An analysis of lead-free (Bi0.5Na0.5)0.915-(Bi0.5K0.5)0.05Ba0.02Sr0.015TiO3 ceramic for efficient refrigeration and thermal energy harvesting

Abstract

This article demonstrates the colossal energy harvesting capability of a lead-free (Bi0.5Na0.5)0.915-(Bi0.5K0.5)0.05Ba0.02Sr0.015TiO3 ceramic using the Olsen cycle. The maximum harvestable energy density estimated for this system is found to be 1523 J/L (1523 kJ/m3) where the results are presented for extreme ambient conditions of 20–160 °C and electric fields of 0.1–4 MV/m. This estimated energy density is 1.7 times higher than the maximum reported to date for the lanthanum-doped lead zirconate titanate (thin film) system. Moreover, this study introduces a generalized and effective solid state refrigeration cycle in contrast to the ferroelectric Ericson refrigeration cycle. The cycle is based on a temperature induced polarization change on application of an unipolar electric field to ferroelectric ceramics.

Giant pyroelectric energy harvesting and a negative electrocaloric effect in multilayered nanostructures

“…[25][26][27][29][30][31][32][33] . Moreover, recent studies in this direction also strongly support their claim 28,[34][35][36][37][38][39][40][41][42][43] and suggests that the Olsen cycle has particular advantages for pyroelectric based harvesting. Therefore, both the Olsen cycle and ECE are being extensively explored for 'giant' energy conversion applications.…”

Giant Thermal–Electrical Energy Harvesting Effect of Pb0.97La0.02(Zr0.75Sn0.18Ti0.07)O3 Antiferroelectric Thick Film

“…It was founded that the improved energy harvesting performance could be realized in the materials with large pyroelectric coefficient via the Olsen cycle. For example, a large W value of 0.888 and 1.523 J/cm 3 were obtained in Pb 0.92 La 0.08 (Zr 0.65 Ti 0.35 )O 3 and (Bi 0.5 Na 0.5 ) 0.915 –(Bi 0.5 K 0.5 ) 0.05 Ba 0.02 Sr 0.015 TiO 3 ceramics, respectively …”

“…Intrigued by Olsen's work, quite a few papers on the thermal–electrical energy harvesting were reported in different pyroelectric materials, such as bulks ferroelectric (FE) ceramics and polymers . It was founded that the improved energy harvesting performance could be realized in the materials with large pyroelectric coefficient via the Olsen cycle.…”

Cyclic Electrical Energy Harvesting Using Mechanical Confinement in Ferroelectric Ceramics

“…We have been continuously working in the direction of energy harvesting using ferroelectric materials . In this work, we have used well‐documented material compositions namely 0.5PbZrO 3 ‐0.5Pb(Ni 1/3 Nb 2/3 )O 3 (PZ‐PNN) and 0.9Pb(Zr 1/2 Ti 1/2 )O 3 ‐0.1Pb(Zn 1/3 Nb 2/3 )O 3 (0.9PZT‐0.1PZN) for indirect measurements of harnessable energy densities using the proposed energy harvesting cycle.…”

“…Ferroelectric materials have attracted the attention of researchers as an appealing class of materials for ambient energy harvesting and scavenging waste energy . In this direction, a huge number of studies report their usage for electrical energy conversion from mechanical vibrations and temperature fluctuations . It is important to note that most of these studies employ conventional designs that are based on linear approaches.…”