결합제 첨가에 따른 탄소 양극의 전극 특성

안흥주; 오한준; 김인기; 김홍곤; 지충수; 김영철; 고영신; Hong Joo Ahn; Han Jun Oh; In Ki  Kim; Honggon Kim; Choong Soo Chi; Yong Cheul Kim; Young Shin Ko

Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.7, 779-786, November, 2001

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결합제 첨가에 따른 탄소 양극의 전극 특성

Electrode Properties of Carbon Anodes with Various Binder Contents

안흥주^†, 오한준 ¹, 김인기¹, 김홍곤 ², 지충수 ³, 김영철 , 고영신⁴

한양대학교 화학과, 서울 133-791
¹한서대학교 재료공학과, 서산 352-820
²한국과학기술연구원 CFC대체연구센터, 서울 136-791
³국민대학교 금속재료공학부, 서울 136-702
⁴서울교육대학교 과학교육과, 서울 137-742

Hong Joo Ahn^†, Han Jun Oh¹, In Ki Kim¹, Honggon Kim², Choong Soo Chi³, Yong Cheul Kim , and Young Shin Ko⁴

Department of Chemistry, Hanyang University, Seoul 133-791, Korea
¹Department of Materials Science, Hanseo University, Seosan 352-820, Korea
²CFC Alternatives Research Center, Korea Institute of Science & Technology, Seoul 136-791, Korea
³School of Metallurgical and Materials Engineering, Kookmin University, Seoul 136-702, Korea
⁴Department of Science Education, Seoul National University of Education, Seoul 137-742, Korea

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초록

결합제인 coal tar pitch와 petroleum cokes를 주원료로 결합제 첨가량을 변화시켜 불소 전해용 탄소 전극을 제조한 후 결합제 첨가가 전극특성에 미치는 영향을 조사하였다. 탄소전극의 특성은 물리적 특성, 기계적 강도, 그리고 KF·2HF 용액에서의 cyclic voltammogram과 0.5 M H2SO4 수용액에서 임피던스 스펙트로스코피의 전기화학적 거동을 통하여 평가하였다. 이 결과 결합제 45 wt%가 첨가된 경우 제일 양호한 전극특성을 나타냈으며 불소전해 시 임계전류밀도는 12.07 A/dm(2)로 가장 높은 값을 얻었다. 이와 같이 양호한 전극특성이 나타난 것은 전극표면에 존재하는 기공의 특성과 밀접한 관련이 있었으며 표면기공의 적절한 크기와 분포가 실질적으로 전극의 비표면적을 향상시켰기 때문이다.

Carbon electrodes for fluorine electrolysis were prepared from petroleum cokes containing coal tar pitch as binder and the effects of binder contents on electrode properties were investigated. The evaluations were performed by measuring physical properties, mechanical strength, and electrochemical behavior by cyclic voltammogram in molten KF·2HF electrolyte and impedance spectroscopy in 0.5 M H2SO4. It was found that the carbon anode formed with 45 wt% coal tar pitch as the binder had hetter electrode properties compated to those with other contents. This porous carbon anode showed a high critical current density of 12.07 A/dm(2) for fluorine electrolysis. The enhanced electrochemical properties in electrode were due to proper pore distribution and size of pores, which effectively increased internal surface area.

Keywords:anode;binder;carbon;fluorine;impedance

[References]

Waranabe N, Graphite Fluorides, p. 1, Elsevier Science Pub (1988)
Nakajima T, J. Fluor. Chem., 40, 407 (1988)
Watanabe N, Denki Kagaku, 31, 698 (1963)
Childs WV, J. Electrochem. Soc., 142(7), 2286 (1995)
Brown OR, Electrochim. Acta, 32, 1163 (1987)
Groult H, J. Appl. Electrochem., 24(9), 870 (1994)
Oh HJ, J. Korean Chem. Soc., 40, 308 (1996)
小林和夫, 改訂炭素材科入門, p. 13, 炭素材科學會 (1984)
Miyazaki K, J. Mater. Sci., 16, 752 (1981)
Ogawa I, J. Mater. Sci., 16, 1281 (1981)
Ghr H, Ber. Bunsenges. Phys. Chem., 85, 274 (1981)
Ghr H, Z. Phys. Chem. Neue Folge, 148, 105 (1986)
Ghr H, Oh HJ, Schiller CA, Jahrestagung der GDCh-Fachgruppe Angewandte Elektrochemie 1994, GDCh-Monographie Band2, p. 341 (1995)
Miller N, Dissertation, Erlangen-Nuernberg (1980)
Mandelbrot BB, The Fractal Geometry of Nature. Freeman, San Francisco (1982)
Oh HJ, Kim JG, Jeong YS, Chi CS, Jpn. J. Appl. Phys., 39, 6690 (2000)

[Related Articles]

[1] Waranabe N, Graphite Fluorides, p. 1, Elsevier Science Pub (1988)

[2] Nakajima T, J. Fluor. Chem., 40, 407 (1988)

[3] Watanabe N, Denki Kagaku, 31, 698 (1963)

[4] Childs WV, J. Electrochem. Soc., 142(7), 2286 (1995)

[5] Brown OR, Electrochim. Acta, 32, 1163 (1987)

[6] Groult H, J. Appl. Electrochem., 24(9), 870 (1994)

[7] Oh HJ, J. Korean Chem. Soc., 40, 308 (1996)

[8] 小林和夫, 改訂炭素材科入門, p. 13, 炭素材科學會 (1984)

[9] Miyazaki K, J. Mater. Sci., 16, 752 (1981)

[10] Ogawa I, J. Mater. Sci., 16, 1281 (1981)

[11] Ghr H, Ber. Bunsenges. Phys. Chem., 85, 274 (1981)

[12] Ghr H, Z. Phys. Chem. Neue Folge, 148, 105 (1986)

[13] Ghr H, Oh HJ, Schiller CA, Jahrestagung der GDCh-Fachgruppe Angewandte Elektrochemie 1994, GDCh-Monographie Band2, p. 341 (1995)

[14] Miller N, Dissertation, Erlangen-Nuernberg (1980)

[15] Mandelbrot BB, The Fractal Geometry of Nature. Freeman, San Francisco (1982)

[16] Oh HJ, Kim JG, Jeong YS, Chi CS, Jpn. J. Appl. Phys., 39, 6690 (2000)