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Rare earth and transitional metal colloidal supercapacitors

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Abstract

The search of electrode materials with high electrochemical activity is one of key solutions to actualize both high energy density and high power density in a supercapacitor. Recently, we have developed one novel kind of rare earth and transitional metal colloidal supercapacitors, which can deliver higher specific capacitance than electrical double-layer capacitors (EDLC) and traditional pseudocapacitors. The electrode materials in colloidal supercapacitors arin colloidal supercapacitors aree in-situ formed electroactive colloids, which were transformed from commercial rare earth and transitional metal salts in alkaline electrolyte by chemical and electrochemical assisted coprecipitation. In these colloidal supercapacitors, multiple-electron Faradaic redox reactions can be utilized, which can deliver ultrahigh specific capacitance often larger than one-electron capacitance. Multiple-valence metal cations used in our designed colloidal supercapacitors mainly include Ce3+, Yb3+, Er3+, Fe3+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Sn2+ and Sn4+. The colloidal supercapacitors can be served as the promising next-generation high performance supercapacitors.

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Authors and Affiliations

  1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    KunFeng Chen & DongFeng Xue

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  1. KunFeng Chen
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  2. DongFeng Xue
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Correspondence to DongFeng Xue.

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Chen, K., Xue, D. Rare earth and transitional metal colloidal supercapacitors. Sci. China Technol. Sci. 58, 1768–1778 (2015). https://doi.org/10.1007/s11431-015-5915-z

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  • DOI: https://doi.org/10.1007/s11431-015-5915-z

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