Development of Large Capacity Lead-Carbon Hybrid Ultracapacitors for Energy Storage

Abstract

Hybrid ultracapacitors (HUCs) are a new class of emerging electrochemical energy storage devices. Among various hybrid ultraultracapacitors, PbO2 Activated Carbon is an attractive system owing to its high cell voltage that provides it both high energy and power densities. In this project, we have designed and developed 12V / kF-range Lead-Carbon (LC) HUCs with absorbent-glass-mat (AGM) and silica-gel electrolyte configurations and tested their performance. The capacitance for the HUC in silica gel electrolyte configuration is found to be higher than AGM configuration because the enhancement of active surface area of positive plate and the effect of polymeric structure of silica gel on negative plate. The constant-power discharge curves show that lead-carbon HUCs have the capability to deliver energy as well as power for specified time duration. This dual feature of energy and power is a clear advantage of having a battery type electrode and a capacitor type electrode.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2012
Accession Number
ADA565958

Entities

People

  • Ashok K. Shukla

Organizations

  • Kendriya Vidyalaya, IISc Bangalore

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Capacitance
  • Capacitors
  • Chemistry
  • Electrochemical Energy Storage
  • Electrodes
  • Electrolytes
  • Energy
  • Energy Harvesting
  • Energy Storage
  • Frequency
  • Gels
  • Heart Rate
  • Impedance
  • Silica Gels
  • Silicon Dioxide
  • Storage
  • Supercapacitors

Readers

  • Battery Technology and Engineering
  • Electrical Engineering
  • Energy Conservation and Renewable Energy Engineering.