Facile preparation of hierarchical micro-nano FeF3·0.33H2O by a one-pot method with dual surfactants

Chaozhi Zeng; Fengling Chen; Qing Ye; Qiang Guo; Chaobo Li; Chun Huang

doi:10.1088/1361-6528/abd6d0

Facile preparation of hierarchical micro-nano FeF₃·0.33H₂O by a one-pot method with dual surfactants

Nanotechnology. 2021 Apr 9;32(15):155402. doi: 10.1088/1361-6528/abd6d0.

Authors

Chaozhi Zeng^{1

2}, Fengling Chen^{3

4}, Qing Ye⁵, Qiang Guo¹, Chaobo Li⁴, Chun Huang²

Affiliations

¹ School of Materials Science and Engineering, Shanghai University, Shanghai 200444, People's Republic of China.
² Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China.
³ University of Chinese Academy of Sciences, Beijing 100029, People's Republic of China.
⁴ Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, People's Republic of China.
⁵ Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China.

PMID: 33361561
DOI: 10.1088/1361-6528/abd6d0

Abstract

To prepare a hierarchical micro-nano structure FeF₃·0.33H₂O simply and economically, a one-pot method with dual surfactants was used. Scanning electron microscopy and a Fourier transformation infrared spectrometer revealed that polyvinyl pyrrolidone (PVP) regulates the morphology of the material, while cetyltrimethylammonium bromide (CTAB) can reshape FF@PVP, it can not only remove PVP at room temperature, but also obtain a hierarchical micro-nano structure. The electrochemical results show that the hierarchical micro-nano structure FF(1.5CTAB 0.5PVP) has the best electrochemical performance. It maintained a high specific capacity of 109.4 mAh g^-1 after 100 cycles at 1 C. In particular, under the ultra-high rate discharge of 20 C, the ultra-high specific discharge capacity of 66.4 mAh g^-1 was reached. The FF(1.5CTAB 0.5PVP)'s excellent electrochemical performance is mainly due to a large contact area between the electrolyte and active materials.