메타휴리스틱 알고리즘을 활용한 argyrodite-type 신규 고체전해질 소재 개발 = Discovery of argyrodite-type novel solid state electrolyte using a methaheuristic algorithm

목차 (Table of Contents)

• 1. 서론 ··························································· 1
• 2. 이차전지와 전고체전지 ···································· 4
• 2.1. 이차전지의 구조와 작동원리 ············································ 4
• 2.1.1 양극····································································· 5
• 2.1.2 음극 ···································································· 7
• 2.1.3 전해질 ································································· 8
• 2.1.4 분리막 ································································· 9
• 2.1.5 Half cell, Full cell, Symmetric cell ······························ 9
• 2.2. 고체전해질과 전고체전지 ··············································· 11
• 2.2.1 전고체전지 ··························································· 11
• 2.2.2 고체전해질 ··························································· 12
• 3. 실험방법 ···················································· 15
• 3.1 PSO(Particle Swarm Optimization) ··································· 15
• 3.1.1 PSO란 ································································ 15
• 3.1.2 고체전해질 이온전도도 최적화를 위한 PSO 변수 설정 ······· 17
• 3.2. 진공합성을 활용한 고체전해질 합성방법 ····························· 20
• 3.3. 셀 제작 방법 ·························································· 22
• 3.3.1 이온전도도 측정 셀 제작방법 ····································· 22
• 3.3.2 충/방전 half-cell 제작방법 ········································ 23
• 3.4. 고체전해질 소재 안정성 분석 ·········································· 25
• 3.4.1 수분안정성 측정 ···················································· 25
• 4. 결과 및 분석 ··············································· 26
• 4.1 PSO를 활용한 argyrodite 조성 및 공정조건 최적화 ················ 26
• 4.2 PSO를 활용한 multi-doping argyrodite 조성 최적화 ··············· 30
• 4.3 최적화 된 Multi-doping argyrodite XRD분석 ······················· 36
• 4.4 산소 doping에 따른 이온전도도 및 구조 분석 ······················· 39
• 4.5 Soild-state NMR을 통한 Li 분석 ······································ 43
• 4.6 Nyquist plot, Arrhenius plot, Activation energy ···················· 45
• 4.7 수분안정성의 측정 ······················································· 47
• 4.8 C-rate에 따른 방전특성 및 전기화학 분석 ··························· 51
• 5. 결론 ························································· 54
• 6. 참고문헌 ···················································· 55