Characteristics of LiFePO4 synthesized from NH4FePO4-H2O via microwave processing

被引：0

作者：

Li Wei ^{[1
]}

Ying Herong ^{[1
]}

Wan Chunrong ^{[1
]}

Jiang Changyin ^{[1
]}

Tang Changping ^{[1
]}

Lei Min ^{[1
]}

机构：

[1] Tsinghua Univ, Beijing 102201, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2007年 / 36卷 / 06期

关键词：

lithium-ion battery; cathode material; NH4FePO4 center dot H2O; LiFePO4;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

LiFePO4 cathode material is synthesized by means of microwave processing. The homogeneous mixture of Li2CO3, sugar and NH4FCPO4 center dot H2O precursor synthesized from FeSO4, H3PO4 and NH3 center dot H2O was put inside the alumina crucible filled with activated carbon. The microwave irradiation to the crucible was conducted with an import power between 320 similar to 640 W for few minutes to obtain the LiFePO4 by using a domestic microwave oven of maximum power of 800 W. The NH4FePO4 center dot H2O and LiFePO4 structures are characterized by XRD and SEM. The relationships of the import power and sintering time with the structure and electrochemical performances of LiFePO4 were studied. As a result, the sample obtained under an import power of 320 W and heated for 15 min shows the best electrochemical performance. The cathode material has the initial discharge specific capacity of 156 mAh/g at 0.05 C and 115 mAh/g at 0.5 C, respectively.

引用

页码：1046 / 1050

页数：5

共 16 条

[1] The source of first-cycle capacity loss in LiFePO4 [J].