TY - JOUR
T1 - Tuning the electrocaloric reversibility in ferroelectric copolymers by a blend approach
AU - Aziguli, Haibibu
AU - Liu, Yang
AU - Zhang, Guangzu
AU - Jiang, Shenglin
AU - Yu, Ping
AU - Wang, Qing
N1 - Publisher Copyright:
© 2019 EPLA.
PY - 2019/3
Y1 - 2019/3
N2 - In electrocaloric active polymers, the ferroelectric copolymer P(VDF-TrFE) 65/35 mol% exhibits the largest caloric performance (ΔS = 190.0 J K-1 kg-1,ΔT = 45.4K at an electric field of 100 MV m-1 and 85 °C) due to a sharp first-order phase transition. However, this high property occurs only at the first cycle and then drops significantly in the following electrical cycle, which significantly limits the promising applications of these copolymers. Here we use a blend approach to solve the irreversibility issue. We show that the incorporation of a terpolymer into a copolymer results in the evolution from normal ferroelectric to relaxor, which is accompanied by a large reduction in the thermal hysteresis. As a result, we find that complete reversibility of electrocaloric cycles in blends can be achieved for the copolymer/terpolymer volume ratio as 3/7.
AB - In electrocaloric active polymers, the ferroelectric copolymer P(VDF-TrFE) 65/35 mol% exhibits the largest caloric performance (ΔS = 190.0 J K-1 kg-1,ΔT = 45.4K at an electric field of 100 MV m-1 and 85 °C) due to a sharp first-order phase transition. However, this high property occurs only at the first cycle and then drops significantly in the following electrical cycle, which significantly limits the promising applications of these copolymers. Here we use a blend approach to solve the irreversibility issue. We show that the incorporation of a terpolymer into a copolymer results in the evolution from normal ferroelectric to relaxor, which is accompanied by a large reduction in the thermal hysteresis. As a result, we find that complete reversibility of electrocaloric cycles in blends can be achieved for the copolymer/terpolymer volume ratio as 3/7.
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U2 - 10.1209/0295-5075/125/57001
DO - 10.1209/0295-5075/125/57001
M3 - Article
AN - SCOPUS:85066328905
SN - 0295-5075
VL - 125
JO - Europhysics Letters
JF - Europhysics Letters
IS - 5
M1 - 57001
ER -