Although a high electric energy density was recently reported for defect-modified poly(vinylidene fluoride) (PVDF) copolymers at millisecond discharge, they usually deliver less energy at a high pulse rate. In this letter, a low loss polystyrene (PS) was grafted as side chains onto the P(VDF-chlorotrifluoroethylene) main chain. After PVDF crystallization, dielectric PS side chains were segregated to the crystalline-amorphous interface, forming a finite confinement layer for ferroelectric PVDF crystals. We speculated that less space charge was induced during electric poling because of the nanoscale confinement effect. Consequently, a fast discharge speed and a relatively high energy density were achieved.

1.
J.
Ho
,
R.
Ramprasad
, and
S.
Boggs
,
IEEE Trans. Dielectr. Electr. Insul.
14
,
1295
(
2007
).
3.
K.
Tashiro
, in
Ferroelectric Polymers: Chemistry, Physics, and Applications
, edited by
H. S.
Nalwa
(
Marcel Dekker
,
New York
,
1995
), pp.
63
182
.
4.
B.
Chu
,
X.
Zhou
,
K.
Ren
,
B.
Neese
,
M.
Lin
,
Q.
Wang
,
F.
Bauer
, and
Q. M.
Zhang
,
Science
313
,
334
(
2006
).
5.
X.
Zhou
,
B.
Chu
,
B.
Neese
,
M.
Lin
, and
Q. M.
Zhang
,
IEEE Trans. Dielectr. Electr. Insul.
14
,
1133
(
2007
).
6.
H.
von Seggern
and
S. N.
Fedosov
,
Appl. Phys. Lett.
81
,
2830
(
2002
).
7.
V. A.
Stephanovich
,
I. A.
Luk’yanchuk
, and
M. G.
Karkut
,
Phys. Rev. Lett.
94
,
047601
(
2005
).
8.
F.
MacDougall
,
J.
Ennis
,
X. H.
Yang
,
K.
Seal
,
S.
Phatak
,
B.
Spinks
,
N.
Keller
,
C.
Naruo
, and
T. R.
Jow
,
IEEE International Pulsed Power Conference
, Monterey, CA,
2005
(unpublished).
9.
M.
Zhang
and
T. P.
Russell
,
Macromolecules
39
,
3531
(
2006
).
10.
See EPAPS Document No. E-APPLAB-94-029906 for graft copolymer synthesis, H1 and F19 NMR spectra, size exclusion chromatography characterization, discharge circuit, discharge profiles, theoretical discharge time τ0.9, differential scanning calorimetry, and crystal orientation in capacitor films. For more information on EPAPS, see http://www.aip.org/pubservs/epaps.html.
11.
D.
Rollik
,
S.
Bauer
, and
R.
Gerhard-Multhaupt
,
J. Appl. Phys.
85
,
3282
(
1999
).

Supplementary Material

You do not currently have access to this content.