Sustainable power generation via hydro-electrochemical effects
Sustainable power generation via hydro-electrochemical effects
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DOI：
10.1039/d1nr07748a
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发表时间：
2022-02-09
期刊：
影响因子：
6.7
通讯作者：
Yu, Choongho
中科院分区：
文献类型：
--
作者：
Sohn, Ahrum;Zhang, Yufan;Yu, Choongho
最近，利用环保方法和丰富的水资源进行能源回收的努力，在为可穿戴设备和分布式电子产品供电方面前景看好。然而，发电的持续时间通常太短，尽管电压相对较大，但电流水平不足以满足电子设备正常运行所需的阈值。本文提出了一种结合水力效应的电化学方法，以延长能量清除时间，提高电流。我们的装置由腐蚀的多孔钢电极组成，其腐蚀过电位随着水浓度的增加而降低，反之亦然。然后在两个电极之间产生电位差，通过氢电化学方法产生高达750 mV开路电压和90 μ a cm（-2）的短路电流。此外，通过缓慢的水在底部电极的重力作用下扩散，连续发电超过1500分钟。最后，我们证明了我们的水力电化学发电机成功地运行了电子设备，显示了在实践中提供足够长时间电力的可行性。
Recent efforts towards energy scavenging with eco-friendly methods and abundant water look very promising for powering wearables and distributed electronics. However, the time duration of electricity generation is typically too short, and the current level is not sufficient to meet the required threshold for the proper operation of electronics despite the relatively large voltage. This work newly introduced an electrochemical method in combination with hydro-effects in order to extend the energy scavenging time and boost the current. Our device consists of corroded porous steel electrodes whose corrosion overpotential was lowered when the water concentration was increased and vice versa. Then a potential difference was created between two electrodes, generating electricity via the hydro-electrochemical method up to an open-circuit voltage of 750 mV and a short-circuit current of 90 mu A cm(-2). Furthermore, electricity was continuously generated for more than 1500 minutes by slow water diffusion against gravity from the bottom electrode. Lastly, we demonstrated that our hydro-electrochemical power generators successfully operated electronics, showing the feasibility of offering electrical power for sufficiently long time periods in practice.