Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets

被引：70

作者：

Chiam, S. L. ^{[1
]}

Lim, H. N. ^{[1
,2
]}

Hafiz, S. M. ^{[2
]}

Pandikumar, A. ^{[3
]}

Huang, N. M. ^{[4
]}

机构：

[1] Univ Putra Malaysia, Fac Sci, Dept Chem, Serdang 43400, Selangor, Malaysia

[2] Univ Putra Malaysia, Inst Adv Technol, Mat Synth & Characterizat Lab, Serdang 43400, Selangor, Malaysia

[3] CSIR, Cent Electrochem Res Inst, Electrochem Mat Sci & Funct Mat Div, Karaikkudi 630003, Tamil Nadu, India

[4] Univ Xiamen Malaysia, New Energy Sci & Engn Programme, Jalan SunSuria, Sepang 43900, Selangor Darul, Malaysia

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

关键词：

FLEXIBLE SUPERCAPACITOR; OXIDE; CO3O4; NANOSTRUCTURES; COMPOSITES;

D O I：

10.1038/s41598-018-21572-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The energy density of conventional supercapacitors is in the range of 6-10 Wh kg(-1), which has restricted them from many applications that require devices with long durations. Herein, we report a method for enhancing the energy density of a device through the parallel stacking of five copper foils coated on each side with graphene nanoplatelets. Microporous papers immersed in 2 M aqueous sodium sulphate were used as separators. With a low contact resistance of 0.05 Omega, the supercapacitor yielded an optimum specific energy density and a specific power density of 24.64 Wh kg(-1) and 402 W kg(-1) at 0.8 V, respectively. The working potential was increased to 2.4 V when three of the supercapacitors were connected in series, forming a tandem device. Its potential for real applications was manifested by the ability to light up a light-emitting diode for 40 s after charging for 60 s.

引用

页数：7

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