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고율 특성 리튬 유황 전지용 스펀지 형태의 유황-아세틸렌블랙 복합구조체
니마카리마(Neema Cyril Karima),안욱(Wook Ahn) 한국전지학회 2021 한국전지학회지 Vol.1 No.1
본 연구에서는 간단한 솔루션 기반 합성 방법으로 나노 입자 크기를 갖는 유황-아세틸렌블랙 복합체를 합성하고, 다중 기공을 갖는 스펀지 형태의 전극 복합체를 제조함으로서 유황의 담지능력을 향상시키는 연구를 수행하였다. 이는 전기전도도와 리튬폴리설파이드 화합물이 음극으로 확산하는 것을 방지하는 방법으로 사이클 내구성과 높은 에너지밀도를 실현하였다. In this study, a facile solution-based synthesis method is used to synthesize the nano-sized sulfur-acetylene black composite for Li-S battery. The sponge structured acetylene black improves the sulfur infiltration ability in the composite by creating multiple pores. The composite prevents shuttle mechanism by blocking the diffusion of polysulfide to the anode electrode, leading to the long cycle life with reliable rate capability and high energy density of Li-S battery.
경추 추간판 탈출증 치료를 위한 전방경유 골 이식법의 개선에 관한 임상적 연구
안욱,신호,김종기 대한신경외과학회 1981 Journal of Korean neurosurgical society Vol.10 No.1
A total of 236 anterior cervical interbody fusion has been performed. In 76 cases mostly Cloward's original method has used. During these operations several technical modifications were made. With these technique 159 cases were operated and showed marked beneficial results. 1. For widening of the interspace, a halter traction was better than the vertebra spreader. 2. Extension of the cervical spine when drilling of the vertebral bodies prevented the postoperative flexion deformity of the neck. 3. The dowel size, 2mm. in diameter larger than the drill-hole was used and the cortical end plate of the dowel was fixed at the anterior edges of the vertebral bodies. 4. It was safe to leave the posterior edges of the vertebral bodies when drilling. 5. If the dowel was too thin, 2 pieces of the graft were packed. 6. Post-operative pain on the dornor bone site and walking difficulty were minimized when the dowel was obtained from the inner aspect of the ileum. Many technical fitfalls of this type of operation were analyzed and discussed the improved surgery.