期刊
CHEMICAL ENGINEERING JOURNAL
卷 433, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133777
关键词
Potassium ion battery; Anode; Prussian blue; Electrochemical property
资金
- National Natural Science Foundation of China (NSFC) [61701434]
- Natural Science Foundation of Shan-dong Province [ZR2020KF008]
In this study, a unique molten salt-assisted carbothermal strategy was proposed to fabricate carbon-encapsulated Prussian blue material. The material was characterized and tested for its potential as an anode material for potassium-ion storage.
In this work, a unique molten salt-assisted carbothermal strategy was proposed to fabricate carbon-encapsulated Prussian blue material. In this strategy, Fe/C composite was firstly synthesized by employing molten sodium chloride as a floating template that carried iron nuclei through the holes in the carbon matrix, and thereafter ensured uniform growth and distribution of iron crystals. Then this Fe/C intermediate was transformed into carbon-encapsulated Prussian blue material via its impregnation into potassium hexacyanoferrate solution. Since this strategy was not unique to the system demonstrated, it should provide general guidance as to the fabrication of carbon-encapsulated Prussian blue analogs. The carbon-encapsulated Prussian blue material was characterized by XRD, Raman, TG, DSC, XPS, XANES, SEM, TEM and HRTEM measurements. Also, it was tested as a potential anode material for potassium-ion storage both in half and full cells through galvanostatic test, rate performance test, cyclic voltammetry and electrochemical impedance spectroscopy.
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