mAh/g，经30次循环后放电比容量仍有152.2 mAh/g，容量保持率为101.5%。 |
| 英文摘要: |
| LiFePO4/C materials were prepared with different glucose contents by carbon thermal reduction method，using FePO4 as iron source and Li2CO3 as lithium source. The structure, morphology and electrochemical performance of the samples were characterized by thermogravimetry-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), cyclic voltammetry (CV) and charge-discharge test. The results demonstrate that when the glucose content was 12 wt%, as-prepared LiFePO4/C showed the best electrochemical performances. The initial discharge capacity was 150 mAh/g at 0.1 C, and after 30 cycles, the discharge capacity was 152.2 mAh/g, capacity retention rate being 101.5%. |
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