An atmospheric water electrolyzer for decentralized green hydrogen production

Conduction Mechanism in Graphene Oxide Membranes with Varied Water Content: From Proton Hopping Dominant to Ion Diffusion Dominant

“…A slight decrease (∼0.5 Å) of the d -spacing indicates that the impedance measurement has no apparent effect on the layer space of GOM. The tiny change in the interlayer distance and oxidation rate is the low testing voltage (the open-circuit voltage <0.2 V) and the protection of water molecules in GOM …”

“…The tiny change in the interlayer distance and oxidation rate is the low testing voltage (the open-circuit voltage <0.2 V) and the protection of water molecules in GOM. 80 Interestingly, the change of conduction mechanisms for GOMs differs from those of Nafion-based membranes, which are regarded as high proton conductors in the field of proton exchange membrane fuel cells. 48,81 The proton transport of Nafion shows that it is dominated by the vehicle mechanism at low water content and the Grotthus mechanism at high water content.…”

Uniquely Designed Tungsten Oxide Nanopetal Decorated Electropsun PAN Nanofiber for a Flexible Supercapacitor with Ultrahigh Rate Capability and Cyclability

“…Over the past decades, tremendous progress has been made to generate advanced energy storage systems such as metal-ion batteries, 2,3 electrochemical supercapacitors, 4 and redox flow batteries, along with highly efficient energy conversion devices such as fuel cells, photovoltaics, and electrolysis. 5,6 Among the numerous available energy technologies, electrochemical energy technology, especially batteries and supercapacitors (SCs), is the most promising alternative and a key representative for electrochemical energy storage (EES) systems, owing to the high efficiency, safety, and economic viability. Unlike batteries, where charge stored is significantly due to the redox reaction occurring in the bulk, SCs follow a surface-mediated mechanism to store the energy, 4−7 making them more superior in terms of its ability to deliver a high power density and excellent durability (up to 10 5 −10 6 cycles).…”

“…An immense rise in environmental pollution and the finite availability of fossil fuels are constantly propelling the research community to lean toward clean and renewable energy sources. − However, because of their intermittent nature, time limitations, and climate-dependence constraints, there is an acute need for efficient and reliable energy conversion and storage technologies in order to fulfill long-term energy consumptions. Over the past decades, tremendous progress has been made to generate advanced energy storage systems such as metal-ion batteries, , electrochemical supercapacitors, and redox flow batteries, along with highly efficient energy conversion devices such as fuel cells, photovoltaics, and electrolysis. , …”

“…Among the numerous available energy technologies, electrochemical energy technology, especially batteries and supercapacitors (SCs), is the most promising alternative and a key representative for electrochemical energy storage (EES) systems, owing to the high efficiency, safety, and economic viability. Unlike batteries, where charge stored is significantly due to the redox reaction occurring in the bulk, SCs follow a surface-mediated mechanism to store the energy, − making them more superior in terms of its ability to deliver a high power density and excellent durability (up to 10 5 –10 6 cycles). They are also capable of offering us a higher capacitance than the conventional dielectric capacitors, making them significant to satisfy the energy requirements especially in the case where a burst of power is required for a shorter span of time .…”