Recent researches in the development of in-plane micro-supercapacitor(MSC)have been dedicated to advancing its energy density in a finite storage area.However,the low ion-accessible surface area of plane electrode mat...Recent researches in the development of in-plane micro-supercapacitor(MSC)have been dedicated to advancing its energy density in a finite storage area.However,the low ion-accessible surface area of plane electrode material has been the bottleneck limiting the energy output of MSC.Herein,we design a stable ionic liquid(IL)-MXene microemulsion system in virtue of tween-20(TW20),gathering IL-TW20 microdroplets around MXene nanosheets.The microemulsion can adhere on the current collector and form the dense MXene-TW20-IL film.The IL as spacer and electrolyte is retained in the interlamination of MXene with the elimination of the TW20 during heat treatment,which enlarges the ion-accessible surface area of the MXene electrode.Thus,the MSC based on the flexible MXene-IL film exhibits a high areal capacitance(44.6 mF·cm^(−2)),a high areal and volumetric energy density(50.7μW·h·cm^(−2)and 39 mW·h·cm^(−3)),surpassing most of the reported MXene-based MSCs.And the MSC unit can be arbitrarily integrated in terms of various energy and voltage requirements.For instance,the integrated array with thirty MSC units in series realizes a high voltage output of 90 V,widening the range of application in next-generation microelectronic devices.展开更多
基金the financial support from the National Natural Science Foundation of China(Nos.22005168 and 21878063)the Taishan Scholars Program of Shandong Province(No.tsqn201909119)+2 种基金the Natural Science Foundation of Shandong Province(No.ZR2020QB118)the Key Program of Natural Science Foundation of Shandong Province(No.ZR2020KB011)the Talent Foundation funded by Province and Ministry Coconstruction Collaborative Innovation Center of Eco-chemical Engineering(No.STHGYX2219).
文摘Recent researches in the development of in-plane micro-supercapacitor(MSC)have been dedicated to advancing its energy density in a finite storage area.However,the low ion-accessible surface area of plane electrode material has been the bottleneck limiting the energy output of MSC.Herein,we design a stable ionic liquid(IL)-MXene microemulsion system in virtue of tween-20(TW20),gathering IL-TW20 microdroplets around MXene nanosheets.The microemulsion can adhere on the current collector and form the dense MXene-TW20-IL film.The IL as spacer and electrolyte is retained in the interlamination of MXene with the elimination of the TW20 during heat treatment,which enlarges the ion-accessible surface area of the MXene electrode.Thus,the MSC based on the flexible MXene-IL film exhibits a high areal capacitance(44.6 mF·cm^(−2)),a high areal and volumetric energy density(50.7μW·h·cm^(−2)and 39 mW·h·cm^(−3)),surpassing most of the reported MXene-based MSCs.And the MSC unit can be arbitrarily integrated in terms of various energy and voltage requirements.For instance,the integrated array with thirty MSC units in series realizes a high voltage output of 90 V,widening the range of application in next-generation microelectronic devices.
