OPTIMIZATION OF THE INTERFACIAL RESISTANCE OF SUPERCAPACITORS BY FORMING LASER-INDUCED PERIODIC STRUCTURES ON CURRENT COLLECTORS

The object of the study is supercapacitors, particularly their collectors and methodsfor reducing interfacial resistance at the boundary between the collector and the active material by forming laser-induced periodic surface structures (LIPSS). Interfacial resistance between the collector and the active material leads to energy losses and a decrease in the specific power of the device.The study established that LIPSS can significantly improve the electrochemical characteristics of supercapacitors. The primary effects of improved electrochemical characteristics are explained by several factors. The periodic structures formed by the laser contribute to an increase in the contact area between the electrode material and the collector, thereby reducing specific resistance. Laser processing induces certain chemical changes on the surface of the current collector, which may enhance electrical conductivity and chemical stability of the contact. For the successful implementation of this method, it is necessary to optimize the integration of laser processing into the production cycle. Economic feasibility and technology scaling remain crucial considerations; however, the significant reduction in internal resistances opens up prospects for increasing the specific power of various types of supercapacitors. The laser processing method does not require the use of additional reagents or multi-component sublayers, which simplifies production and makes this approach attractive for commercial application.