Faradaic contributions in the supercapacitive charge storage mechanisms of manganese dioxides

被引：23

作者：

Coustan, Laura ^{[1
,2
]}

Lannelongue, Pierre ^{[1
,2
]}

Arcidiacono, Paul ^{[1
,2
]}

Favier, Frederic ^{[1
,2
]}

机构：

[1] Univ Montpellier, Inst Charles Gerhardt Montpellier UMR CNRS 5235, Campus Triolet,Cc1502, F-34095 Montpellier 05, France

[2] FR CNRS 3459, Reseau Stockage Electrochim Energie RS2E, Paris, France

来源：

ELECTROCHIMICA ACTA | 2016年 / 206卷

关键词：

manganese dioxide; cation size; electrolyte; surface capacitance; bulk capacitance; ELECTROCHEMICAL SUPERCAPACITORS; ENERGY-STORAGE; MNO2; CAPACITORS; BATTERIES; ELECTRODE; IONS;

D O I：

10.1016/j.electacta.2016.01.212

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrode materials based on four different manganese dioxides, amorphous, birnessite, crytpomelane and spinel were fabricated and their electrochemical behaviors compared in two electrolytes, Li2SO4 and (NMe4)(2)SO4. With respect to the structural characteristics of the various prepared MnO2, these electrolytes can be differentiated by their cation size. Voltammetric studies showed that these electrode materials presented distinct capacitive behaviors depending on the electrolyte used. Modeling of the electrode capacitances measured at various scan rates allowed to discriminate the surface and material bulk contributions to the overall specific capacitance of the fabricated electrodes. (c) 2016 Elsevier Ltd. All rights reserved.

引用

页码：479 / 489

页数：11

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