Cited 1 time in webofscience Cited 0 time in scopus

Hierarchical Microcellular Microporous Carbon from Polyamic Acid Cryogel and its Electrochemical Capacitance

Hierarchical Microcellular Microporous Carbon from Polyamic Acid Cryogel and its Electrochemical Capacitance
Choi, YM[Choi, Yong-Mun]Singh, KP[Singh, Kiran Pal]Park, JD[Park, Jong Deok]You, NH[You, Nam-Ho]Yang, CM[Yang, Cheol-Min]Goh, M[Goh, Munju]Yu, JS[Yu, Jong-Sung]
DGIST Authors
Singh, KP[Singh, Kiran Pal]; Park, JD[Park, Jong Deok]; Yu, JS[Yu, Jong-Sung]
Issue Date
Energy Technology, 4(2), 278-287
Article Type
The obtainment of a high specific surface area (SSA) without disrupting the conductivity of carbon is very challenging. Herein, an as-synthesized polyamic acid (PAA) derivative dissolved in 1,4-dioxane solvent was freeze dried to prepare a PAA cryogel, which allowed homogenous shrinkage of the texture and a high carbon yield upon carbonization. This work presents the successful template-free preparation of a high-surface area microporous carbon with a unique microcellular structure by simple carbonization treatment of a PAA cryogel. Upon increasing the carbonization temperature, the N content decreased, which was unfavorable for capacitance, but simultaneously, both the surface area and the crystallinity increased, which was beneficial in increasing the capacitance; these results are indicative of an interesting trade-off relationship between surface area, conductivity, and the N content of the carbon. In particular, C-PAA(1000) prepared by carbonization at 1000 degrees C from the PAA cryogel showed a high porosity of approximately 90.8% and a remarkably high SSA of 2038 m(2)g(-1) along with high crystallinity and effective N doping favorable for good conductivity; this material thus illustrates a high specific capacitance of 248 Fg(-1) at 0.5 Ag-1 and excellent stability in inorganic electrolyte.
Wiley-VCH Verlag
Related Researcher
  • Author Yu, Jong Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
There are no files associated with this item.
Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles

qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.