Highly efficient H-bonding charge-transfer complex for microsupercapacitors under extreme conditions of low temperatures  

作　　者：Libin Wang Ting Shu Songtao Guo Shi Chen Yingjun Jiang Xianluo Hu 

机构地区：[1]State Key Laboratory of Materials Processing and Die Sf Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China

出　　处：《Journal of Energy Chemistry》2020年第12期182-189,共8页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51772116 and 51972132);Program for HUST Academic Frontier Youth Team (2016QYTD04)。

摘　　要：Owing to sluggish ionic mobility at low temperatures, supercapacitors, as well as other energy-storage devices, always suffer from severe capacity decay and even failure under extreme low-temperature circumstances. Solar-thermal-enabled self-heating promises an attractive approach to overcome this issue.Here, we report a unique H-bonding charge-transfer complex with a high photothermal conversion efficiency of 79.5% at 405 nm based on chloranilic acid and albendazole. Integrated with a microsupercapacitor, the chloranilic acid-albendazole complex(CAC) film prompts an apparent temperature increase of 22.7 °C under 1 sun illumination at-32.6 °C, effectively elevating the working temperature of devices.As a result, the rate capability of the microsupercapacitor has been significantly improved with a 17-fold increase in capacitance at a current density of 60 μA cm^(-2), leading to outstanding low-temperature performances. Importantly, the integrated device is capable of working at a low temperature of-30 °C in the open air, which demonstrates the potential of CAC in practical applications for low-temperature ultracapacitive energy-storage devices.

关 键 词：Charge-transfer complexes Solar-thermal conversion Extreme conditions Microsupercapacitors Low temperature 

分 类 号：TM53[电气工程—电器] O641.4[理学—物理化学]