Spherical FeF3·0.33H2O/MWCNTs nanocomposite with mesoporous structure as cathode material of sodium ion battery

Shuangying Wei; Xianyou Wang; Min Liu; Rui Zhang; Gang Wang; Hai Hu

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Spherical FeF3·0.33H2O/MWCNTs nanocomposite with mesoporous structure as cathode material of sodium ion battery

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cqvip:FeF_3·0.33H_2O crystallizes in hexagonal tungsten bronze structure with more opened hexagonal cavities are considered as next generation electrode materials of both lithium ion battery and sodium ion battery.In this paper the mesoporous spherical FeF_3·0.33H_2O/MWCNTs nanocomposite was successfully synthesized via a one-step solvothermal approach. Galvanostatic measurement showed that the performances of sodium ion batteries(SIBs) using FeF_3·0.33H_2O/MWCNTs as cathode material were highly dependent on the morphology and size of the as-prepared materials. Benefitting from the special mesoporous structure features, FeF_3·0.33H_2O/MWCNTs nanocomposite exhibits much better electrochemical performances in terms of initial discharge capacity(350.4 mAh g^(-1)) and cycle performance(123.5 mAh g^(-1) after 50 cycles at 0.1 C range from 1.0 V to 4.0 V) as well as rate capacity(123.8 mAh g^(-1) after 25 cycles back to 0.1 C). The excellent electrochemical performance enhancement can be attributed to the synergistic effect of the mesoporous structure and the MWCNTs conductive network, which can effectively increase the contact area between the active materials and the electrolyte, shorten the Na^+ diffusion pathway,buffer the volume change during cycling/discharge process and improve the structure stability of the FeF_3·0.33H_2O/MWCNTs nanocomposite.

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《能源化学：英文版》 |2018年第2期|P.573-581|共9页
作者
Shuangying Wei; Xianyou Wang; Min Liu; Rui Zhang; Gang Wang; Hai Hu;
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作者单位

National Bose for International Science ＆ Technology Cooperation;

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;

Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion;

School of Chemistry;

Xiangton University;

Xiangtan 411105;

Hunan;

China;

National Bose for International Science ＆ Technology Cooperation;

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;

Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion;

School of Chemistry;

Xiangton University;

Xiangtan 411105;

Hunan;

China;

National Bose for International Science ＆ Technology Cooperation;

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;

Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion;

School of Chemistry;

Xiangton University;

Xiangtan 411105;

Hunan;

China;

National Bose for International Science ＆ Technology Cooperation;

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;

Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion;

School of Chemistry;

Xiangton University;

Xiangtan 411105;

Hunan;

China;

National Bose for International Science ＆ Technology Cooperation;

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;

Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion;

School of Chemistry;

Xiangton University;

Xiangtan 411105;

Hunan;

China;

National Bose for International Science ＆ Technology Cooperation;

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;

Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion;

School of Chemistry;

Xiangton University;

Xiangtan 411105;

Hunan;

China;

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原文格式 PDF
正文语种 CHI
中图分类化学电源、电池、燃料电池;
关键词
结构稳定性; 钠离子电池; 阴极材料; 球形; 电气化学; 性能改进; 锂离子电池; mAh;

机译：结构稳定性;钠离子电池;阴极材料;球形;电气化学;性能改进;锂离子电池;mAh;

Spherical FeF3·0.33H2O/MWCNTs nanocomposite with mesoporous structure as cathode material of sodium ion battery

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