Ag-ion-modified titanium nanotube (Ag/TiO2-NT) arrays were designed and fabricated as the electrode material of supercapacitors for electrochemical energy storage. TiO2 nanotube (NT) arrays were prepared by electrochemical anodic oxidation and then treated by Ag metal vapor vacuum arc (MEVVA) implantation. The Ag amount was controlled via adjusting ion implantation parameters. The morphology, crystallinity, and electrochemistry properties of as-obtained Ag/TiO2-NT electrodes were distinguished based on various characterizations. Compared with different doses of Ag/TiO2-NTs, the electrode with the dose of 5.0 × 1017 ions·cm−2 exhibited much higher electrode capacity and greatly enhanced activity in comparison to the pure TiO2-NTs. The modified electrode showed a high capacitance of 9324.6 mF·cm−3 (86.9 mF·g, 1.2 mF·cm−2), energy density of 82.8 μWh·cm−3 (0.8 μWh·g, 0.0103 μWh·cm−2), and power density of 161.0 mW·cm−3 (150.4 μW·g, 2.00 μW·cm−2) at the current density of 0.05 mA. Therefore, Ag/TiO2-NTs could act as a feasible electrode material of supercapacitors.

中文翻译：

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Ag/TiO2纳米阵列复合结构的表面特性对超级电容器电极性能的影响

设计并制备了银离子修饰的钛纳米管（Ag/TiO2-NT）阵列作为电化学储能超级电容器的电极材料。通过电化学阳极氧化制备TiO2纳米管（NT）阵列，然后通过Ag金属蒸气真空电弧（MEVVA）注入处理。通过调整离子注入参数来控制Ag的量。根据各种表征，对所获得的 Ag/TiO2-NT 电极的形貌、结晶度和电化学性能进行了区分。与不同剂量的Ag/TiO2-NTs相比，剂量为5.0×1017ions·cm−2的电极比纯TiO2-NTs表现出更高的电极容量和大大增强的活性。修饰电极表现出9324.6 mF·cm−3（86.9 mF·g，1.2 mF·cm−2）的高电容，能量密度为82.8 μWh·cm−3（0.8 μWh·g，0.0103 μWh·cm−2） ，在电流密度为0.05 mA时，功率密度为161.0 mW·cm−3（150.4 μW·g，2.00 μW·cm−2）。因此，Ag/TiO2-NTs可以作为超级电容器的可行电极材料。