期刊
ADVANCED SCIENCE
卷 8, 期 19, 页码 -出版社
WILEY
DOI: 10.1002/advs.202100774
关键词
deposition; electrochemical behavior; solid-state battery; solid-state electrolyte; thin film mu-battery
Solid-state thin-film mu-batteries are micro-sized energy storage devices with high safety and increased capacity, which face various scientific and technical challenges before practical application. Understanding ion transfer in solid-state electrolytes and the effects of chemistry on electrochemical behaviors is crucial for the development of these batteries.
Continuous advances in microelectronics and micro/nanoelectromechanical systems enable the use of microsized energy storage devices, namely solid-state thin-film mu-batteries. Different from the current button batteries, the mu-battery can directly be integrated on microchips forming a very compact system on chip since no liquid electrolyte is used in the mu-battery. The all-solid-state battery (ASSB) that uses solid-state electrolyte has become a research trend because of its high safety and increased capacity. The solid-state thin-film mu-battery belongs to the family of ASSB but in a small format. However, a lot of scientific and technical issues and challenges are to be resolved before its real application, including the ionic conductivity of the solid-state electrolyte, the electrical conductivity of the electrode, integration technologies, electrochemical-induced strain, etc. To achieve this goal, understanding the processing of thin films and fundamentals of ion transfer in the solid-state electrolytes and hence in the mu-batteries becomes utmost important. This review therefore focuses on solid-state ionics and provides inside of ion transportation in the solid state and effects of chemistry on electrochemical behaviors and proposes key technology for processing of the mu-battery.
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