Laser Direct Writing of Hydrous Ruthenium Dioxide Micro-Pseudocapacitors

Craig B. Arnold, Ryan C. Wartena, Bhanu Pratap, Karen E. Swider-Lyons, Alberto Piqué
2001 Materials Research Society Symposium Proceedings  
We are using a laser engineering approach to develop and optimize hydrous ruthenium dioxide (RuO x H y or RuO 2 ·0.5 H 2 O) pseudocapacitors. We employ a novel laser forward transfer process, Matrix Assisted Pulsed Laser Evaporation Direct Write (MAPLE-DW), in combination with UV laser machining, to fabricate mesoscale pseudocapacitors and microbatteries under ambient temperature and atmospheric conditions. Thin films with the desired high surface area morphology are obtained without
more » ... g their electrochemical performance. The highest capacitance structures are achieved by depositing mixtures of sulfuric acid with the RuO 2 ·0.5 H 2 O electrode material. Our pseudocapacitors exhibit linear discharge behavior and their properties scale proportionately when assembled in parallel and series configurations.
doi:10.1557/proc-698-q3.2.1 fatcat:ity2tswfpngyzisnvne7quvnq4