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정철수,이도원,Jung, Cheol-Soo,Lee, Do-Weon 한국진공학회 2007 Applied Science and Convergence Technology Vol.16 No.3
리튬이온 제조공정에서 전해질 주입 후 반드시 거쳐야 하는 숙성공정은 일반적으로 별로 중요하게 다루어 지지 않고 있다. 왜냐하면 전지 숙성공정이 전지성능에 영향을 주는 인자에 대하여 그다지 깊이 있게 연구가 되어있지 않기 때문이다. 하지만 숙성공정 중에 나타나는 OCV 변화는 전해질 내에 포함되어 있는 성분이 전극으로 전기화학적 흡착되어 나타나는 현상으로 SEI 피막 형성에 매우 중요한 역할을 하게 된다. 이에 본 연구에서는 숙성기간 중에 변하게 되는 OCV와 SEI피막의 관계, 그리고 전지성능과의 연계에 대하여 깊이 있게 논의하고자 한다. In the Li ion battery fabrication process, an aging step has treated as a miner step because there is not so much data to define the relationship between the phenomena generated in aging process and the battery performances. However, the OCV(open circuit voltage) change in the aging process is shown by the electrochemical absorption of the electrolyte component to the both electrodes(anode or cathode) and the absorbed layer to the electrode affects to form the solid electrolyte interface(SEI) layer during the first charge process. In this report, the adsorbed materials are designed deliberately and are cleared to affect to the SEI layer formation.
Molecular Structure of PCP Pincer Complexes: Poisoning Catalyst on the Dehydrogenation of Alkanes
이지현,전상진,권기혁,이도원,Lee Ji Hyun,Chun Sang Jin,Kwon Ki Hyeok,Lee Do Weon Korea Crystallographic Association 2005 韓國結晶學會誌 Vol.16 No.1
알칸화합물(alkanes)에서 탄소-수소결합을 활성화시켜서 더욱 값이 비싸고 더 유용한 알켄화합물(alkenes)로 만들 수 있는 촉매를 만들고자 지난 수 십 년간 많은 화학자들이 연구해왔다 이러한 목적의 하나로서 두개의 수소를 가지는 이리디움 P-C-P핀서(pincer) 착물 $(IrH_2{C_6H_3-2,6-(CH_2PBu_2^t)_2})$을 성공적으로 합성하였다. 이 착물은 알칸의 탈수소화반응(dehyrogenation)에 아주 효과적인 촉매로 알려졌다 알칸의 탈수소화반응에 촉매독으로 작용하는 질소, 물, 이산화탄소 및 일산화탄소와 같은 작은 화합물들과 직접 반응시켜서 어떻게 촉매독으로 작용하는지를 알아봤다. 촉매독으로 작용할 수 있는 화합물들을 합성하여 핵자기공명분광법(NMR)과 적외선분광법(IR)으로 확인하였고 분자구조를 알아보기 위해서 단결정X-ray 회절법을 통하여 확인하였다. 본 논문에서는 촉매 및 촉매독물질의 합성과 분자구조와 각각의 화합물의 반응성과 특이성을 알아보았다. The dihydrido P-C-P pincer complex, $IrH_2{C_6H_3-2,6-(CH_2PBu_2^t)_2}$ (1), was successfully prepared from the reaction of the hydrochloride complex, $IrClH (C_6H_3-2,6-(CH_2PBu_2^t)_2}$, and super acid $(LiBEt_3H)$ under 1 atm of hydrogen in pentane solution at room temperature and followed by Heating at $130^{\circ}C$ in vacuo. Jensen recently found that the dihydrido P-C-P pincer complex 1 is a highly active homogeneous catalyst for the transfer dehydrogenation of alkanes with unusual longterm stability at temperatures as high as $200^{\circ}C$. The treatment of dihydrido complex 1 with nitrogen, water, carbon dioxide, and carbon monoxide in presence of tert-butylethylene (the) at room temperature in an appropriate solution gave the dinitrogen complex, $[Ir{C-6H_3-2,6-(CH_2PBu_2^t)_2}]_2({\mu}-N_2)$ (2), the hydrido hydroxyl complex, $IrH(OH){C_6H_3-2,6-(CH_2PBu_2^t)_2}$ (3), the carbon dioxide complex, $Ir({\eta}^2-CO_2) {C_6H_3-2,6-(CH_2PBu_2^t)_2}$ (including the bicarbonate complex, $IrH({\kappa}^2-O_2COH){C_6H_3-2,6-(CH_2PBu_2^t)_2}\;(4))$, and the carbonyl complex, $Ir(CO) {C_6H_3-2,6-(CH_2PBu_2^t)_2}\;(5)$ (including the carboxyl complex, $IrH(C(O)OH) {C_6H_3-2,6-(CH_2PBu_2^t)_2}\;(6))$, in good yield, respectively. These P-C-P iridium complexes were isolated and characterized by $^1H,\;^{13}C,\;^{31}P\; NMR$, and IR spectroscopy. In addition, the complexes (1-6) were characterized by a single crystal X-ray crystallography. These complexes account for these small molecules' inhibition of dehydrogenation of alkanes catalyzed by the dihydrido complex 1.
가동율 변화에 따른 자원회수시설 최적운영방안 -서울시 자원회수시설 가동율 향상방안을 중심으로-
이재성 ( Jae Sung Lee ),이도원 ( Do Weon Lee ) 서울시립대학교 산업기술연구소 2006 산업기술연구소논문집 Vol.14 No.-
Due to the NIMBY of citizens against the resource recovery facilities constructed for treating the domestic waste and low operation rate, we have studied the optimum management program with analyzing the present operation, citizens` consciousness. For the optimum management program, it is necessary to applicate the RBI (risk based inspection) increasing the safety of equipment, life continuation, economical efficiency and to secure reliability and accuracy of result measuring environment influence material and to introduce the public concept like trust management union. And we have to maintain mutual cooperative relationship and to accomplish truth recovery with residents through the system complementary enlarging supporting project.
Atom Transfer Radical Polymerization of Methyl Methacrylate Using CuBr/Amines with Silicon Groups
Lee, Ji Hyun,Choi, Dae Seung,Kim, Jung Hee,Lee, Do Weon 한국공업화학회 2004 응용화학 Vol.8 No.2
Atom transfer radical polymerization (ATRP) is one of the most successful controlled/"living" radical polymerization. We reported a systematic study of the ATRP of methyl methacrylate (MMA) using the catalytic system comprising CuX/alkyl pyridine-2-carboximidates. Silicon groups are usually better π-electron donor/acceptor in comparison to carbon in the same group. To compare multidentate amine ligand containing silicon versus carbon, several amine ligands with silicon groups were prepared. The amine ligands containing silicon groups were found to be highly effective ligand for copper(I) bromide catalyzed ATRP of MMA. The effects of solvent, temperature, catalyst/initiator and solvent/monomer ratio on ATRP of MMA have been studied systematically. The optimum conditions for the ATRP of MMA were found to be a [CuBr]。/[Ligand]。/[EB₁B]。/[MMA]。 ratio of 1 : 2 : 1 : 400 at 80℃ in a veratrole solution.