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

• 来源期刊: 能源化学
• 年，卷（期）: 2020,（12）
• 页码范围: 182-189
• 页数: 8页
• 语种: 英文

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 cir-cumstances.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 effi-ciency of 79.5％ at 405 nm based on chloranilic acid and albendazole.Integrated with a microsuperca-pacitor,the chloranilic acid-albendazole complex(CAC)film prompts an apparent temperature increase of 22.7 ℃ under 1 sun illumination at-32.6 ℃,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 ℃in the open air,which demonstrates the potential of CAC in practical applications for low-temperature ultracapacitive energy-storage devices.