A peptide-based supercapacitor and its performance improvement via TiO2 coating
A peptide-based supercapacitor and its performance improvement via TiO2 coating
复制标题
肽基超级电容器及其通过 TiO2 涂层改进的性能
DOI：
10.1039/c8ta01102h
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发表时间：
2018-05-07
影响因子：
11.9
通讯作者：
Wang, Lu
中科院分区：
文献类型：
--
作者：
Hu, Kuan;Zheng, Chao;Wang, Lu
基于其自组装和模仿自然界中发生的策略的能力，肽纳米材料在环境友好的储能技术中提供了各种潜在的应用。在此，我们报告了一个精心设计的自组装二肽Fmoc-EF-NH 2的实验研究，它显示出良好的性能作为超级电容器的电极材料。为了保护肽电极不被电解质溶解，通过原子层沉积在肽膜上涂覆一薄层TiO 2。所制备的肽电极在0.1 A g−1电流密度下实现了125 F g−1的出色质量比电容和8.6 mF cm−2的面积电容。此外，该电容器表现出优异的稳定性，其中在5000次循环后保持95%的电容。此外，所制备的全固态SC具有优异的机械柔性。据我们所知，这是第一次全面评估肽材料的电化学性能的研究。
Based on their ability to self-assemble and mimic strategies that occur in nature, peptide nanomaterials offer a variety of potential applications in environmentally friendly energy storage technologies. Herein, we report the experimental investigations into an elaborate self-assembled dipeptide Fmoc-EF-NH2, which displayed good performance as an electrode material in a supercapacitor. In order to protect the peptide electrode from electrolyte dissolution, a thin layer of TiO2 was coated on the peptide film by atomic layer deposition. The as-prepared peptide electrodes achieved an outstanding mass-specific capacitance of 125 F g−1 at 0.1 A g−1 current density and an areal capacitance of 8.6 mF cm−2. Furthermore, the capacitor exhibits excellent stability, in that 95% of the capacitance was retained after 5000 cycles. Additionally, the fabricated all-solid-state SCs possess excellent mechanical flexibility. To the best of our knowledge, this is the first investigation that comprehensively assessed the electrochemical performance of peptide materials.