Abstract
For practical electrocaloric (EC) cooling devices, besides a large electrocaloric effect (ECE), the EC coefficients, e.g., δT/δE and δS/δE, where δT is the adiabatic temperature change, δE is the applied field change, and δS is the isothermal entropy change, are equally or even more important. An EC material with a large ECE and large EC coefficients will lead to practical EC cooling devices with high reliability. Here, we investigate a graphene enabled percolative relaxor polymer nanocomposite in order to address the challenge of how to generate a practically usable electrocaloric effect (ECE) under low electric field. We show that, through a proper fabrication process, the nanocomposites can reach a δT=5.2 K and δS=24.8 J kg-1 K-1 under 40 MV m-1, generating a large electrocaloric coefficients of δT/δE=0.13×10-6 km V-1 and δS/δE=0.62×10-6 J m kg-1 K-1 V-1. The work here indicates the promise of the percolative nanocomposite approach with graphene nanofillers to achieve a highly efficient and large ECE in the EC polymers for practical EC cooling.
| Original language | English |
|---|---|
| Pages (from-to) | 461-467 |
| Number of pages | 7 |
| Journal | Nano Energy |
| Volume | 22 |
| DOIs | |
| Publication status | Published - 2016 Apr 1 |
| Externally published | Yes |
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Keywords
- Electrocaloric effect
- Graphene
- Percolative nanocomposites
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering
Cite this
Graphene enabled percolative nanocomposites with large electrocaloric efficient under low electric fields over a broad temperature range. / Yang, Lu; Qian, Xiaoshi; Koo, Chong Min; Hou, Ying; Zhang, Tian; Zhou, Yue; Lin, Minren; Qiu, Jin Hao; Zhang, Q. M.
In: Nano Energy, Vol. 22, 01.04.2016, p. 461-467.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Graphene enabled percolative nanocomposites with large electrocaloric efficient under low electric fields over a broad temperature range
AU - Yang, Lu
AU - Qian, Xiaoshi
AU - Koo, Chong Min
AU - Hou, Ying
AU - Zhang, Tian
AU - Zhou, Yue
AU - Lin, Minren
AU - Qiu, Jin Hao
AU - Zhang, Q. M.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - For practical electrocaloric (EC) cooling devices, besides a large electrocaloric effect (ECE), the EC coefficients, e.g., δT/δE and δS/δE, where δT is the adiabatic temperature change, δE is the applied field change, and δS is the isothermal entropy change, are equally or even more important. An EC material with a large ECE and large EC coefficients will lead to practical EC cooling devices with high reliability. Here, we investigate a graphene enabled percolative relaxor polymer nanocomposite in order to address the challenge of how to generate a practically usable electrocaloric effect (ECE) under low electric field. We show that, through a proper fabrication process, the nanocomposites can reach a δT=5.2 K and δS=24.8 J kg-1 K-1 under 40 MV m-1, generating a large electrocaloric coefficients of δT/δE=0.13×10-6 km V-1 and δS/δE=0.62×10-6 J m kg-1 K-1 V-1. The work here indicates the promise of the percolative nanocomposite approach with graphene nanofillers to achieve a highly efficient and large ECE in the EC polymers for practical EC cooling.
AB - For practical electrocaloric (EC) cooling devices, besides a large electrocaloric effect (ECE), the EC coefficients, e.g., δT/δE and δS/δE, where δT is the adiabatic temperature change, δE is the applied field change, and δS is the isothermal entropy change, are equally or even more important. An EC material with a large ECE and large EC coefficients will lead to practical EC cooling devices with high reliability. Here, we investigate a graphene enabled percolative relaxor polymer nanocomposite in order to address the challenge of how to generate a practically usable electrocaloric effect (ECE) under low electric field. We show that, through a proper fabrication process, the nanocomposites can reach a δT=5.2 K and δS=24.8 J kg-1 K-1 under 40 MV m-1, generating a large electrocaloric coefficients of δT/δE=0.13×10-6 km V-1 and δS/δE=0.62×10-6 J m kg-1 K-1 V-1. The work here indicates the promise of the percolative nanocomposite approach with graphene nanofillers to achieve a highly efficient and large ECE in the EC polymers for practical EC cooling.
KW - Electrocaloric effect
KW - Graphene
KW - Percolative nanocomposites
UR - http://www.scopus.com/inward/record.url?scp=84959531162&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959531162&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2016.02.026
DO - 10.1016/j.nanoen.2016.02.026
M3 - Article
VL - 22
SP - 461
EP - 467
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
ER -