Citation: LIU Dong, SHEN Jun, LI Ya-Jie, LIU Nian-Ping, LIU Bin. Pore Structures of Carbon Aerogels and Their Effects on Electrochemical Supercapacitor Performance[J]. Acta Physico-Chimica Sinica, ;2012, 28(04): 843-849. doi: 10.3866/PKU.WHXB201202172 shu

Pore Structures of Carbon Aerogels and Their Effects on Electrochemical Supercapacitor Performance

LIU Dong ¹ ,
SHEN Jun ^1, ,
LI Ya-Jie ¹ ,
LIU Nian-Ping ¹ ,
LIU Bin ²

1.
1. Shanghai Key Laboratory of Special Microstructure Materials and Technology, Tongji University, Shanghai 200092, P. R. China;
2. Institute of Aerospace Special Materials and Technology, Beijing Mailbox 7203, P. R. China

Received Date: 23 November 2011
Available Online: 17 February 2012
Fund Project: 国家自然科学基金(11074189) (11074189)上海市科委纳米专项(11nm0501600) 资助项目 (11nm0501600)

Control of the pore structures of carbon aerogels (CAs) was investigated by changing the sol-gel polymerization and activation conditions. The morphologies and physical properties of the CAs and KOH activated carbon aerogels (ACAs) were characterized by scanning electron microscopy (SEM) and N₂ adsorption isotherms. The electrochemical performances of the CAs and ACAs as electrode materials were characterized using cyclic voltammetry (CV), a galvanostatic charge-discharge test, and electrochemical impedance spectroscopy (EIS). The results showed that the well developed threedimensional nano-network structures and the reasonable pore size distributions of the CAs have great effect on their electrochemical performance in supercapacitors. Because of abundant mesopores and a high specific surface area (1480 m²·g^-1), the specific capacitance of a ACA electrode in 6 mol·L^-1 KOH electrolyte was approximately 216 F·g^-1 at a scan rate of 100 mV·s^-1. A simple model was used to investigate the role of the pores in electrochemical performance.
- Carbon aerogel,
- Pore structure,
- Supercapacitor,
- Electrochemical performance
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