原子层沉积氧化铝包覆层增强五氧化二钒多孔薄膜电化学循环稳定性
Enhanced Electrochemical Stability Induced by Atomic Layer Deposition of Al2O3 Coatings on V2O5 porous Film
最近，包覆氧化物进行表面修饰的方法已成功应用于改善锂离子电池阴极材料的容量稳定性。本文中，通过在溶胶提拉法制备了V2O5多孔薄膜，并利用原子层沉积法对其包覆Al2O3原子层。V2O5多孔薄膜的电化学性质受包覆层厚度的影响，我们研究了不同薄膜厚度下的修饰效果。结果显示，原子层沉积法包覆不同厚度Al2O3原子层对锂离子电池的循环稳定性都有所改善，10个Al2O3原子层的包覆表现出最好的修饰效果。在此基础上，我们讨论探索了包覆Al2O3对容量及稳定性增强的机理。
Very recently, surface modification by coating oxides has been successfully applied to improve the stability of capacity of cathode materials for rechargeable lithium-ion batteries. In this article, we prepared V2O5 porous films by dip-coating method with V2O5 sol. The electrochemical performance of V2O5 porous films affected by film thickness, we systematically compared the modification effect of surface Al2O3 coating via atomic layer deposition (ALD). Results revealed that different thickness of the Al2O3 coating via ALD can improve the rechargeable stability. And the film deposited by 10 atomic layers of Al2O3 exhibited the best cyclic stability. On this basis we further discussed the mechanism of the stability and capacity enhancement aroused from Al2O3 depositions.
曾燚、杨辉宇、高国华、吴广明
能源动力工业经济物理学化学
凝聚态物理学五氧化二钒薄膜原子层沉积法表面修饰循环稳定性
ondensed matter physicsVanadium Pentoxide filmAtomic layer depositionSurface modificationCycling stability
曾燚,杨辉宇,高国华,吴广明.原子层沉积氧化铝包覆层增强五氧化二钒多孔薄膜电化学循环稳定性[EB/OL].(2014-02-26)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201402-519.点此复制
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