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FLEXIBLE SOLID-STATE SUPERCAPACITORDEVICE

Subcategory (under Clean Energy): Cross Cutting
Technology Readiness Level (TRL): TRL 4 - Early prototype
Technology Outline (Process Description)

Flexible solid-state supercapacitors: SS/MWCNTs/MX //(Gel-PVA+ Conducting Electrolyte)//MX/MWCNTs/SS:

Use of flexible conductive stainless steel (SS) substrates

Coating of commercially available MWCNTs (EDLC) by ‘Dip and dry’ coating at room temperature

Use of chemical bath deposition to anchor V2O5 (pseudo capacitive) on SS/MWCNTs

Gel formation by using conducting electrolyte (NaClO4) with non-conducting polymer (PVA) and coating onSS/ MWCNTs/V2O5 electrodes

Symmetric deviceformation with configuration SS/MWCNTs/V2O5// (PVA+ NaClO4) //V2O5/MWCNTs/SS followed by applied pressure and complete drying

Solid-state supercapacitor testing through electrochemical tests (CV, GCD, EIS, stability, etc.). and formation of three devices in series to achieve 5.5V potential and to evaluate capacitance and cycling stability

Salient Features/Advantages

  • Designed and developed flexible solid-state supercapacitor based on dual charge mechanisms (EDLC+pseudo) in symmetric configuration using SS/MWCNTs/V2O5 electrodes and PVA+NaClO4 gel Use of industry scalable chemical method to form electrode materials
  • Showed functioning model to run 21 red LEDs and tiny fan using formed solid-state supercapacitor device

Key Outcomes

  • Supercapacitor (Area 3.5 x 4.8 cm2-3 devices of 2.0V potential window in series with configuration SS/MWCNTs/V2O5// (PVA+NaClO4)//V2O5/MWCNTs/SS)
  • Rated working Voltage-5.5V (Potential Window) Capacitance-45 mF by CD @1.96 A/g (Using mass of active material)
  • 42.1 mF by ESR meter (As a whole device)
  • Resultant Impedance-580 m.ohm by EIS (350 m.ohm by ESR)
  • Stability of 5.5V Device-84% @ 2000 cycles

IP Protection details

  • Patent filed (Title, national/International): Nil
  • Patents Granted: Nil
  • Copyrights obtained /progress on commercialisation /Pl. specify connect with industry: Nil

Contact details (for more information)

  • Nodal Person name: Dr. Babasaheb R. Sankapal
  • Email ID: brsankapal@phy.vnit.ac.in
  • Organisation name (Relevant link/web page): Visvesvaraya National Institute of Technology (VNIT), Nagpur
Supporting Photographs/Images

Organizations involved in the development (logo/name)

Visvesvaraya National Institute of Technology (VNIT), Nagpur

Centre For Materials For Electronics Technology (C-MET), Pune

SPEL TECHNOLOGIES PVT LTD Pune

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