Phenothiazine-MXene Aqueous Asymmetric Pseudocapacitors

被引：42

作者：

Boota, Muhammad ^{[1
,2
]}

Becuwe, Matthieu ^{[3
,4
,5
]}

Gogotsi, Yury ^{[1
,2
]}

机构：

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

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

[3] UPJV, UMR CNRS 7314, LRCS, F-80039 Amiens, France

[4] Univ Picardie Jules Verne, CNRS FR3085, ICP, F-80039 Amiens, France

[5] FR CNRS 3459, RS2E, F-80039 Amiens, France

来源：

ACS APPLIED ENERGY MATERIALS | 2020年 / 3卷 / 04期

关键词：

MXene; titanium carbide; supercapacitor; redox-active organic molecule; phenothiazine; pseudocapacitors; ELECTROCHEMISTRY; POLYMERIZATION; ELECTRODES; DENSITY; RAMAN;

D O I：

10.1021/acsaem.9b02404

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report here a molecular phenothiazine-based electrode as a high capacitance and long cycle life (77% retention after 80 000 cycles) pseudocapacitive organic material after hydrothermal deposition on reduced graphene oxide (rGO). Given the high stability of phenothiazine coated rGO hybrid electrodes under positive potentials, pseudocapacitive asymmetric supercapacitors were manufactured using two-dimensional titanium carbide (Ti3C2Tx) MXene as the negative electrode, which allowed expansion of the voltage window up to 1.4 V in 3 M H2SO4. The optimized asymmetric pseudocapacitors showed capacitance retention of over 80% after 30 000 cycles at 100 mV/s, which is one of the highest for aqueous asymmetric supercapacitors.

引用

页码：3144 / 3149

页数：6

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