All‐Solid‐State Battery Fabricated by 3D Aerosol Jet Printing

Abstract

All‐solid‐state battery (ASSB) technology has emerged as a promising solution for developing safe and high‐energy‐density power sources. However, the pronounced interfacial charge transfer resistance between the electrode and the solid electrolyte continues to be a central obstacle in contemporary ASSBs. This work demonstrated the first approach to printing all‐solid‐state batteries by employing aerosol jet printing technology. A composite cathode, composed of active materials, binder polymer, and conductive filler, was printed onto the current collector. Subsequently, a solventless superionic conducting solid polymer electrolyte was printed on the cathode to form a seamless interface between the electrode and the electrolyte, resulting in a 3D‐printed all‐solid‐state lithium‐ion battery. The active material in the cathode (lithium iron phosphate, LFP) achieved a loading of approximately 10 mg/cm2, while the solid polymer electrolyte layer maintained a thickness of a mere 24 microns. Under ambient conditions (30°C), the half‐cell ASSB exhibited a specific capacity of over 130 mAh/g at 0.05 C. Advanced aerosol printed cells with a porous membrane, which allows the batteries to be safely cycled at higher temperature (60°C), exhibited fast charging/discharging rates. These batteries were capable of cycling at a 0.3 C rate, delivering a specific capacity surpassing 160 mAh/g.This article is protected by copyright. All rights reserved.