Skip to content

Development of Ni/Co/Mn/MWCNTs based Nanocomposites as Positive Electrode and Low cost ‘Green’ Carbon obtained from Bio-wastes as Negative Electrode Materials for Hybrid Supercapacitors

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

Asymmetric / Symmetric Supercapacitors were fabricated in the form of coin Transition metal oxides – Multiwalled carbon nanotubes nanocomposites as positive electrodes and activated carbon derived from biowaste as negative electrode materials were developed for high performance hybrid supercapacitors.

Positive Electrode material: Oxides of Ni, Co, Mn and mixed metal oxides with multiwalled carbon nanotubes

Negative material: Activated carbon derived from biowaste materials such as Musa Acuminata stem, Pongamia pinnata seed oil extract cake, Cajanus Cajan stem and Asclepias syriaca floss 

Electrolyte: Aqueous – KOH, Na2SO4, KCl, H2SO4

Salient Features/Advantages

  • The positive and negative materials developed in this project are of low cost, ecofriendly, chemically inert with high thermal stability as well as abundantly available in nature that can be utilized in fabricating coin cells, pouch cells and modules in aqueous inorganic electrolyte like KOH. This makes easy handling of the device
  • The fabricated coin cells were tested for their electrochemical performance in aqueous medium and proved to exhibit high capacitance, operating potential window, energy density, power density, cycle stability, low ESR and good life span
  • The fabricated coin cells were connected in series and used for various practical applications like powering LEDs, mini fan, Emergency lights depending on energy and power requirement

Key Outcomes

  • Parameter
  • Range of values obtained
  • Energy density : 40-60 Wh/kg
  • Power density : ~15- 20 kW/kg
  • Cycles : ~ Three lakhs
  • Columbic efficiency : >95
  • Operating voltage : 1.6 to 1.9 Volts
  • Capacitance retention More : than 85%
  • Self-Discharge decay rate : 50 mV/h after 24 h

  • Electrolyte KOH : (1-3M)

  • Performance of coin cells(CR2032)

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. Kathyayini Nagaraju
  • Email ID: nkathyayini45@gmail.com
  • Organisation name (Relevant link/web page): Centre for Incubation Innovation Research and Consultancy (CIIRC), Jyothy Institute of Technology, Bangalore
Supporting Photographs/Images

Organizations involved in the development (logo/name)

Centre for Incubation Innovation Research and Consultancy (CIIRC), Jyothy Institute of Technology, Bangalore

Scroll to Top