High field tunneling as a limiting factor of maximum energy density in dielectric energy storage capacitors
High field tunneling as a limiting factor of maximum energy density in dielectric energy storage capacitors
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DOI：
10.1063/1.2903115
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发表时间：
2008-04-07
影响因子：
4
通讯作者：
Zhang, Shihai
中科院分区：
文献类型：
--
作者：
Chen, Qin;Wang, Yong;Zhang, Shihai
在几种低损耗介电材料中，观察到能量损耗在低和中电场下保持非常小，但在高电场下急剧增加，这被认为是由于隧穿电流。隧穿电流的增加是由于势垒宽度和高度的减小，这是所有介质材料中普遍存在的现象。由于高能量效率的要求，高场传导对最大操作场设置了限制，其可能低于击穿场并且充当能量密度的限制因素。(C)2008年美国物理研究所。
In several low loss dielectric materials, it was observed that the energy loss remains very small under low and medium electric fields but dramatically increases at high field which is believed to be due to tunneling current. The increase of tunneling current at high field is due to the decrease of barrier width and height and is a universal phenomenon in all dielectric materials. Due to the requirement of high energy efficiency, high field conduction places a limit for the maximum operation field, which could be lower than the breakdown field and act as the limiting factor of energy density. (C) 2008 American Institute of Physics.