模板法合成介孔锂离子电池正极材料LiFePO_4(英文)

Template-directed Synthesis of Mesoporous LiFePO_4 for Lithium-ion Batteries

以表面活性剂为模板通过自组主装的方式合成了介孔的锂离子电池正极材料LiFePO_4。采用XRD、SEM、BET和电化学测试对材料的结构、形貌、比表面积和电化学性能进行表征。介孔LiFePO_4的平均粒度在200～300 nm,首次放电比容量可达133.2 mAh/g。介孔LiFePO_4的电化学性能与非孔结构的LiFePO_4相比有很大提高。

The novel synthesis of mesoporous LiFePO_4 using surfactant as template by self-assembly method is reported in this paper. The crystal structure,apparent morphology and electrochemical performance of synthesized materials were characterized with XRD, SEM,Brunauer-Emmett-Teller(BET),and charge-discharge test.Results show that average size of the primary particles of mesoporous LiFePO_4 is about 200～300 nm,the initial special capacity is 133.2 mAh/g,and its electrochemical performances are better than the sample without porous structure.