本實驗研究了無負極薄膜電池，結構為Cu/Lipon(lithium phosphorus oxynitride)/LiCoO2，鋰金屬會在充電時從Cu/Lipon界面析出。Cu/Lipon界面非常穩定，沒有化學以及結構變化。掃描式電子顯微鏡觀察結果指出Cu表面形構與電池的性能有密切的關係。以較低的LiCoO2退火溫度以及較慢的Lipon鍍率可以使Cu表面較為平整。以0.5 mA/cm2放電，電容量在經過80個週期之後下降25 %。以遞增小電壓進行初次充電可以增加鋰金屬析出的成核密度，但是同時會使Cu表面破裂。

Anode-free thin film battery with configuration Cu/Lipon/LiCoO2 was investigated. The battery was activated by the plating of metallic Li at the Cu current collector during the initial charge. Cu/Lipon interface is very stable, neither chemical nor structural transformation was found. Cu surface morphology is vital for cycle stability as observed by scanning electron microscopy. Flat Cu surface came along with low annealing temperature of LiCoO2 and low deposition rate of Lipon. Less than 25 % capacity drop is demonstrated over 80 electrochemical cycles at 0.5 mA/cm2. Initial charge with small step voltage could increase the nucleation density of metallic Li but also cause the break of Cu surface.

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