Biomass-derived hierarchical porous carbons: boosting the energy density of supercapacitors via an ionothermal approach

2017 ◽  
Vol 5 (25) ◽  
pp. 13009-13018 ◽  
Author(s):  
Yuchuan Liu ◽  
Baobing Huang ◽  
Xiaoxiao Lin ◽  
Zailai Xie
Keyword(s):  
Energy Density ◽  
High Power ◽  
Electrical Double Layer ◽  
High Mass ◽  
High Power Density ◽  
Mass Energy ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Electrical Double Layer Capacitors ◽  
Double Layer Capacitors

High mass energy density coupled with high power density is highly desired for electrical double-layer capacitors.

scholarly journals Hierarchical Carbon Microtube@Nanotube Core–Shell Structure for High-Performance Oxygen Electrocatalysis and Zn–Air Battery

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenfu Xie ◽  
Jianming Li ◽  
Yuke Song ◽  
Shijin Li ◽  
Jianbo Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Mass ◽  
Core Shell ◽  
High Power Density ◽  
Mass Loading

AbstractZinc–air batteries (ZABs) hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness. However, the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading. Herein, we report a hierarchical electrocatalyst based on carbon microtube@nanotube core–shell nanostructure (CMT@CNT), which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V. Remarkably, when being employed as air–cathode in ZAB, the CMT@CNT presents an excellent performance with a high power density (160.6 mW cm−2), specific capacity (781.7 mAhg Zn −1 ) as well as long cycle stability (117 h, 351 cycles). Moreover, the ZAB performance of CMT@CNT is maintained well even under high mass loading (3 mg cm−2, three times as much as traditional usage), which could afford high power density and energy density for advanced electronic equipment. We believe that this work is promising for the rational design of hierarchical structured electrocatalysts for advanced metal-air batteries.

Nanospace-confined synthesis of oriented porous carbon nanosheets for high-performance electrical double layer capacitors

2016 ◽  
Vol 4 (43) ◽  
pp. 16879-16885 ◽  
Author(s):  
Ya Wang ◽  
Hui Dou ◽  
Bing Ding ◽  
Jie Wang ◽  
Zhi Chang ◽  
...  
Keyword(s):  
Energy Density ◽  
Porous Carbon ◽  
Electrical Double Layer ◽  
High Performance ◽  
Three Dimensional ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Nanosheets ◽  
Electrical Double Layer Capacitors ◽  
Double Layer Capacitors

A symmetric capacitor based on facilely synthesized three-dimensional oriented porous carbon nanosheets delivers high energy density.

scholarly journals Hierarchical porous carbon derived from carboxylated coal-tar pitch for electrical double-layer capacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 29131-29140 ◽  
Author(s):  
Haiyang Wang ◽  
Hongzhe Zhu ◽  
Yixuan Li ◽  
Debang Qi ◽  
Shoukai Wang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Porous Carbon ◽  
Electrical Double Layer ◽  
Coal Tar ◽  
Electrochemical Stability ◽  
Coal Tar Pitch ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Electrical Double Layer Capacitors ◽  
Double Layer Capacitors

The specific capacitance of the HPC-2 electrode retention of 93.9% was obtained after 10 000 cycles, indicating good electrochemical stability.

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