Abstract
리튬금속을 음전극으로 사용할 때의 안전성과 전극 특성을 개선하기 위해, 리튬금속 표면에 각기 종류가 다른 3가지의 탄소분말을 리튬금속 표면에 물리적으로 코팅한 전극을 제조하고 이를 리튬 2차전지의 음전극으로 채택하여 충방전 특성을 조사하였다. 일차입자의 입경이 작고 비표면적이 큰 탄소분말로 코팅한 음전극을 채택하는 경우가 충진밀도가 높고 표면 거칠기가 낮으며, 충방전 특성도 우수하게 나타났다. 이러한 탄소분말 코팅 효과는 소형 셀일수록 더욱 유리하게 나타났다. To improve the safety and electrode characteristics of lithium metal anode, physically coated electrodes on lithium metal surface by three kinds of carbon are prepared and their charge-discharge performances are investigated by adopting the C-Li electrodes as the anode of rechargeable lithium batteries. The lithium anode coated by the carbon powder with smaller particle size and higher surface area, which has higher packing density and lower surface roughness, shows better performance in charge-discharge characteristics. The carbon coating on lithium surface can be more effective in small-sized cells.
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