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Ex-situ 스퍼터링법에 의한 $V_2O_5$ 전 고상 박막전지의 전기화학적 특성
임영창,남상철,전은정,윤영수,조원일,조병원,전해수,윤경석,Lim Y.C.,Nam S.C.,Jeon E.J.,Yoon Y.S.,Cho W.I.,Cho B.W.,Chun H.S.,Yun K.S. 한국전기화학회 2000 한국전기화학회지 Vol.3 No.1
상온에서 DC-magnetron sputtering으로 증착한 비정질의 $V_2O_5$ 박막을 양극물질로 하여 $V_2O_5/LIPON/Li$으로 구성된 박막형 리튬이차전지를 제작하였다. $V_2O_5$의 양극특성은 액체전해질을 이용한 half cell 구조에서 평가하였으며, $Ar/O_2$ 분압비의 변화에 따라 제작된 $V_2O_5$ 양극은 분압비 80/20에서 가장 좋은 특성을 보였다. 자체 제작한 $Li_3PO_4$ 타겟을 사용하여 RF-sputtering으로 순수한 질소 분위기 하에서 양극 위에 고체전해질 LIPON 박막을 형성하였으며, 1.2-4.0V vs. Li 구간에서 리튬에 대해 반응성이 없는 안정한 화합물임을 확인하였다. 음극으로 쓰인 약 $2{\mu}m$두께의 금속리튬박막은 진공 열 증착법으로 제조하였으며, $V_2O_5/LIPON/Li$의 박막형 리튬이차전지는 $1.2\~3.5V$ 구간에서 초기에 약 $150{\mu}A/cm^2{\mu}m$의 높은 방전용량을 나타내었다. Amorphous $V_2O_5$ cathode thin films were prepared by DC-magnetron sputtering at room temperature and the thin film rechargeable lithium batteries were fabricated with the configuration of $V_2O_5/LIPON/Li$ using sequential ex-situ thin film deposition techniques. The electrochemical characteristics of $V_2O_5$ cathode materials Prepared at 80/20 of $Ar/O_2$ ratio showed high capacity and cycling behaviors by half cell test. LIPON solid electrolytes films were prepared by RF-magnetron sputtering using the self-made $Li_3PO_4$ target in pure $N_2$ atmosphere, and it was very stable for lithium contact in the range of 1.2-4.0 V vs. Li. Metallic lithium were deposited on LIPON electrolyte by thermal evaporation methode in dry room. Vanadium oxide based full cell system showed the initial discharge capacity of $150{\mu}A/cm^2{\mu}m$ in the range of $1.2\~3.5V$.
임영창,김성헌,신유섭,임준완,김현직,장정현,최은창 대한이비인후과학회 2004 대한이비인후과학회지 두경부외과학 Vol.47 No.12
Background and Objectives:Supraglottic partial laryngectomy alows the removal of selected supraglottic tumors, preserving a functioning larynx and avoiding a permanent tracheotomy. The purpose of this study was to evaluate our experience with supra-glottic partial laryngectomy and to review the functional and oncologic results of the operation. Subjects and Method:We retrospectively reviewed the medical records of 40 patients with squamous cell carcinoma of the supraglottis and 1 patient with sarcomatoid cancer; (n= 31) or extended supraglottic laryngectomy (n= 10) from May 1991 and December 2001. Fifteen patients had tumors in T1, 25 patients in T2, and 1 patient in T3. The primary lesion of the tumors were as follows:suprahyoid epiglottis (n= 12), infrahyoid epiglottis (n= 13), aryepiglottic fold (n= 10), false vocal cord (n= 4), and pyriform sinus (n= 2)survival rate and the prognostic factors. The evaluations of postoperative function were performed with regard to decannulation, oral diet, and average time taken to decannulate and to initiate oral intake. Results:The disease-specific 3-year survival rate was 87%. Pathologic lymph node metastasis and the invasion of tumor to the preepiglotic space were significant clinical prognostic factors afecting survival. Local recurence was developed in only one case (2.6%). Decanulation was posible in 93% of our nnulation time was postoperative 28.3 days and the average time taken to begin oral feeding time was 23.2days. Conclusion:This study sugests that supraglottic par-tial laryngectomy may be used with acceptable oncologic and functional results for supraglotic cancers.