Harnessing energy from the environment promotes the rapid development of micro-power generators and relevant power management modules of alternating current(AC)line-filtering to obtain a stabilized direct current(DC)output for storage and use.Micro-supercapacitors(MSCs)with miniaturized volume and high-frequency response are regarded as a critical component in filtering circuits for microscale power conversion.Here,we reported the fabrication of the wafer-sized planar MSCs(M-MSCs)based on 2D Ti3C2Tx MXene using a photolithography technique.The M-MSCs exhibited an areal capacitance of 153 μF cm-2 and a frequency characteristic(f0)of 5.6 kHz in aqueous electrolyte.Moreover,by employing suitable ionic liquid as electrolyte,the voltage window was expanded to 2 V and the f0 could be pushed to 6.6 kHz relying on the electrical double-layer mechanism and lower adsorption energy while maintaining quasi-rectangular cyclic voltammogram curves at 5000 V s-1.Furthermore,the inte-grated MSCs pack was constructed and exhibited excellent rectifying ability by filtering various high-frequency 5000 Hz AC signals with different waveforms into stable DC outputs.Such ultrahigh-rate and high-voltage M-MSCs module for kHz AC line-filtering would be potentially integrated with cus-tomizable electronics to realize on-chip rectifiers in high-density integrated circuit.

Xin Feng;Sen Wang;Pratteek Das;Xiaoyu Shi;Shuanghao Zheng;Feng Zhou;Jing Ning;Dong Wang;Jincheng Zhang;Yue Hao;Zhong-Shuai Wu

Guangzhou Wide Bandgap Semiconductor Innovation Center,Xidian University,Xi'an 710071,Shaanxi,China;State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China;State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology,Xidian University,Xi'an 710071,Shaanxi,China;Shaanxi Joint Key Laboratory of Graphene,Xidian University,Xi'an 710071,Shaanxi,China;Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian 116023,Liaoning,China;Xidian-Wuhu Research Institute,Wuhu 241000,Anhui,China

能源化学

[1]Xin Feng;Sen Wang;Pratteek Das;Xiaoyu Shi;Shuanghao Zheng;Feng Zhou;Jing Ning;Dong Wang;Jincheng Zhang;Yue Hao;Zhong-Shuai Wu-.Ultrahigh-rate and high-frequency MXene micro-supercapacitors for kHz AC line-filtering)[J].能源化学,2022(06):1-8

photolithography,voltammogram,tomizable,rectifiers

Ultrahigh,frequency,MXene,supercapacitors,kHz,AC,line,filtering,Harnessing,energy,from,environment,promotes,rapid,development,power,generators,relevant,management,modules,alternating,current,obtain,stabilized,direct,DC,storage,use,Micro,MSCs,miniaturized,volume,response,regarded,critical,component,circuits,microscale,conversion,Here,reported,fabrication,wafer,sized,planar,2D,Ti3C2Tx,using,technique,exhibited,areal,capacitance,characteristic,f0,aqueous,electrolyte,Moreover,by,employing,suitable,ionic,liquid,voltage,window,was,expanded,could,be,pushed,relying,electrical,double,layer,mechanism,lower,adsorption,while,maintaining,quasi,rectangular,cyclic,curves,Furthermore,pack,constructed,excellent,rectifying,ability,various,signals,different,waveforms,into,stable,outputs,Such,ultrahigh,would,potentially,integrated,cus,electronics,realize,chip,density

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