Citation: DONG Jing, ZHONG Ben-He, ZHONG Yan-Jun, TANG Yan, LIU Heng, GUO Xiao-Dong. EDTA-Assisted Hydrothermal Synthesis for Rod-Like LiFePO₄ with Enhanced Electrochemical Properties[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(10): 2257-2264. doi: 10.3969/j.issn.1001-4861.2013.00.333 shu

EDTA-Assisted Hydrothermal Synthesis for Rod-Like LiFePO₄ with Enhanced Electrochemical Properties

1.
1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;

Received Date: 21 March 2013
Available Online: 17 May 2013
Fund Project: 四川大学青年基金(No.2011SCU11081) (No.2011SCU11081)教育部高校博士学科点科研基金(No.20120181120103)资助项目 (No.20120181120103)

Rod-like LiFePO₄ was synthesized by hydrothermal method using ethylene diamine tetraacetic acid (EDTA) as complexing agent to control the growth of the crystal. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge test. The results show that EDTAhas great influence on the morphology and electrochemical performance. The crystal morphology develops from irregular particles to rod-like particles and the thickness of the particles decreases from 140～200 nm to 40～90 nm by adding EDTAand the obtained LiFePO₄/Cwith EDTAexhibits a homogenous carbon coating layer with a thickness of ～3.5 nm. The discharge capacity is 167 mAh·g^-1 (close to the theoretical capacity of 170 mAh·g^-1) at 0.1C. The CVand EISresults indicate the samples prepared with EDTAhave a lower polarization and lower interfacial resistance.
- materials science; hydrothermal synthesis; voltammetry; lithium ion batteries; lithium iron phosphate; ethylene diamine tetraacetic acid
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

EDTA-Assisted Hydrothermal Synthesis for Rod-Like LiFePO4 with Enhanced Electrochemical Properties

References

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通讯作者: 陈斌, bchen63@163.com

EDTA-Assisted Hydrothermal Synthesis for Rod-Like LiFePO₄ with Enhanced Electrochemical Properties