title: Flexible Asymmetrical Solid-State Supercapacitors Based on Laboratory Filter Paper.
abstract: In this study, a flexible asymmetrical all-solid-state supercapacitor with high electrochemical performance was fabricated with Ni/MnO2-filter paper (FP) as the positive electrode and Ni/active carbon (AC)-filter paper as negative electrode, separated with poly(vinyl alcohol) (PVA)-Na2SO4 electrolyte. A simple procedure, such as electroless plating, was introduced to prepare the Ni/MnO2-FP electrode on the conventional laboratory FP, combined with the subsequent step of electrodeposition. Electrochemical results show that the as-prepared electrodes display outstanding areal specific capacitance (1900 mF/cm(2) at 5 mV/s) and excellent cycling performance (85.1% retention after 1000 cycles at 20 mA/cm(2)). Such a flexible supercapacitor assembled asymmetrically in the solid state exhibits a large volume energy density (0.78 mWh/cm(3)) and superior flexibility under different bending conditions. It has been demonstrated that the supercapacitors could be used as a power source to drive a 3 V light-emitting diode indicator. This study may provide an available method for designing and fabricating flexible supercapacitors with high performance in the application of wearable and portable electronics based on easily available materials.
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science , Shenzhen 518055, China.|Shenzhen Key Laboratory of Special Functional Materials, College of Materials, Shenzhen University , Shenzhen 518060, China.
authors.forename: Leicong
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science , Shenzhen 518055, China.|Department of Electronics Engineering, The Chinese University of Hong Kong , Shatin, N.T., Hong Kong, China.
authors.forename: Pengli
authors.initials: P
authors.lastname: Zhu
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science , Shenzhen 518055, China.
authors.forename: Fengrui
authors.initials: F
authors.lastname: Zhou
authors.affiliation: School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications , Nanjing 210003, China.
authors.forename: Wenjin
authors.initials: W
authors.lastname: Zeng
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science , Shenzhen 518055, China.
authors.forename: Haibo
authors.initials: H
authors.lastname: Su
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science , Shenzhen 518055, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory of Special Functional Materials, College of Materials, Shenzhen University , Shenzhen 518060, China.
authors.forename: Jihua
authors.initials: J
authors.lastname: Gao
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science , Shenzhen 518055, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Sun
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.|Department of Electronics Engineering, The Chinese University of Hong Kong , Shatin, N.T., Hong Kong, China.
authors.forename: Ching-Ping
authors.initials: CP
authors.lastname: Wong
mesh_terms: D025802:Electric Capacitance; D011211:Electric Power Supplies; D055664:Electrochemical Techniques; D004566:Electrodes; D017895:Manganese Compounds / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010209:Paper; D011142:Polyvinyl Alcohol / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D013431:Sulfates; C012036:sodium sulfate; C547128:nickel dioxide; D009532:Nickel; D011142:Polyvinyl Alcohol; C016552:manganese dioxide
keywords: MnO2; electroless plating; filter paper; flexible supercapacitor; polymer electrolyte