Citation: Yan Jingjing, Zhu Dazhang, Lv Yaokang, Xiong Wei, Liu Mingxian, Gan Lihua. Water-in-salt electrolyte ion-matched N/O codoped porous carbons for high-performance supercapacitors[J]. Chinese Chemical Letters, ;2020, 31(2): 579-582. doi: 10.1016/j.cclet.2019.05.035 shu

Water-in-salt electrolyte ion-matched N/O codoped porous carbons for high-performance supercapacitors

Yan Jingjing ^a ,
Zhu Dazhang ^a ,
Lv Yaokang ^b ,
Xiong Wei ^c ,
Liu Mingxian ^a,d,*, ,
Gan Lihua ^a,*,

a.
Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China
b.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
c.
Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
d.
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China

liumx@tongji.edu.cn

ganlh@tongji.edu.cn

Received Date: 11 April 2019
Revised Date: 7 May 2019
Accepted Date: 20 May 2019
Available Online: 20 May 2019

Figures(4)

Pore size and distribution in carbon-based materials are regarded to be a key factor to affect the electrochemical capacitive performances of the resultant electrodes. In this study, nitrogen and oxygen codoped porous carbons (NOPCs) are fabricated based on a simple Schiff-base reaction between m-phenylenediamine and terephthalaldehyde. The NOPCs have tunable morphologies, high surface areas, abundant heteroatom doping. More importantly, the carbons show a dominant micropores of 0.5-0.8 nm, comparable to the ionic sizes of LiTFSI (Li⁺ 0.069 nm; TFSI-0.79 nm) water-in-salt electrolyte with a high potential window of 2.2 V. Consequently, the fabricated symmetric supercapacitor gives a high energy output of 30.5 Wh/kg at 1 kW/kg, and high stability after successive 10, 000 cycles with ~96.8% retention. This study provides promising potential to develop high-energy supercapacitors.
- N/O Codoped Porous carbon,
- Water-in-salt electrolyte,
- Pore/ion size matching,
- Symmetrical supercapacitor,
- High energy density
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