Mohammed Saquib Khan, Preeti Shakya, N. Bhardwaj, Deependra Jhankal, A. Sharma, M. K. Banerjee, K. Sachdev
{"title":"Chemical vapor deposited graphene-based quasi-solid-state ultrathin and flexible sodium-ion supercapacitor","authors":"Mohammed Saquib Khan, Preeti Shakya, N. Bhardwaj, Deependra Jhankal, A. Sharma, M. K. Banerjee, K. Sachdev","doi":"10.5599/jese.1411","DOIUrl":null,"url":null,"abstract":"Flexible electronic devices find wide application in wearable electronics and foldable gadgets. This article reports chemical vapor deposited (CVD) few-layers graphene for a solid-state flexible supercapacitor device. Raman spectroscopy analysis reveals up to five layers in the graphene samples. Polyvinyl alcohol-Na2SO4 hydrogel membrane is used as a gel polymer electrolyte (GPE). 50 nm thick silver (Ag) deposited on polyethylene terephthalate (PET) through E-beam deposition served as the flexible current collector for the device. Galvanostatic charge-discharge (GCD) executed on the fabricated device to analyze its electrochemical performance yielded a specific areal capacitance of 15.3 mF cm-2 at 0.05 mA cm-2 current density. The obtained power density of the fabricated device is 0.53 µWh cm-2 at a power density of 25 µW cm-2.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"29 1","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2022-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electrochemical Science and Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5599/jese.1411","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
引用次数: 1
Abstract
Flexible electronic devices find wide application in wearable electronics and foldable gadgets. This article reports chemical vapor deposited (CVD) few-layers graphene for a solid-state flexible supercapacitor device. Raman spectroscopy analysis reveals up to five layers in the graphene samples. Polyvinyl alcohol-Na2SO4 hydrogel membrane is used as a gel polymer electrolyte (GPE). 50 nm thick silver (Ag) deposited on polyethylene terephthalate (PET) through E-beam deposition served as the flexible current collector for the device. Galvanostatic charge-discharge (GCD) executed on the fabricated device to analyze its electrochemical performance yielded a specific areal capacitance of 15.3 mF cm-2 at 0.05 mA cm-2 current density. The obtained power density of the fabricated device is 0.53 µWh cm-2 at a power density of 25 µW cm-2.
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