KR102028362B1 - 가넷형 산화물 고체 전해질의 제조 방법 - Google Patents
가넷형 산화물 고체 전해질의 제조 방법 Download PDFInfo
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Abstract
(해결 수단) 일반식 (Lia1, Aa2)La3-bEbZr2-cMcO12 (5 < a1 < 7, 0 ≤ a2 ≤ 0.2, 0 ≤ b ≤ 1, 0.125 ≤ c ≤ 0.6) 로 나타내는 가넷형 산화물 고체 전해질의 제조 방법으로서, 상기 일반식의 화학량론비가 되도록 상기 가넷형 산화물 고체 전해질의 원료를 준비하는 공정과, 플럭스 원료로서 NaCl 및 KCl 을 사용하고, 당해 플럭스 원료의 몰비를 NaCl:KCl = x:(1-x) 로 나타냈을 때에, x 가 0 ≤ x ≤ 1 의 범위가 되도록 당해 플럭스 원료를 준비하는 공정과, 상기 공정에서 준비한 고체 전해질 원료와 상기 공정에서 준비한 플럭스 원료를 혼합하는 공정과, 상기 고체 전해질 원료와 플럭스 원료의 혼합물을 1100 ℃ 미만의 온도에서 가열하는 공정을 갖는 가넷형 산화물 고체 전해질의 제조 방법.
(상기 일반식 중, A 는 Al 및 Ga 에서 선택되는 적어도 1 종의 원소를 나타내고, E 는 Ca 및 Sr 에서 선택되는 적어도 1 종의 원소를 나타내고, M 은 Nb 및 Ta 에서 선택되는 적어도 1 종의 원소를 나타낸다)
Description
도 2 는 실시예 2 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 3 은 실시예 3 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 4 는 실시예 4 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 5 는 실시예 5 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 6 은 실시예 6 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 7 은 실시예 7 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 8 은 실시예 8 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 9 는 실시예 9 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 10 은 실시예 10 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 11 은 비교예 1 의 제조 방법으로 얻어진 가넷형 산화물 고체 전해질의 XRD 스펙트럼이다.
도 12 는 가넷형 산화물 고체 전해질의 조성과 Li 이온 전도율의 관계를 나타낸 그래프이다.
Claims (4)
- 일반식 (Lia1, Aa2)La3-bEbZr2-cMcO12 (5 < a1 < 7, 0 ≤ a2 ≤ 0.2, 0 ≤ b ≤ 1, 0.125 ≤ c ≤ 0.6) 로 나타내는 가넷형 산화물 고체 전해질의 제조 방법으로서,
상기 일반식의 화학량론비가 되도록 상기 가넷형 산화물 고체 전해질의 원료를 준비하는 공정과,
NaCl 및 KCl 중 선택되는 하나 이상으로 이루어지는 플럭스 원료로서, 당해 플럭스 원료의 몰비를 NaCl:KCl = x:(1-x) 로 나타냈을 때에, x 가 0 ≤ x ≤ 1 의 범위가 되도록 당해 플럭스 원료를 준비하는 공정과,
상기 공정에서 준비한 고체 전해질 원료와 상기 공정에서 준비한 플럭스 원료를 혼합하는 공정과,
상기 고체 전해질 원료와 플럭스 원료의 혼합물을 1100 ℃ 미만의 온도에서 가열하는 공정을 갖는, 가넷형 산화물 고체 전해질의 제조 방법.
(상기 일반식 중, A 는 Al 및 Ga 에서 선택되는 적어도 1 종의 원소를 나타내고, E 는 Ca 및 Sr 에서 선택되는 적어도 1 종의 원소를 나타내고, M 은 Nb 및 Ta 에서 선택되는 적어도 1 종의 원소를 나타낸다) - 제 1 항에 있어서,
상기 x 가 0 ≤ x < 1 의 범위인 것을 특징으로 하는 가넷형 산화물 고체 전해질의 제조 방법. - 제 2 항에 있어서,
상기 x 가 0.1 ≤ x ≤ 0.8 의 범위인 것을 특징으로 하는 가넷형 산화물 고체 전해질의 제조 방법. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
상기 가열 공정에 있어서, 합성 완료 후의 용해된 혼합물 중에 있어서의 상기 고체 전해질의 ㏖ 농도의 이론값이 2.5 ㏖/ℓ 이하가 되도록, 상기 고체 전해질 원료와 상기 플럭스 원료를 혼합하는 것을 특징으로 하는 가넷형 산화물 고체 전해질의 제조 방법.
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