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CO₂ 분위기에서 활성화된 카본블랙의 비표면적 변화 및 전기화학평가 통한 배터리용 음극재 이용 가능성 연구
정보슬(Bo-Seul Jeong),이상혜(Sang-Hye Lee),이상민(Sang-Min Lee),노재승(Jae-Seung Roh) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.6
본 연구는 CO₂ 분위기에서 burn off에 따른 활성화된 카본블랙을 제조하였으며, 비표면적, 미세구조, 전기화학특성평가를 실시하였다. BET 분석을 통해 burn off가 증가할수록 비표면적이 증가하는 것을 확인하였다. 이후 TEM 분석을 통해 burn off가 증가할수록 카본블랙 내부에 중공이 형성되는 것을 확인하였다. 전기화학평가를 통해 중공 구조의 활성화된 카본블랙의 구조 안정성을 확인하였으며, 향후 배터리용 음극재로써 활용을 위한 기초데이터로 사용할 수 있을 것으로 기대된다. In this study, activated carbon black was prepared by burn off in a CO₂ atmosphere, and specific surface area, microstructure, and electrochemical characteristics were evaluated. Through BET analysis, it was confirmed that the specific surface area increased as burn off increased. Subsequently, through TEM analysis, it was confirmed that as the burn off increased, a hollow was formed inside the carbon black. Through the electrochemical evaluation, the structural stability of the activated carbon black with a hollow structure was confirmed, and it is expected to be used as basic data for use as an anode material for batteries in the future.
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류현규,최대섭,조수범,신화선,최호철,정보슬,서혜민,조재민 대한자기공명의과학회 2015 Investigative Magnetic Resonance Imaging Vol.19 No.3
Purpose: The purpose of this study was to evaluate the associated brain parenchymalabnormalities of developmental venous anomalies (DVA) with susceptibility-weightedimage (SWI). Materials and Methods: Between January 2012 and June 2013, 2356 patientsunderwent brain MR examinations with contrast enhancement. We retrospectivelyreviewed their MR examinations and data were collected as per the following criteria:incidence, locations, and associated parenchymal signal abnormalities of DVAs onT2-weighted image, fluid-attenuated inversion recovery (FLAIR), and SWI. Contrastenhanced T1-weighted image was used to diagnose DVA. Results: Of the 2356 patients examined, 57 DVAs were detected in 57 patients(2.4%); 47 (82.4%) were in either lobe of the supratentorial brain, 9 (15.7%) were inthe cerebellum, and 1 (1.7%) was in the pons. Of the 57 DVAs identified, 20 (35.1%)had associated parenchymal abnormalities in the drainage area. Among the 20 DVAswhich had associated parenchymal abnormalities, 13 showed hemorrhagic foci onSWI, and 7 demonstrated only increased parenchymal signal abnormalities on T2-weighted and FLAIR images. In 5 of the 13 patients (38.5%) who had hemorrhagicfoci, the hemorrhagic lesions were demonstrated only on SWI. Conclusion: The overall incidence of DVAs was 2.4%. Parenchymal abnormalitieswere associated with DVAs in 35.1% of the cases. On SWI, hemorrhage wasdetected in 22.8% of DVAs. Thus, we conclude that SWI might give a potential forunderstanding of the pathophysiology of parenchymal abnormalities in DVAs.
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