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3D Carbon Frameworks for Ultrafast Charge/Discharge Rate Supercapacitors with High Energy-Power Density

Changyu Leng Zongbin Zhao Yinzhou Song Lulu Sun Zhuangjun Fan Yongzhen Yang Xuguang Liu Xuzhen Wang Jieshan Qiu

纳微快报（英文）2021，Vol.13Issue(1)：112-122,11.

3D Carbon Frameworks for Ultrafast Charge/Discharge Rate Supercapacitors with High Energy-Power Density

3D Carbon Frameworks for Ultrafast Charge/Discharge Rate Supercapacitors with High Energy?Power Density

Changyu Leng ¹Zongbin Zhao ¹Yinzhou Song ¹Lulu Sun ¹Zhuangjun Fan ²Yongzhen Yang ³Xuguang Liu ³Xuzhen Wang ¹Jieshan Qiu¹

作者信息

1. State Key Lab of Fine Chemicals, School of Chemical Engineering, Liaoning Key Lab for Energy Materials and Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China
2. School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, Shandong, People's Republic of China
3. Key Lab of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, People's Republic of China
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摘要

Abstract

Carbon-based electric double layer capacitors (EDLCs) hold tremendous potentials due to their high-power performance and excellent cycle stability. However, the practical use of EDLCs is limited by the low energy density in aqueous electrolyte and sluggish diffusion kinetics in organic or/and ionic liquids electrolyte. Herein, 3D carbon frameworks (3DCFs) constructed by interconnected nanocages (10-20 nm) with an ultrathin wall of ca. 2 nm have been fabricated, which possess high specific surface area, hierarchical porosity and good conductive network. After deoxidization, the deoxidized 3DCF (3DCFDO) exhibits a record low IR drop of 0.064 V at 100 A g-1 and ultrafast charge/discharge rate up to 10 V s-1. The related device can be charged up to 77.4％ of its maximum capacitance in 0.65 s at 100 A g-1 in 6 M KOH. It has been found that the 3DCF-DO has a great affinity to EMIMBF4, resulting in a high specific capacitance of 174 F g-1 at 1 A g-1, and a high energy density of 34 Wh kg-1 at an ultrahigh power density of 150 kW kg-1 at 4 V after a fast charge in 1.11 s. This work provides a facile fabrication of novel 3D carbon frameworks for supercapacitors with ultrafast charge/discharge rate and high energy-power density.

关键词

3D carbon frameworks/Nanocages/Ultrafast charge/discharge rate/High energy-power density/Supercapacitors

Key words

3D carbon frameworks/Nanocages/Ultrafast charge/discharge rate/High energy-power density/Supercapacitors

引用本文复制引用

Changyu Leng,Zongbin Zhao,Yinzhou Song,Lulu Sun,Zhuangjun Fan,Yongzhen Yang,Xuguang Liu,Xuzhen Wang,Jieshan Qiu..3D Carbon Frameworks for Ultrafast Charge/Discharge Rate Supercapacitors with High Energy-Power Density[J].纳微快报（英文）,2021,13(1):112-122,11.

基金项目

The authors acknowledge the financial support from the National Natural Science Foundation of China(51672033,U1610255,U1703251). （51672033,U1610255,U1703251）

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