Nonlinear Dielectric Thin Films for High-Power Electric Storage With Energy Density Comparable With Electrochemical Supercapacitors
Nonlinear Dielectric Thin Films for High-Power Electric Storage With Energy Density Comparable With Electrochemical Supercapacitors
复制标题
DOI：
10.1109/tuffc.2011.2039
复制
发表时间：
2011-09-01
影响因子：
3.6
通讯作者：
Lu, Li
中科院分区：
文献类型：
--
作者：
Yao, Kui;Chen, Shuting;Lu, Li
虽然电池具有高能量存储密度，但它们的输出功率受到电荷载流子的缓慢移动的限制，因此通常需要电容器来提供高功率输出。介电电容器具有高功率密度和快速放电速率，但其能量密度通常远低于电化学超级电容器。提高电介质材料的能量密度是非常期望的，以扩展它们在许多新兴电力系统应用中的应用。本文综述了电化学超级电容器和电介质电容器的储能机理和主要特点。介绍了三种自制的高能量密度铁电非线性介质薄膜材料，包括（Pb0.97La0.02）（Zr0.90Sn0.05Ti0.05）O-3（PLZST）反铁电陶瓷薄膜、Pb（Zn 1/3 Nb 2/3）O-3-Pb（Mg 1/3 Nb 2/3）O-3-PbTiO 3（PZN-PMN-PT）弛豫铁电陶瓷薄膜和聚偏氟乙烯（PVDF）基聚合物共混物薄膜。结果表明，这些薄膜材料具有非常高的功率密度和相当高的能量密度，与电化学超级电容器相当，是有前途的电存储。
Although batteries possess high energy storage density, their output power is limited by the slow movement of charge carriers, and thus capacitors are often required to deliver high power output. Dielectric capacitors have high power density with fast discharge rate, but their energy density is typically much lower than electrochemical supercapacitors. Increasing the energy density of dielectric materials is highly desired to extend their applications in many emerging power system applications. In this paper, we review the mechanisms and major characteristics of electric energy storage with electrochemical supercapacitors and dielectric capacitors. Three types of in-house-produced ferroic nonlinear dielectric thin film materials with high energy density are described, including (Pb0.97La0.02)(Zr0.90Sn0.05Ti0.05)O-3 (PLZST) antiferroelectric ceramic thin films, Pb(Zn1/3Nb2/3)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PZN-PMN-PT) relaxor ferroelectric ceramic thin films, and poly(vinylidene fluoride) (PVDF)-based polymer blend thin films. The results showed that these thin film materials are promising for electric storage with outstandingly high power density and fairly high energy density, comparable with electrochemical supercapacitors.