고성능 슈퍼커패시터 전극으로서 응용하기 위한 활성화된 카복시메틸셀룰로오스 나트륨계 탄소폼의 특성 (Characterization of Activated Sodium Carboxymethyl Cellulose-based Carbon Foams Containing Expanded Graphites as High Performance Supercapacitor Electrodes)

서지정보

· 발행기관 : 한국기계가공학회
· 수록지 정보 : 한국기계가공학회지 / 23권 / 2호 / 78 ~ 86페이지
· 저자명 : 이정재, 이재준, 김진수, 최선호, 홍성주, 곽이구, 신혜경

초록

Activated sodium carboxymethyl cellulose (CMC) carbon foam containing expanded graphites (EGs) waswere prepared by carbonization and activation process after cross-linking CMC paste with EG using an easy electron beam irradiation (EBI) method. and freeze-driedthen freeze-drying, to study theas supercapacitor electrode materials. AIn the morphology of activated CMC-based carbon foams containing EGs with rich pores were formed, and EGs with abundant interlayer pores were well impregnated well with CMC. In addition, the BET surface area of activated CMC-based carbon foam containing abundant interlayer pores increased with as the increase of in the EG content of EG. Additionally, Iin the MP plot, the development of ultra- micro pores below 2 nm was observed owingdue to the chemical activation treatment of the CMC-based carbon foams. The Barrett JoynerBJH Halenda plot showsplot was observed that mesopores and macro pores existed together. In – – XRD analysis, the peak of 2 =26° was thinner and a strong peak was developed with an increase of, and a θ strong peak was developed with an increase in the content of expanded graphites owing to their high crystallinity. The Raman profile indicatedrepresented that the G peak intensities related to the ordered layered graphite structure increased those of the D peak associated with the disordered graphite structure as the EG content of expanded graphite increased, whereas tThe crystallinity of the activated CMC-based carbon foams containing EGs playeds an important role in increasing the electrical conductivity of the sample electrode. As a resultConsequently, the porosity and high crystallinity of expanded graphite reduced the resistance between the electrolyte and the electrode, thereby increasing the current peak of the CV and increasing the capacitance value of the GCD .

영어초록

Activated sodium carboxymethyl cellulose (CMC) carbon foam containing expanded graphites (EGs) waswere prepared by carbonization and activation process after cross-linking CMC paste with EG using an easy electron beam irradiation (EBI) method. and freeze-driedthen freeze-drying, to study theas supercapacitor electrode materials. AIn the morphology of activated CMC-based carbon foams containing EGs with rich pores were formed, and EGs with abundant interlayer pores were well impregnated well with CMC. In addition, the BET surface area of activated CMC-based carbon foam containing abundant interlayer pores increased with as the increase of in the EG content of EG. Additionally, Iin the MP plot, the development of ultra- micro pores below 2 nm was observed owingdue to the chemical activation treatment of the CMC-based carbon foams. The Barrett JoynerBJH Halenda plot showsplot was observed that mesopores and macro pores existed together. In – – XRD analysis, the peak of 2 =26° was thinner and a strong peak was developed with an increase of, and a θ strong peak was developed with an increase in the content of expanded graphites owing to their high crystallinity. The Raman profile indicatedrepresented that the G peak intensities related to the ordered layered graphite structure increased those of the D peak associated with the disordered graphite structure as the EG content of expanded graphite increased, whereas tThe crystallinity of the activated CMC-based carbon foams containing EGs playeds an important role in increasing the electrical conductivity of the sample electrode. As a resultConsequently, the porosity and high crystallinity of expanded graphite reduced the resistance between the electrolyte and the electrode, thereby increasing the current peak of the CV and increasing the capacitance value of the GCD .

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