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Controllable synthesis of Li3PO4 hollow nanospheres for the preparation of high performance LiFePO4 cathode material

Controllable synthesis of Li3PO4 hollow nanospheres for the preparation of high performance LiFePO4 cathode material

作     者:Jiaying Bi Tongbao Zhang Kai Wang Benhe Zhong Guangsheng Luo 

作者机构:The State Key Lab of Chemical Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 China School of Chemical Engineering Sichuan University. Chengdu 610065. China 

出 版 物:《Particuology》 (颗粒学报(英文版))

年 卷 期:2016年第14卷第1期

页      面:142-150页

核心收录:

学科分类:08[工学] 0805[工学-材料科学与工程(可授工学、理学学位)] 

基  金:the support of the National Natural Science Foundation of China 

主  题:Lithium phosphate Hollow sphere Microreactor Lithium iron phosphate 

摘      要:Lithium phosphate hollow nanospheres were prepared in a membrane dispersion microreactor using aqueous phosphoric acid and lithium hydroxide solutions as reactants. The influences of reactant flow rate ratio and temperature on the purity and morphology of the prepared nanospheres were investigated using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that nanospheres prepared in the continuous flow condition had a hollow interior structure with high crystallinity. A possible mechanism for the formation of this hollow structured Li3 PO4 was also pro- posed. Using Li3 PO4 hollow nanospheres as the precursor, LiFePO4 hollow nanospheres were successfully synthesized via a solvothermal route in ethylene glycol. After coating with carbon, the LiFePO4/C hol- low nanospheres exhibited excellent electrochemical performance, especially at high rates, and could discharge124 mAh/g at 10 C, and even 98 mAh/g at 40 C.

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