Thermally Chargeable Ammonium-Ion Capacitor for Energy Storage and Low-Grade Heat Harvesting

被引：21

作者：

An, Yufeng ^{[1
]}

Li, Zhiwei ^{[1
]}

Sun, Yao ^{[1
]}

Li, Shaopeng ^{[1
]}

Xu, Yinghong ^{[1
]}

Dou, Hui ^{[1
]}

Zhang, Xiaogang ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Jiangsu Key Lab Electrochem Energy Storage Techno, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

来源：

BATTERIES & SUPERCAPS | 2022年 / 5卷 / 06期

基金：

中国国家自然科学基金;

关键词：

capacitors; low-grade heat; redox-active effect; thermal chargeability; thermogalvanic; WASTE HEAT; POWER; SUPERCAPACITORS; BATTERIES; SYSTEMS; CARBON;

D O I：

10.1002/batt.202200036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Harvesting heat from the low-grade heat (below 100 degrees C) into electricity has the signification to enhance the utilization of energy and lower carbon emissions by a simple device. Herein we demonstrate a thermally chargeable ammonium ion capacitor (TAIC) by employing graphene-polyimide (rGO-PI) synthesized through polycondensation of 1,4,5,8-naphthalene-tetracarboxylic dianhydride and ethylenediamine as cold electrode, N-doped hollow carbon nanofibers as hot electrode to directly convert waste heat into electricity. Combining thermodiffusion effect of electrolyte with thermogalvanic effect of a redox couple (C=O/C-O-NH4+), as-assembled TAIC can deliver a high output voltage of 624 mV, power density of 82 mu Wcm(-2) and average Seebeck coefficient of 9.07 mVK(-1) at temperature difference of 45 K. Meanwhile, with the introduction of polyacrylamide-polyacrylic acid-based gel electrolyte, the assembled flexible device can well serve in various bending states, and the power density can attain a satisfying value of 1.92 mu Wcm(-2). This quasi-solid-state TAIC shows great potential as one promising candidate for high value-added conversion from low-grade heat into electricity as well as wearable applications.

引用

页数：10

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