Citation: HUANG Fu-Qin, TANG Xin-Cun, XIAO Yuan-Hua, GONG Mei-Li, ZHENG Zhen-Miao, JIN Yuan. Synthesis and Electrochemical Properties of LiFePO4 Hierarchically Nest-Like Microstructures[J]. Chinese Journal of Inorganic Chemistry, ;2014, (2): 235-241. doi: 10.11862/CJIC.2014.051
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The cathode material LiFePO4 with tap density of ca. 1.2 g·cm-3 was synthesized by solvothermal method, using P123 as soft template and ethylene glycol as solvent. The composition, crystal shape, morphology and pore structure of the as-prepared samples were characterized by X-ray diffraction(XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM), Brunauer-Emmett-Teller (BET). The results show that the nest-like LiFePO4 consists of single-crystalline nanoplates with an open three-dimensional porous hierarchical structure. A reasonable formation mechanism is proposed based on time dependent experiments. The main evolving process involves the following steps: nucleation, oriented growth, aggregation and oriented growth. The electrochemical testing results show that the initial discharge specific capacities of nest-like LiFePO4 reach to 132.5 mAh·g-1 at 0.1C.
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