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

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 electrode solid electrolyte continues to be central obstacle in contemporary ASSBs. This work demonstrated first approach printing all‐solid‐state batteries by employing aerosol jet technology. A composite cathode, composed of active materials, binder polymer, conductive filler, was printed onto current collector. Subsequently, solventless superionic conducting polymer on cathode form seamless interface electrolyte, resulting 3D‐printed lithium‐ion battery. The material (lithium iron phosphate, LFP) achieved loading approximately 10 mg/cm 2 , while layer maintained thickness mere 24 microns. Under ambient conditions (30°C), half‐cell ASSB exhibited specific capacity over 130 mAh/g at 0.05 C. Advanced cells with porous membrane, which allows safely cycled higher temperature (60°C), fast charging/discharging rates. These were capable cycling 0.3 C rate, delivering surpassing 160 mAh/g. article is protected copyright. All rights reserved.