Jump to main content
Jump to site search

Issue 12, 2018
Previous Article Next Article

Large electrocaloric response and energy storage study in environmentally friendly (1 − x)K0.5Na0.5NbO3xLaNbO3 nanocrystalline ceramics

Author affiliations

Abstract

An electrocaloric material with a negative and positive electrocaloric effect (ECE) is identified to be a high potential candidate for solid-state refrigeration technology due to a changing dipolar entropy under a varying electric field. We have experimentally observed large values of negative and positive electrocaloric (EC) response in environmentally friendly (1 − x)K0.5Na0.5NbO3xLaNbO3 ceramics using Maxwell’s relationships. The maximum value of negative and positive ECE were found to be −0.88 K and 2.08 K at 50 kV cm−1 for x = 0.03. The material displays a high electrocaloric responsivity (−1.76 and 4.16 × 10−7 K m V−1 for negative and positive ECE, respectively), COP (4.16) and energy storage capacity (0.17 J cm−3) for x = 0.03. The large values of negative and positive ECE, high values of electrocaloric responsivity, COP and energy storage capacity make this compound a good candidate for electrocaloric refrigeration and high energy storage applications. The Olsen cycle is discussed to explain the process involved in using this material for electrocaloric refrigeration.

Graphical abstract: Large electrocaloric response and energy storage study in environmentally friendly (1 − x)K0.5Na0.5NbO3–xLaNbO3 nanocrystalline ceramics

Back to tab navigation

Publication details

The article was received on 13 Jun 2018, accepted on 09 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8SE00276B
Citation: Sustainable Energy Fuels, 2018,2, 2698-2704
  •   Request permissions

    Large electrocaloric response and energy storage study in environmentally friendly (1 − x)K0.5Na0.5NbO3xLaNbO3 nanocrystalline ceramics

    R. Kumar, A. Kumar and S. Singh, Sustainable Energy Fuels, 2018, 2, 2698
    DOI: 10.1039/C8SE00276B

Search articles by author

Spotlight

Advertisements