Anodized Ti3SiC2 As an Anode Material for Li-ion Microbatteries

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• 作者：Alexander T. Tesfaye ; Olha Mashtalir ; Michael Naguib ; Michel W. Barsoum ; Yury Gogotsi ; Thierry Djenizian
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 6, 2016
• 年：2016
• 卷：8
• 期：26
• 页码：16670-16676
• 全文大小：473K
• 年卷期：0
• ISSN：1944-8252

文摘

We report on the synthesis of an anode material for Li-ion batteries by anodization of a common MAX phase, Ti₃SiC₂, in an aqueous electrolyte containing hydrofluoric acid (HF). The anodization led to the formation of a porous film containing anatase, a small quantity of free carbon, and silica. By varying the anodization parameters, various oxide morphologies were produced. The highest areal capacity was achieved by anodization at 60 V in an aqueous electrolyte containing 0.1 v/v HF for 3 h at room temperature. After 140 cycles performed at multiple applied current densities, an areal capacity of 380 μAh·cm^–2 (200 μA·cm^–2) has been obtained, making this new material, free of additives and binders, a promising candidate as a negative electrode for Li-ion microbatteries.