Ultra-flexible all-in-one anti-freeze photothermally enhanced supercapacitors  

作　　者：Yongxin Lu Keke Li Yan-Yan Song Zhida Gao 

机构地区：[1]Condense matter of physics,College of Science,Northeazistern University,Shenyang 110004,China

出　　处：《Nano Research》2024年第8期7221-7229,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22374015 and 22074013);the Fundamental Research Funds for the Central Universities(No.N232410019).

摘　　要：Wearable electronics powered by flexible energy storage devices have captured global attention.Under low-temperature conditions,unfortunately,solidification of flexible hydrogel electrolyte and decreased pseudo-capacity of these devices largely hamper their practical use.In this study,photothermally-active Prussian blue(PB)was introduced onto poly(3,4-ethylenedioxythiophene)/polyacrylamide(PEDOT/PAM)networks to address the challenges of electrolyte solidification and degraded pseudo-capacitance for flexible all-in-one device at low temperatures.The as-constructed PB/PEDOT/PAM hydrogel device delivers stable electrochemical performance and remarkable mechanical property with 1652%elongation.Importantly,this hydrogel device well retains its flexibility in cold environment with a freezing point below−30℃.The incorporation of PB extends the voltage range to 1.5 V as a single device,thus significantly enhancing the electrochemical performance as an all-inone integrated device.Benefitting from the outstanding photo-to-thermal conversion ability of embedded PB nanocubes,the temperature of the assembled all-in-one PB/PEDOT/PAM device increased from^(−2)0 to 17.7℃ after solar-light irradiation for only 5 min.Moreover,the degraded pseudo-capacitance was subsequently boosted to 287.1%of its original capacitance at−20℃.This study establishes a connection between flexible all-solid-state hydrogel devices and photothermally enhanced pseudocapacitors in freezing environments,thereby expanding the potential applications of multi-functional pseudo-capacitors.

关 键 词：ALL-IN-ONE energy storage devices ALL-SOLID-STATE PHOTOTHERMAL flexible low temperatures 

分 类 号：TM53[电气工程—电器]