High capacitance of surface-modified 2D titanium carbide in acidic electrolyte

被引：462

作者：

Dall'Agnese, Yohan ^{[1
,2
,3
,4
]}

Lukatskaya, Maria R. ^{[3
,4
]}

Cook, Kevin M. ^{[3
,4
]}

Taberna, Pierre-Louis ^{[1
,2
]}

Gogotsi, Yury ^{[3
,4
]}

Simon, Patrice ^{[1
,2
]}

机构：

[1] Univ Toulouse 3, CNRS, CIRIMAT UMR 5085, F-31062 Toulouse, France

[2] FR CNRS 3459, RS2E, Paris, France

[3] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[4] Drexel Univ, AJ Drexel Nanomat Inst, Philadelphia, PA 19104 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2014年 / 48卷

基金：

欧洲研究理事会;

关键词：

Electrochemical capacitors; Two-dimensional materials; XPS; Surface chemistry; ANODE; BEHAVIOR; CARBON; MXENE; TI3C2; OXIDE; RUO2;

D O I：

10.1016/j.elecom.2014.09.002

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behavior of Ti3C2, a two-dimensional titanium carbide from the MXene family, in H2SO4 electrolyte is reported. To demonstrate the effect of surface chemistry on capacitive performance, Ti3C2 was modified by delamination or intercalation treatments. Electrochemical testing revealed an increase in capacitance, which was attributed to oxygen-containing functional groups. An extraordinary high intercalation capacitance of 415 F.cm(-3) at 5 A.g(-1) was obtained from electrodes with a specific surface area of just 98 m(2).g(-1). Values up to 520 F.cm(-3) were recorded for delaminated MXene films at 2 mV.s(-1). This study highlights that the behavior of materials from the large family of two-dimensional MXene can be tuned by suitable modification of their surface chemistry. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：118 / 122

页数：5

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