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한관희(Kwan-Hee Han),박찬우(C. W. Park),최운집(U. J. Choi),이헌우(H. W. Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
To increase the productivity and efficiency of an enterprise, all relevant product information should be provided to shop floor workers timely and in a unified form because shop floor workers are final consumers of most accumulated information generated from various departments of an enterprise. But, most existing enterprise information systems have an emphasis upon providing design/manufacturing information to office workers. Proposed in this study is a development of integrated engineering information system focused on providing coherent information required for shop floor activities. Based on the extracted functional requirements, object-oriented system design and implementation is conducted. By using this system, shop floor workers can refer to all relevant information necessary to their work easily and in a integrated form.
비백금 연료전지 촉매로서의 Co/PANi/CNT 합성 및 특성
이효준 ( Hyo June Lee ),안지은 ( Ji Eun Ahn ),김현종 ( Hun Jong Kim ),한명근 ( M. K. Han ),김한성 ( Hang Sung Kim ),이헌우 ( H. W. Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.1
Platinum catalyst activity and stability is excellent in terms of fuel cells as a catalyst here. Although it is widely used, to compensate for the high price issue non-precious fuel cell catalysts are being developed. In this study, Co/PANi/CNT composite and non-precious as a catalyst for oxygen reduction was applied. Polyaniline on the interaction between cobalt and the oxygen reduction reaction and the structural characteristics observed in the impact and heat treatment was carried out according to the improved catalytic performance. Potential range is oxygen reduction reaction 0.55 V to 0.78 V(vs. NHE) after pyrolysis. Through this study, Co /PANi/CNT composites as a potential catalyst for fuel cells were non-precious.
폐 리튬이온 배터리 양극으로부터 유기산을 이용한 코발트 회수
문지훈 ( Ji Hoon Moon ),안지은 ( J. E. Ahn ),김현종 ( Hyun Jong Kim ),손성호 ( S. H. Sohn ),이헌우 ( H. W. Lee ),김한성 ( H. S. Kim ) 한국공업화학회 2012 응용화학 Vol.16 No.1
Due to the developments of communications equipment and electronic devices, lithium ion secondary battery usage is growing. Along with demand increasing, the amount of scrap has been steadily increasing. In this study, method of cobalt recovery using organic eco-friendly is proposed. Sulfuric acid, Malic acid, Citric acid at reflux device had good cobalt leaching efficiency. And Sulfuric acid, Malic acid at the autoclave increased cobalt leaching efficiency.