Efficient Power Generation based-on Carbon yarn in Coaxial Hydrogen Peroxide Fuel Cells

Hydrogen peroxide (H2O2) fuel cells have garnered considerable attention as a promising alternative power source for micro/nano-electronic devices due to their noteworthy attributes, encompassing elevated energy density and reduced environmental footprint. Nevertheless, these fuel cells confront intricate technological intricacies and pragmatic application impediments, prominently encompassing challenges concerning limited stability and modest catalytic efficacy. We demonstrate an innovative methodology employing carbon yarns—comprising carbon nanotubes (CNTs) or carbon fibers (CNFs)—as electrodes, synergistically amalgamated with C60-anchored FeII3 [{CoIII(CN)6}2] and non-precious metal wire in a coaxial H2O2 fuel cell configuration. This augmentation culminates in a notable amplification in fuel cell performance, substantiated by the achievement of an exceptional maximum power density of 15.01 mW cm-2. Furthermore, the open circuit voltage sustain operation for an extended duration of 26 hours with minimal decay. We also investigate the impact of varying lengths of fiber fuel cell on performance. Collectively, the work underscores the potential of carbon yarns as promising fiber fuel cell electrodes, poised to enable high-performance and enduring long coaxial H2O2 fuel cells. These advancements hold implications for portable and implantable electronic devices, facilitating sustainable and effective energy solutions.