Deformable micro-supercapacitor fabricated via laser ablation patterning of Graphene/liquid metal  

作　　者：Keon-Woo Kim Seong Ju Park Su-Jeong Park Inae Kim Bomi Park Se Hyun Kim Unyong Jeong Jin Kon Kim Chanwoo Yang 

机构地区：[1]National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer,Department of Chemical Engineering,Pohang University of Science and Technology(POSTECH),Pohang,Gyeongbuk 37763,Republic of Korea [2]Advanced Nano-Surface&Wearable Electronics Research Laboratory,Heat and Surface Technology R&D Department,Korea Institute of Industrial Technology,Incheon 21999,Republic of Korea [3]Division of Chemical Engineering,Konkuk University,Seoul 05029,Republic of Korea [4]Department of Materials Science and Engineering,Pohang University of Science and Technology(POSTECH),Pohang,Gyeongbuk 37763,Republic of Korea

出　　处：《npj Flexible Electronics》2024年第1期770-778,共9页npj-柔性电子(英文)

基　　金：supported by the Industry-leading Core Production Technology Development Project of the Korea Institute of Industrial Technology(KITECH),and granted financial resources from the Ministry of Economy and Finance,Republic of Korea(No.EO240009);supported by the National Creative Research Initiative Program supported by the National Research Foundation of Korea(NRF)grant(no.2022R1A3A3002149)funded by the Korean government.

摘　　要：Deformable andminiaturized energy storage devices are essential for powering soft electronics.Herein,we fabricate deformablemicro supercapacitors(MSCs)based on eutectic gallium-indium liquidmetal(EGaIn)current collectors with integrated graphene.The well-define interdigitated electrode patterning with controlled gap is successfully realized by using the laser ablation because of a strong laser absorption of graphene and EGaIn.By judicious control of gap size between neighboring interdigitated electrodes and mass loading of graphene,we achieve a high areal capacitance(1336μF cm^(−2))with reliable rate performance.In addition,owing to the intrinsic liquid characteristics of EGaIn current collector,the areal capacitance of fabricated MSC retains 90% of original value evenafter repetitive foldingand20%stretching up to 1000 cycles.Finally,we successfully integrate deformable MSC with a commercial light-emitting diode to demonstrate the feasibility ofMSC as a deformable power source.The fabricated MSCs operate stably under various mechanical deformations,including stretching,folding,twisting,and wrinkling.

关 键 词：LASER STRETCHING LIQUID 

分 类 号：TN3[电子电信—物理电子学]