Li3V2(PO4)3 cathode material synthesized by chemical reduction and lithiation method
Li3V2(PO4)3 cathode material synthesized by chemical reduction and lithiation method
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DOI：
10.1016/j.jpowsour.2008.12.044
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发表时间：
2009-04
影响因子：
9.2
通讯作者：
Jun‐chao Zheng;Xinhai Li;Zhixing Wang;Huajun Guo;Hu Qiyang;W. Peng
中科院分区：
文献类型：
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作者：
Jun‐chao Zheng;Xinhai Li;Zhixing Wang;Huajun Guo;Hu Qiyang;W. Peng
以草酸为还原剂，碳酸锂为锂源，将V2 O 5化学还原锂化得到的无定形Li 3V 2（PO 4）3在乙醇溶液中煅烧，合成了单斜晶系Li 3V 2（PO 4）3正极材料。采用TG-DSC和XPS对非晶态Li 3V 2（PO 4）3前驱体进行表征。结果表明，在常温常压下，草酸可将V5+还原为V3+。采用XRD和SEM对合成的Li 3V 2（PO 4）3进行了表征。结果表明，合成的Li 3V 2（PO 4）3粉体具有良好的结晶性和介孔形貌，平均粒径约为30 nm。纯的Li 3V 2（PO 4）3在0.1C下表现出130.08mAhg− 1（14 mAg −1）的稳定放电容量。
The monoclinic-type Li3V2(PO4)3cathode material was synthesized via calcining amorphous Li3V2(PO4)3obtained by chemical reduction and lithiation of V2O5using oxalic acid as reducer and lithium carbonate as lithium source in alcohol solution. The amorphous Li3V2(PO4)3precursor was characterized by using TG–DSC and XPS. The results showed that the V5+was reduced to V3+by oxalic acid at ambient temperature and pressure. The prepared Li3V2(PO4)3was characterized by XRD and SEM. The results indicated the Li3V2(PO4)3powder had good crystallinity and mesoporous morphology with an average diameter of about 30nm. The pure Li3V2(PO4)3exhibits a stable discharge capacity of 130.08mAhg−1at 0.1C (14mAg−1).