Graphene quantum dots-induced morphological changes in CuCo2S4 nanocomposites for supercapacitor electrodes with enhanced performance

被引：47

作者：

Huang, Yuanyuan ^{[1
,2
,3
]}

Lin, Liwei ^{[2
,3
]}

Shi, Tielin ^{[1
]}

Cheng, Siyi ^{[1
,2
,3
]}

Zhong, Yan ^{[1
]}

Chen, Chen ^{[1
]}

Tang, Zirong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Hubei, Peoples R China

[2] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

[3] Berkeley Sensor & Actuator, Berkeley, CA 94720 USA

来源：

APPLIED SURFACE SCIENCE | 2019年 / 463卷

基金：

美国国家科学基金会;

关键词：

GQDs; CuCo2S4; Supercapacitors; Morphology change; Electrodes; ARRAYS; COMPOSITE; GROWTH;

D O I：

10.1016/j.apsusc.2018.08.247

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：

Graphene quantum dots (GQDs) have been explored in recent years for electrochemical applications with considerable potentials. Here, we present GQD-doped CuCo2S4 nanocomposites through two-step hydrothermal process for supercapacitor electrodes. The surface of CuCo2S4 nanosheets changes from smooth to particles-accumulative shape, which assists the electrochemical cycling processes as well as the ion diffusion and charge transfer kinetics for improved supercapacitor performances. As a result, GQD/CuCo2S4 electrodes demonstrate a specific capacitance of 1725 F g(-1) under a current density of 0.5 A g(-1) and a cycling life of 10,000 cycles by retaining 90% of the energy storage capability. As such, this work extends the potential of GQDs in electrochemical applications by means of morphology change of CuCo2S4 nanosheets.

引用

页码：498 / 503

页数：6

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