![]() ![]() Currently, there are few studies on the preparation and characterization of micron-scale electrolytes.Therefore, according to the above-mentioned idea of ultrathin electrolytes for lithium-ion batteries 11, this paper will try to prepare ultrathin electrolytes for Al–air batteries by aerosol jet printing. Conventional preparation methods are difficult to fabricate micron-scale electrolytes, and the controllability of the thickness is unsatisfactory. According to relevant literatures, the thickness of the solid electrolyte in the existing research for Al–air batteries is generally several millimeters or even several centimeters 14, 15. In fact, the conductance of the electrolyte is directly related to the thickness, and reducing the thickness could increase the conductance. It can be seen that reducing the thickness of the electrolyte can not only improve the portability of the battery, but also help to improve the conductance of the electrolyte, thereby improving the electrochemical performance of the battery.Įxisting researches on electrolytes of Al–air batteries mainly focus on how to improve the conductivity of the solid electrolyte, and pay less attention to the thickness 13. Previous studies have also shown that the ion diffusion time in the electrolyte is proportional to the square of the electrolyte thickness 9, and the conductance of the electrolyte is inversely proportional to the electrolyte thickness 12. The thickness of the electrolyte is about 100 microns, and thanks to its thickness advantage, higher ionic conductance is obtained compared to traditional solid-state gel electrolytes. 11 have successfully prepared ultrathin gel electrolytes for lithium-ion batteries based on aerosol jet printing. In related research on other types of batteries, we noticed that in order to improve the electrochemical performance and portability of lithium-ion batteries, scientists tried to prepare ultrathin solid-state gel electrolytes. In fact, the thicknesses of the anode and the cathode are difficult to further decrease, while the solid electrolyte has more space for optimization.Īt present, the solid electrolytes of Al–air batteries are mainly prepared by sol-gel 3, 5, polymerization, casting 6, 7 and inkjet printing 8, and the thickness is generally between several millimeters to several centimeters 9, 10. Therefore, the preparation of ultrathin Al–air batteries is particularly important. 3, 4 However, the thickness of the current Al–air battery is difficult to match the requirements of wearable electronic devices, which would affects the portability and comfort of the product. Al–air batteries have received extensive attention from scientific researchers due to their light weight, high energy density, and environmental friendliness 1, 2, and have been initially applied in the fields of biosensors, folding screens, flexible circuit boards and etc. ![]()
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