Efficient Noble‐Metal‐Free Catalysts Supported by Three‐Dimensional Ordered Hierarchical Porous Carbon

2020 ◽  
Vol 15 (16) ◽  
pp. 2513-2519
Author(s):  
Weiqiang Zhou ◽  
Wei Liang Teo ◽  
Dongdong Wang ◽  
Gancheng Zuo ◽  
Deblin Jana ◽  
...  
Keyword(s):  
Noble Metal ◽  
Porous Carbon ◽  
Three Dimensional ◽  
Hierarchical Porous Carbon ◽  
Metal Free ◽  
Hierarchical Porous

scholarly journals Digested sludge-derived three-dimensional hierarchical porous carbon for high-performance supercapacitor electrode

2018 ◽  
Vol 5 (4) ◽  
pp. 172456 ◽  
Author(s):  
Jia-Jia Zhang ◽  
Hao-Xiang Fan ◽  
Xiao-Hu Dai ◽  
Shi-Jie Yuan
Keyword(s):  
Porous Carbon ◽  
Carbon Material ◽  
High Performance ◽  
Three Dimensional ◽  
Value Added ◽  
Porous Carbon Material ◽  
Activation Process ◽  
Hierarchical Porous Carbon ◽  
Digested Sludge ◽  
Hierarchical Porous

Digested sludge, as the main by-product of the sewage sludge anaerobic digestion process, still contains considerable organic compounds. In this protocol, we report a facile method for preparing digested sludge-derived self-doped porous carbon material for high-performance supercapacitor electrodes via a sustainable pyrolysis/activation process. The obtained digested sludge-derived carbon material (HPDSC) exhibits versatile O-, N-doped hierarchical porous framework, high specific surface area (2103.6 m 2  g −1 ) and partial graphitization phase, which can facilitate ion transport, provide more storage sites for electrolyte ions and enhance the conductivity of active electrode materials. The HPDSC-based supercapacitor electrodes show favourable energy storage performance, with a specific capacitance of 245 F g −1 at 1.0 A g −1 in 0.5 M Na 2 SO 4 ; outstanding cycling stability, with 98.4% capacitance retention after 2000 cycles; and good rate performance (211 F g −1 at 11 A g −1 ). This work provides a unique self-doped three-dimensional hierarchical porous carbon material with a favourable charge storage capacity and at the same time finds a high value-added and environment-friendly strategy for disposal and recycling of digested sludge.

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