High power density aqueous hybrid supercapacitor combining activated carbon and highly conductive spinel cobalt oxide

JOURNAL OF POWER SOURCES

卷:331

Article

Godillot, G.¹  Taberna, P. -L.^2,3  Daffos, B.^2,3  Simon, P.^2,3  Delmas, C.¹  Guerlou-Demourgues, L.^1,3 

[1] Univ Bordeaux, UPR 9048, ICMCB, Bordeaux INP,CNRS, F-33600 Pessac, France

[2] Univ Toulouse, CIRIMAT, UMR 5085, 118 Route Narbonne, F-31062 Toulouse, France

[3] CNRS, FR 3459, Reseau Francais Stockage Electrochim Energie, RS2E, F-75700 Paris, France

关键词: Cobalt oxide;    Spinel;    Hybrid supercapacitor;    Electrode;   

DOI  :  10.1016/j.jpowsour.2016.09.035

来源: Elsevier

【 摘 要 】

The remarkable electrochemical behavior of complete activated carbon/cobalt oxide cells is reported in the present work. Among the various weight ratios between the positive and negative electrodes evaluated, the best features are obtained with an overcapacitive cobalt oxide electrode. The energy densities obtained by this system (20 Wh kg(-1) for a power density of 209 W kg(-1)) are twice higher than those measured for a activated carbon/activated carbon symmetric cell, in the same operating conditions. With discharge capacities around 62 F g(-1), this system is among the best ones reported in the literature for this category. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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