Compact autonomous ultrahigh power density energy storage and power generation devices that exploitthe spontaneous polarization of ferroelectric materials are capable of producing hundreds of kilovoltvoltages,multi-ki...Compact autonomous ultrahigh power density energy storage and power generation devices that exploitthe spontaneous polarization of ferroelectric materials are capable of producing hundreds of kilovoltvoltages,multi-kiloampere currents,and megawatt power levels for brief interval of time.The storagelife of these devices is four orders of magnitude longer than that for electrochemical batteries andelectrochemical capacitors.Herein is an up to date survey of ferroelectric materials used for these highpower devices.Several types of ferroelectric ceramics possess the ability to be depolarized under adia-batic compression and can be successfully used for high power applications.In addition to bulk ferro-electric ceramics,multilayer ferroelectric films are very efficient materials for high power systems.Ofparticular importance is the ability of relaxor ferroelectric single crystals to produce significantly higherelectric charge density and energy density than ceramics,making them promising materials for highpower applications.Also provided is a brief survey of recent developments of ferroelectric materials forhigh energy density and power density dielectric capacitors.Numerous ceramics have been developed,including antiferroelectric and relaxor antiferroelectric solid solutions,providing high energy densityand efficiency simultaneously.展开更多
文摘Compact autonomous ultrahigh power density energy storage and power generation devices that exploitthe spontaneous polarization of ferroelectric materials are capable of producing hundreds of kilovoltvoltages,multi-kiloampere currents,and megawatt power levels for brief interval of time.The storagelife of these devices is four orders of magnitude longer than that for electrochemical batteries andelectrochemical capacitors.Herein is an up to date survey of ferroelectric materials used for these highpower devices.Several types of ferroelectric ceramics possess the ability to be depolarized under adia-batic compression and can be successfully used for high power applications.In addition to bulk ferro-electric ceramics,multilayer ferroelectric films are very efficient materials for high power systems.Ofparticular importance is the ability of relaxor ferroelectric single crystals to produce significantly higherelectric charge density and energy density than ceramics,making them promising materials for highpower applications.Also provided is a brief survey of recent developments of ferroelectric materials forhigh energy density and power density dielectric capacitors.Numerous ceramics have been developed,including antiferroelectric and relaxor antiferroelectric solid solutions,providing high energy densityand efficiency simultaneously.
