首页|(163026)Facile and efficient synthesis of binary FeOOH/Fe_2O_3 composite as a high-performance anode material for lithium-ion batteries
(163026)Facile and efficient synthesis of binary FeOOH/Fe_2O_3 composite as a high-performance anode material for lithium-ion batteries
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NSTL
Elsevier
Compared with single-component electrode materials, multi-component composite materials are more capable to promote the electrochemical performance of electrode materials because of the synergistic effect of different components. In this work, a binary FeOOH/Fe_2O_3 composite is fabricated by a facile and low-cost hydrothermal method with FeCl_3*6 H_2O and C0(NH_2)_2 as raw materials. The microstructure and composition of the as-prepared sample is characterized by XRD, SEM, TEM, FT-IR, and XPS. The electrochemical performance of the binary FeOOH/Fe_2O_3 composite is investigated by CV, EIS, charge-discharge test, and GITT measurement. Compared to single-component FeOOH or Fe_2O_3, this binary FeOOH/Fe_2O_3 composite exhibits outstanding high-rate capability (645 mA h g~(-1) at 1 A g~(-1)) and superior long-term cycling stability (779 mA h g~(-1) after 300 cycles at 0.5 A g~(-1)) due to the synergetic effect between FeOOH and Fe_2O_3. EIS analysis reveals that the electrochemical reaction resistance in binary FeOOH/Fe_2O_3 composite is lower than that in single-component FeOOH or Fe_2O_3. CV analysis demonstrates that the binary FeOOH/Fe_2O_3 composite has a certain pseudocapacitive behavior during discharge and charge processes. The lithium ion diffusion coefficient of the binary FeOOH/Fe_2O_3 composite derived from GITT data ranges from 4.0 ×10~(-12) to 1.0 × 10~(-14) cm~2 s~(-1). Ex-situ SEM observations revealed that the binary FeOOH/Fe_2O_3 composite has good structural integrity upon cycling, which partially accounts for the superior electrochemical performance of the electrode. The reported method could provide a facile avenue for the ingredient design of high-performance anode materials for next-generation lithium-ion batteries (LIBs).
Guangxi Key laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, PR China
NSTL
Elsevier
