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Sintering Temperature Induced Evolution of Microstructures and Enhanced Electrochemical Performances: Sol-Gel Derived LiFe(MoO4)2 Microcrystals as a Promising Anode Material for Lithium-Ion Batteries.

ABSTRACT: A facile sol-gel process was used for synthesis of LiFe(MoO4)2 microcrystals. The effects of sintering temperature on the microstructures and electrochemical performances of the as-synthesized samples were systematically investigated through XRD, SEM and electrochemical performance characterization. When sintered at 650°C, the obtained LiFe(MoO4)2 microcrystals show regular shape and uniform size distribution with mean size of 1-2 ?m. At the lower temperature (600°C), the obtained LiFe(MoO4)2 microcrystals possess relative inferior crystallinity, irregular morphology and vague grain boundary. At the higher temperatures (680 and 700°C), the obtained LiFe(MoO4)2 microcrystals are larger and thicker particles. The electrochemical results demonstrate that the optimized LiFe(MoO4)2 microcrystals (650°C) can deliver a high discharge specific capacity of 925 mAh g-1 even at a current rate of 1 C (1,050 mA g-1) after 500 cycles. Our work can provide a good guidance for the controllable synthesis of other transition metal NASICON-type electrode materials.

SUBMITTER: Wang L 

PROVIDER: S-EPMC6198042 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Sintering Temperature Induced Evolution of Microstructures and Enhanced Electrochemical Performances: Sol-Gel Derived LiFe(MoO<sub>4</sub>)<sub>2</sub> Microcrystals as a Promising Anode Material for Lithium-Ion Batteries.

Wang Li L   He Yuanchuan Y   Mu Yanlin Y   Liu Mengjiao M   Chen Yuanfu Y   Zhao Yan Y   Lai Xin X   Bi Jian J   Gao Daojiang D  

Frontiers in chemistry 20181016

A facile sol-gel process was used for synthesis of LiFe(MoO<sub>4</sub>)<sub>2</sub> microcrystals. The effects of sintering temperature on the microstructures and electrochemical performances of the as-synthesized samples were systematically investigated through XRD, SEM and electrochemical performance characterization. When sintered at 650°C, the obtained LiFe(MoO<sub>4</sub>)<sub>2</sub> microcrystals show regular shape and uniform size distribution with mean size of 1-2 μm. At the lower temp  ...[more]

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