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A Thermally Chargeable Hybrid Supercapacitor with High Power Density for Directly Converting Heat to Electricity
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-06-01 , DOI: 10.1021/acsaem.1c00905
Tingting Meng 1 , Yimin Xuan 1 , Xiaogang Zhang 2
Affiliation  

Electrical charging and discharging supercapacitors are well-known and invoke plenty of studies. There exist few publications on thermal-driven electrochemical reactions and storing devices, although such devices are in urgent need for efficiently utilizing waste heat and solar heat. In this work, we propose an innovative method of coupling electric double layer and ion intercalation approaches for developing a thermally chargeable hybrid supercapacitor (TCHS) with a high output power density, which can simultaneously convert heat from different available sources directly to electricity and store it in situ. The working principle of a TCHS is fully different from that of an electrically chargeable supercapacitor. We experimentally verify the feasibility of a TCHS. In the case that the developed device operates under a temperature difference of 50 °C, for example, it can generate a temperature coefficient of up to 12.1 mV K–1 and a maximum output power density of 20.4 W m–2, which is the highest level for a thermally chargeable supercapacitor at the moment. Such a device can realize the electric energy storage at the same time and overcome the instability and intermittent restriction of heat energy supply.

中文翻译:

一种具有高功率密度的可热充电混合超级电容器,用于将热能直接转换为电能

充电和放电超级电容器是众所周知的,并引起了大量研究。很少有关于热驱动电化学反应和存储设备的出版物,尽管这些设备迫切需要有效利用废热和太阳能。在这项工作中,我们提出了一种耦合双电层和离子嵌入方法的创新方法,用于开发具有高输出功率密度的可热充电混合超级电容器 (TCHS),该电容器可以同时将来自不同可用来源的热量直接转化为电能并将其存储原地。TCHS 的工作原理与可充电超级电容器的工作原理完全不同。我们通过实验验证了 TCHS 的可行性。–1和 20.4 W m –2的最大输出功率密度,这是目前可热充电超级电容器的最高水平。这种装置可以同时实现电能的储存,克服热能供应的不稳定性和间歇性限制。
更新日期:2021-06-28
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