Investigation of Sputter‐Deposited Thin Films of Lithium Phosphorous Sulfuric Oxynitride (LiPSON) as Solid Electrolyte for Electrochromic Devices
Investigation of Sputter‐Deposited Thin Films of Lithium Phosphorous Sulfuric Oxynitride (LiPSON) as Solid Electrolyte for Electrochromic Devices
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DOI：
10.1002/pssb.202100032
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发表时间：
2021-07
期刊：
影响因子：
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通讯作者：
C. Lupó;F. Michel;Florian Kuhl;Yurong Su;M. Becker;A. Polity;D. Schlettwein
中科院分区：
文献类型：
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作者：
C. Lupó;F. Michel;Florian Kuhl;Yurong Su;M. Becker;A. Polity;D. Schlettwein
研究了通过射频溅射制备的锂磷硫氧氮化物（LiPSON）作为用于全固态电致变色（EC）器件的透明固体锂离子导体。LiPSON层通过X射线光电子能谱（XPS）进行表征，并通过温度依赖阻抗谱研究其电特性。沉积在氧化钨（WOx）上的LiPSON半电池与碳酸丙烯酯中的1 m LiClO 4接触，通过电化学阻抗谱（EIS）和循环伏安法和计时电流法的光谱电化学测量进行研究。LiPSON沉积条件对WOx的EC特性的显著影响在可实现的透明度变化以及漂白和着色状态下的颜色印象中观察到。固体电解质界面（SEI）的形成表明，导致EC性能差，开关时间长，为20 - 60分钟。建立适当的沉积条件，为LiPSON保持良好的EC活性的WOx。全固态EC器件由WOx/LiPSON组装而成，其中钒钛氧化物作为对电极，铝掺杂的氧化锌作为背接触。温度相关的EIS和光谱电化学测量表明，在这种全固态电池堆中，可以避免有害的接触电阻，并且实现了小于60 s的切换时间。
Lithium phosphorus sulfuric oxide nitride (LiPSON) prepared by radio frequency sputtering is investigated as a transparent solid lithium‐ion conductor for use in all‐solid‐state electrochromic (EC) devices. The LiPSON layers are characterized by X‐ray photoelectron spectroscopy (XPS) and their electrical characteristics are studied by temperature‐dependent impedance spectroscopy. Half‐cells of LiPSON deposited on tungsten oxide (WOx) in contact with 1 m LiClO4 in propylene carbonate are studied by electrochemical impedance spectroscopy (EIS) and spectroelectrochemical measurements by cyclic voltammetry and chronoamperometry. A significant influence of LiPSON deposition conditions on the EC characteristics of WOx is observed in the achievable transparency change, as well as the color impression in the bleached and colored state. Formation of a solid−electrolyte interface (SEI) is indicated that leads to poor EC performance with long switching times of 20−60 min. Appropriate deposition conditions for LiPSON are established that maintain a good EC activity of WOx. An all‐solid‐state EC device is assembled of WOx/LiPSON with vanadium titanium oxide as counter electrode and aluminum‐doped zinc oxide as back contact. Temperature‐dependent EIS and spectroelectrochemical measurements show that in such an all‐solid‐state stack, the detrimental contact resistance could be avoided and switching times of less than 60 s are achieved.