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ACS Appl Mater Interfaces. 2018 Jan 10;10(1):381-388. doi: 10.1021/acsami.7b11042. Epub 2017 Dec 19.

Extraordinary Porous Few-Layer Carbons of High Capacitance from Pechini Combustion of Magnesium Nitrate Gel.

Qian M1,2, Wang Y1,2, Xu F1,2, Zhao W1, Lin T1, Huang F1,3.

Author information

1
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China.
2
University of Chinese Academy of Sciences , 19 Yuquan Road, Beijing 100049, China.
3
Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.

Abstract

Highly capacitive carbons are viewed as promising commercial materials for supercapacitors, but few species satisfy the requirements of high capacitance and low cost. Here, we demonstrate an extraordinary porous few-layer carbon by facile Pechini combustion of magnesium nitrate gel, which combined salicylic acid as a complexing agent with magnesium nitrate as an inorganic metal salt. The as-synthesized carbon material delivers a capacitance of 415 F g-1, mostly stemming from a large specific surface area (∼1312 m2 g-1), a fluent channel for transport of the electrolyte, as well as electrochemical redox reactions at O,N-associated active sites. Such porous few-layer carbons may accelerate the adoption of carbon-based supercapacitors for commercial high-power energy storage applications.

KEYWORDS:

MgO; Pechini combustion; carbon; few-layer; hard template; hierarchical pore; supercapacitor

PMID:
29218981
DOI:
10.1021/acsami.7b11042

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