-
RISS 활용도 분석
-
일본/중국/유럽자료
-
최신/인기 학술자료
-
해외논문구매대행(E-DDS)
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 장기훈 (검색결과 92 건)
- 무료
- 기관 내 무료
- 유료
-
-
2P-58 : 슈퍼커패시터용 폴리피롤/니켈코발트 수산화물 전극의 제작
장기훈,안희준 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
본 실험에서는 니켈코발트수산화물 전극 표면위에 전도성 고분자인 폴리피롤을 코팅한 전극과 니켈코발트수산화물/폴리피롤 복합체전극의 전기화학적 특성을 비교하였다. 니켈코발트수산화물/폴리필로 전극은 Chemical bath deposition(CBD) 기술과 Electro chemical deposition(ECD) 기술을 이용하여 제작하였다. 우선 폴리피롤이 코팅된 니켈코발트 수산화물 전극의 제작을 위해, nickel nitrate와 cobalt chloride를 CBD 방법을 통하여 니켈코발트 수산화물 구조체를 제작하고 그 위에 피롤 단량체를 ECD방법을 사용하여 폴리피롤로 코팅시켰다. 니켈 코발트 수산화물/폴리피롤 복합체 전극은 nickel nitrate와 cobalt chloride로 CBD방법을 사용할 때 같이 첨가하여 제작하였다. 준비된 니켈코발트수산화물-폴리피롤 전극의 형태와 넓은 표면적은 Scanning electron microscopy(SEM)을 통하여 분석하였으며 또한 Cyclic voltammetry(CV), galvanostatic charge-discharge 그리고 impedance spectroscopy(EIS)를 통해 전기화학적 특성을 확인하였다. Specific capacitance는 2M의 KOH전해질에서 potential range -0.2~0.5V, scan rate 50mV/s 일 때 2094F/g의 결과를 나타내었다.
-
-
장기훈,김준성,조현진,김권천 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.1
The thyroid gland has been considered as an infrequent metastasis site. However, the incidence of thyroid involvement in reported autopsy series varies from 1.25% to 24%. In most autopsy series, breast and lung cancers have been the most frequent metastatic diseases to the thyroid gland, In contrast, renal cell carcinoma is the most frequent source of metastasis in clinical series. Many reports suggested that ultrasonography and subsequent ultrasonography-guided FNAB are mostly best suited for diagnosis of thyroid metastasis. Metastasis to the thyroid gland is associated with a poor prognosis and the prognosis depends essentially on the primary cancer. Surgery may prolong survival in a patient in whom the thyroid metastasis isolated, and thus early diagnosis and aggressive treatment should be performed in patients with the history of cancer.
-
-
장기훈,유성일,안희준 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Transition metal oxides have received tremendous interests in supercapacitors over the last decade due to their fast and reversible Faradaic redox reactions which is known as pseudo-capacitance. Several methods have been used to synthesize metal oxide nanostructures including chemical bath deposition, hydroxide decomposition, thermal decomposition of carbonates, nanocasting, electrodeposition, combustion, coprecipitation and the sol-gel method. Many of these have drawbacks in that they are energy consuming, lengthy and involve multiple steps. Especially, all methods require calcinations/heat treatment at 200-600°C for 1-24 hrs. Therefore, faster, more facile and energy efficient methods for metal oxide nanostructure production are of interest. Here we report an agile and facile method for the preparation of high-performance supercapacitive cobalt oxide nanoflakes by using an intense pulsed light (IPL) technology. By this method, the cobalt oxide formation can be accomplished within milliseconds by irradiating the broad wavelength light with high energy density on cobalt oxide precursor, which is exceptionally faster than other metal oxide formation methods. We have fabricated cobalt oxide nanoflakes on Ni-foam substrate by using the IPL technique. The as-prepared substrates are further utilized as a supercapacitor electrode, and their supercapacitive performance will be discussed in the presentation.
-
-
-
-
