Abstract Here we report on an entirely new kind of bioelectronic device – a conventional biosupercapacitor, which is built from copper containing redox proteins. Prior to biodevice fabrication, detailed spectroelectrochemical studies of the protein, viz. Acidithiobacillus ferrooxidans rusticyanin, in solution and in adsorbed state, were performed, including estimation of the redox potential of the T1 site (0.62 V vs. NHE), protein midpoint potential when adsorbed on a self-assembled monolayer (0.34 V vs. NHE), as well as biocapacitance of rusticyanin modified gold electrodes (115 μF cm−2). The symmetrical biosupercapacitor based on two identical gold electrodes modified with rusticyanin is able to capacitively store electricity and deliver electric power accumulated mostly in the form of biopseudocapacitance, when charged and discharged externally. When charged during just 5 s, the biosupercapacitor with a total capacitance of about 73 μF cm−2 provided a maximum of 4 μA cm−2 peak current at 0.40 V. The biodevice, which can be charged and discharged at least 50 times without a significant loss of ability to store electric energy, had a low leakage current below 50 nA cm−2.

中文翻译：

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基于锈色素修饰金电极的传统对称生物超级电容器

摘要 在这里，我们报告了一种全新的生物电子设备——一种传统的生物超级电容器，它由含有氧化还原蛋白的铜制成。在生物设备制造之前，对蛋白质进行详细的光谱电化学研究，即。对溶液中和吸附状态下的酸性氧化亚铁硫杆菌 rusticyanin 进行了评估，包括估计 T1 位点的氧化还原电位（0.62 V 与 NHE）、吸附在自组装单层上时的蛋白质中点电位（0.34 V 与 NHE） ，以及 rusticyanin 修饰的金电极 (115 μF cm-2) 的生物电容。对称的生物超级电容器基于两个相同的金电极，用 rusticyanin 修饰，在外部充电和放电时，能够电容性地储存电能并以生物伪电容的形式提供主要积累的电能。