Citation: ZHANG Ling-Xiao, ZHANG Li-Juan, XILI De-Ge, LI Fan. CF_x-Ru Composite Cathode for Lithium Primary Battery with Significantly Improved Electrochemical Performance[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(1): 148-158. doi: 10.11862/CJIC.2020.005 shu

CF_x-Ru Composite Cathode for Lithium Primary Battery with Significantly Improved Electrochemical Performance

Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, School of Environmental and Energy Engineering, Center of Excellence for Environmental Safety and Biological Effects, Beijing University of Technology, Beijing 100124, China

Corresponding author: ZHANG Li-Juan, zhanglj1997@bjut.edu.cn
Received Date: 5 May 2019
Revised Date: 13 November 2019

Figures(10)

CF_x-Ru cathode materials for lithium primary batteries were synthesized by a simple in-situ chemical modification for the first time. Compared with pristine commercial CF_x, CF_x-Ru exhibited an improved capacity of 605 mAh·g^-1 and a maximum power density of 8 727 W·kg^-1 with a plateau of 2 V at 5C, which shows a promising application in the market. The structure, chemical environment and morphology were investigated by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. It is found that the ratio of F to C (n_F/n_C) and the peak area ratio of the C-F₂ bond to the C-F covalent bond in CF_x-Ru were both lowered, which is supposed to come from the reaction of RuO₂ with CF₂ inert group of CF_x materials in situ synthesis. This in-situ chemical reaction consumed inactive CF₂, produced conductive elemental ruthenium, and increased specific surface area due to gas phase product evolution. These features contribute to the excellent electrochemical performance of the modified material. The improved conductivity and larger specific surface area were further comfirmed by the results of electrochemical impedance spectroscopy and N₂ adorption-desorption measurements.
- lithium primary batteries,
- high rate performance,
- in-situ chemical modification,
- ruthenium,
- CF_x
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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

CFx-Ru Composite Cathode for Lithium Primary Battery with Significantly Improved Electrochemical Performance

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通讯作者: 陈斌, bchen63@163.com

CF_x-Ru Composite Cathode for Lithium Primary Battery with Significantly Improved Electrochemical Performance