건식 진동밀을 이용한 나트륨이온전지 양극활물질 합성
Synthesis of cathode material for sodium ion batteries using dry vibration milling
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건식 진동밀과 습식 볼밀로 출발원료를 혼합/분쇄하여 나트륨이온전지용 양극활물질인 Na2/3(Ni1/3Mn2/3)O2를 합성하여 특성을 비교하였다. 건식 진동밀로 혼합/분쇄한 분말은 습식 볼밀한 분말보다 더 미세한 1 μm 이하의 입자였으며, 875~900 o C에서 열처리 하였을 때 단일상을 얻을 수 있었다. 또한 전지 특성도 건식 진동밀을 사용한 분말이 습식 공정으로합성한 분말보다 방전용량이 크고 방전 전위도 높게 나왔다.
Abstract
Two milling methods, dry vibration milling and wet ball milling, were used to prepare Na2/3(Ni1/3Mn2/3)O2 powders as a cathode material for sodium ion batteries. The morphology and electrochemical property of the two powders with different milling processes were compared to each other. The particle size is less than 1 μm in the dry vibration milled powder, while lots of larger particles than 1 μm were found in the wet ball milled one. The single phase of Na2/3(Ni1/3Mn2/3)O2 was obtained in the temperature range of 875~900 o C. The discharge capacity and discharge voltage of the powder prepared by the dry process were higher than those of one prepared by the wet process.
참고문헌 (10)
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