Hydrothermal synthesis of ultra-thin LiFePO4 platelets for Li-ion batteries
Hydrothermal synthesis of ultra-thin LiFePO4 platelets for Li-ion batteries
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DOI：
10.1007/s10853-011-5403-1
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发表时间：
2011-02
影响因子：
4.5
通讯作者：
H. Xiang;Dawei Zhang;Yi-Chun Jin;Chun-hua Chen;Jishan Wu;Haihui Wang
中科院分区：
文献类型：
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作者：
H. Xiang;Dawei Zhang;Yi-Chun Jin;Chun-hua Chen;Jishan Wu;Haihui Wang
以四甘醇为共溶剂，采用水热法制备了超薄LiFePO 4片晶。所制备的LiFePO 4片晶具有约50-80 nm的非常薄的厚度，这有利于Li离子在电极本体中的快速转移。结果表明，合成的LiFePO 4正极材料在0.2 C时具有137 mAh g− 1的可逆容量。碳包覆后的LiFePO 4/C复合正极材料的电子电导率提高，倍率性能得到显著改善。在8和12 C下，复合材料的放电容量分别为104和95 mAh g-1，这表明超薄LiFePO 4片晶是大规模锂离子电池的有希望的候选者。
Ultra-thin LiFePO4platelets are prepared by a hydrothermal process using tetraethylene glycol as co-solvent. The prepared LiFePO4platelets have a very thin thickness of about 50–80 nm, which is beneficial for Li ions to fast transfer in the bulk of the electrode. It is found that the as-synthesized LiFePO4cathode material exhibits a quite high reversible capacity of 137 mAh g−1at 0.2 C. After carbon coating, the obtained LiFePO4/C composite cathode has the enhanced electronic conductivity, and thus the rate capability has been improved significantly. At 8 and 12 C, the composite has the discharge capacity of 104 and 95 mAh g−1, respectively, which suggests that the ultra-thin LiFePO4platelets are a promising candidate for the large-scale Li-ion batteries.