• 조명전기설비학회논문지
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• 제23권2호
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• pp.168-174
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• 2009

본 연구에서는 Poly(VdF-HFP)를 사용한 Gel Polymer 전해질을 제작하여 기존의 액상전해질과 비교하였다. 제작된 젤 고분자 전해질의 성분은 FTIR 분석을 사용하여 화학적 구조를 고찰한 후, 성분조사를 통해 Gel Polymer 전해질임을 확인하였으며, SEM 관측을 통해 Polymer 상태의 Gel 전해질의 구조를 확인하였다. 본 실험에서 제작된 젤 고분자 전해질을 구성하는 DEC와 PC의 최적의 성분비는 5 : 5임을 확인할 수 있었다. 최적조건의 젤 고분자전해질을 이용하여 제작된 염료 태양전지(DSCs)의 효율은 $3{\sim}4[%]$정도의 측정값을 얻었으며, 이상의 결과로부터 기존의 액상 전해질을 대체할 수 있는 준 고체형 염료태양전지의 제작이 가능함이 확인되었다.

• Bulletin of the Korean Chemical Society
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• 제33권12호
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• pp.4093-4097
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• 2012

We introduced a new UV-cured resin polymer gel as an electrolyte for dye-sensitized solar cells (DSSCs) that is cured with UV irradiation to form a thin film of UV-cured resin polymer gel in the cells. The gel film was characterized and its potential for use as an electrolyte in DSSCs was investigated. This new UV-cured resin polymer gel was successfully applied as a gel polymer electrolyte in DSSCs overcoming the problems associated with the liquid electrolytes in typical DSSCs. The effect of ${\gamma}$-butylrolactone (GBL) on the long-term stability and photovoltaic performance in DSSCs using this UV-cured resin polymer gel electrolyte was also investigated. The results of the energy conversion efficiency, ionic conductivity and Raman spectra of the UV-cured resin polymer gel electrolyte with the addition of 6 wt % GBL to the UV-cured resin polymer electrolyte showed good long-term stability and photovoltaic performance for the DSSCs with the UV-cured polymer gel electrolyte.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2003년도 추계학술대회
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• pp.351-357
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• 2003

The optimum polymer gel electrolyte composition ratio was 23 : 66 : 11 wt% of P(VdF-co-HFP) : PVP =20 : 3), (PC: EC =44 : 22) and TEABF$_4$. And the optimal thickness of polymer gel electrolyte was 50 ${\mu}{\textrm}{m}$. The electrochemical characteristics result of unit cell were 31.41 Fig of specific capacitance, and 3.21$\times$10$^{-3}$ S/cm of ion conductivity. Ion conductivity of polymer gel electrolytes decreased according to added PVP through impedance analysis, and it was higher in 7 wt%, but electrochemical characteristics of unit cell were better in 3 wt% PVP. And for excellent ion conductivity of polymer gel electrolytes, the use of a thin layer electrolyte(20 $\mu\textrm{m}$) was an effective method, but with unit cell application, the best thickness was 50 $\mu\textrm{m}$. Unit cell showed higher capacitance and more stable electrochemical performance when hot pressed between polymer gel electrolyte and electrode. This results from enhancement of the physical contact between the electrode and the polymer gel electrolyte and good accessibility of the liquid electrolyte to the electrode surface.

• 한국전기전자재료학회논문지
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• 제17권6호
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• pp.608-614
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• 2004

The gel polymer electrolyte was prepared by radical polymerization using tetra(ethylene glycol) diacrylate and tri(ethylene glycol) dimethacrylate to investigate affect of the number of ethylene oxide. The gel polymer electrolyte showed good electrochemical stability up to 4.5 V vs. Li/Li and high ionic conductivity at various temperatures. The lithium-ion polymer batteries with the gel polymer electrolyte, tetra(ethylene glycol) diacrylate- and tri(ethylene glycol) dimethacrylate-based, also represented good electrochemical performances such as rate capability, low-temperature performances and cycleability. However, the cell with tri(ethylene glycol) dimethacrylate, which has three ethylene oxide, showed better electrochemical performance.

• 멤브레인
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• 제22권3호
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• pp.208-215
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• 2012

PVA와 PAA블랜드의 용액주조법을 통하여 겔 고분자 전해질막이 제조되었다. 블랜드 내의 PAA함량은 30에서 80 wt% 사이 범위에서 조절되었다. 겔 고분자 전해질을 이용하여 아연공기전지를 제작하였다. 제조된 겔 고분자 전해질의 기계적, 전기적 특성을 인장실험과 임피던스 실험을 통하여 측정하였다. 아연공기전지의 성능은 current interrupt method와 정전류 방전실험을 통하여 측정하였다. 겔 고분자 전해질 내의 PAA함량이 증가함에 따라 인장강도 및 인장탄성계수가 감소하였다. 반면, PAA함량의 증가에 따라 겔 고분자 전해질막의 이온전도도는 증가하였다. 이와 같은 이온전도도의 증가의 아연공기전지 내에서의 효과는 current interrupt method와 정전류 방전실험에서 확인되었다. PAA함량이 높은 겔 전해질막으로 제조된 전지는 낮은 IR손실과 높은 방전용량을 보였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.159-162
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• 1998

The new type polymer electrolyte composed of polyacrylonitrile(PAN) baed polymer electrolyte contain LiClO$_4$-EC/PC and LiPF$\sub$6/-EC/PC were developed for the weightless and long or life time of lithium polymer battery system with using polyaniline electrode. The gel type electrolytes were prepared by PAN at different lithium salts in the glove box. We prepared for polymer electrolyte with knife casting method. The minimum thickness of PAN gel electrolyte for the slim type is about <400∼500$\mu\textrm{m}$. These gel electrolytes showed good compatibility with lithium electrode. The test cell of Li/polymer electrolyte/Lithium cobalt oxide solid state cell which was prepared by different lithium salt was researched by electrochemical technique. Resistance of polymer electrolyte which consist of LiClO$_4$ is more less than that of LiPF$\sub$6/ and cycle life is more longer than that of LiPF$\sub$6/.

• 한국전기전자재료학회논문지
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• 제11권10호
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• pp.768-772
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• 1998

The new type polymer electrolyte composed of polymethyl methacrylate(PMMA) - polyethy leneoxide(PEO) contain $LiClO_4$ -EC/PC was developed for the weightless and long or life time of lithium polymer batery system with using polyaniline electrode. the gel type electrolytes were prepared by PMMA with PEO at different lithium salts in the glove box. The minimum thickness of PMMA-PEO gel electrolyte for the slim type is about(400~450$\mu\textrm{m}$. These gel electrolyte showed good compatibility with lithium electrode. The test cell Li/polymer electrolyte/polyaniline solid state cell which was prepared by different lithium salt was researched by electrochemical technique.

• 전기화학회지
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• 제13권2호
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• pp.145-152
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• 2010

본 연구에서는 organophosphate를 기반으로 한 과불소화된 아크릴레이트 가교제를 사용하여 제조한겔 고분자 전해질의 이온 전도도 및 전기화학적 특성을 평가하였다. 과불소화된 아크릴레이트 가교제를 사용하여 만든 겔 고분자 전해질은 액체전해질의 함량이 최대 97 wt%까지 안정한 겔 상태를 유지하였다. 본 연구에서 제조한 겔 고분자 전해질의 이온전도도는 $30^{\circ}C$에서 $1.0\;{\times}\;10^{-2}\;S/cm$의 값을 가졌다. 또한 전기화학적 안정성 테스트에서도 약 4.5V로 이상까지 산화에 의한 열화가 없이 안정하였다. 합성된 겔고분자 전해질을 리튬이온 고분자 전지에 적용하여 그 활용성을 평가하였다. 양극으로는 $LiCoO_2$를 사용하였으며 음극으로는 카본을 사용하였다. 이렇게 만든 리튬이온 고분자 전지는 0.1C에서 136.11 mAh/g의 용량으로 이론용량과 거의 비슷한 값을 나타내었으며, 2C 방전에서도 초기 용량의 91%를 유지하였다. 또한 500번의 충방전 후에도 초기 용량의 70%정도의 용량을 유지하였다.

• 한국전기전자재료학회논문지
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• 제18권2호
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• pp.142-147
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• 2005

In this work, a gel polymer electrolyte (GPE) was prepared using polyoxyalkylene glycol acrylate (POAGA) as a macromonomer LiCoO$_2$/GPE/graphite cells were prepared and their electrochemical properties were evaluated at various current densities and temperatures. The ionic conductivity of the GPE was more than 6.2${\times}$10$^{-3}$ S$.$$cm^{-1}$ / at room temperature. The GPE had good electrochemical stability up to 4.5 V vs. Li/Li$^{+}$. POAGA-based cells were showed good electrochemical performances such as rate capability, low-temperature performance, and cycleability. The cells, also, passed a safety test such as the overcharge and nail-penetration test.t.

• 전기화학회지
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• 제5권4호
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• pp.197-201
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• 2002

In this study, a gel polymer electrolyte was prepared from urethane acrylate and its electrochemical performances were evaluated. And, $LiCoO_2/GPE/graphite$ cells were prepared and their performances depending on discharge currents and temperatures were evaluated. The precursor containing $5 vol\%$ curable mixture had a low viscosity relatively. Ionic conductivity of the gel polymer electrolyte at room temperature and $-20^{\circ}C$ was ca. $5.9\times10^{-3}S{\cdot}cm^{-1}\;and\;1.7\times10^{-3}S{\cdot}cm^{-1}$, respectively. GPE showed electrochemical stability up to potential of 4.5V vs. $Li/Li^+.LiCoO_2/GPE/graphite$ cell showed a good high-rate and a low-temperature performance.