Abstract: The present disclosure provides a pure-H2O-fed membrane-electrode assembly (MEA) electrolysis system for electrocatalytic CO2 reduction (ECO2R) to ethylene (C2H4) and C2+ compounds under an industrial applicable continuous flow condition with at least 1000-hour lifetime, and fabrication method thereof.

Abstract: The present disclosure provides a pure-H2O-fed membrane-electrode assembly (MEA) electrolysis system for electrocatalytic CO2 reduction (ECO2R) to ethylene (C2H4) and C2+ compounds under an industrial applicable continuous flow condition with at least 1000-hour lifetime, and fabrication method thereof.

Abstract: An energy storage system is provided for an electric vehicle. The energy storage system comprises a first energy storage source. The first energy storage source includes an ammonia tank configured to hold ammonia, an ammonia converter configured to receive ammonia from the ammonia tank and convert the received ammonia into hydrogen, and a fuel cell system communicating with the ammonia converter and configured to generate output power from hydrogen that is received from the ammonia converter.

Abstract: In the present invention there is provided an MnO2 electrode with improved electrochemical properties, and a method of preparation of an electrode, wherein there anode comprises a substrate at least partially coated with MnO2 nanosheets (MnNSs) forming additive free MnO2 thin films. The method includes providing MnO2 nanosheets (MnNSs) suspension with diameters less than 50 nm; printing the MnNSs suspension on substrates to form MnO2 thin films (MnTFs); and annealing the MnTFs at 260-320° C. for at least 100 minutes. Energy storage device comprising the MnO2 electrode such as a Na-ion cell, and a Li-ion cell are also described.

Abstract: In one aspect, the present disclosure relates to an improved method of preparing concentrated MnO2 ink with increased efficiency and cost effectiveness. The method involves mixing KMnO4 solution with highly crystalline carbon particles (HCCPs) with average diameters less than 800 nm at 30-60° C. for at least 8 hours. The present disclosure further relates to a symmetric supercapacitor device comprising MnO2 coated electrodes and a solid state ionic liquid as electrolyte, as well as an interdigital transparent SC (IT-SC) device comprising aqueous MnO2 ink.

Abstract: In the present invention there is provided an MnO2 anode with improved electrochemical properties, and a method of preparation of an anode, wherein there anode comprises a substrate at least partially coated with MnO2 nanosheets (MnNSs) forming additive free MnO2 thin films. The method includes providing MnO2 nanosheets (MnNSs) suspension with diameters less than 50 nm; printing the MnNSs suspension on substrates to form MnO2 thin films (MnTFs); and annealing the MnTFs at 260-320° C. for at least 100 minutes. Energy storage device comprising the MnO2 anode such as a Na-ion cell, and a Li-ion cell are also described.

Abstract: In one aspect, the present disclosure relates to an improved method of preparing concentrated MnO2 ink with increased efficiency and cost effectiveness. The method involves mixing KMnO4 solution with highly crystalline carbon particles (HCCPs) with average diameters less than 800 nm at 30-60° C. for at least 8 hours. The present disclosure further relates to a symmetric supercapacitor device comprising MnO2 coated electrodes and a solid state ionic liquid as electrolyte, as well as an interdigital transparent SC (IT-SC) device comprising aqueous MnO2 ink.

Abstract: A radiation detector has an electron emitter that includes a coated nanostructure on a support. The nanostructure can include a plurality of nanoneedles. A nanoneedle is a shaft tapering from a base portion toward a tip portion. The tip portion has a diameter between about 1 nm to about 50 nm and the base portion has a diameter between about 20 nm to about 300 nm. Each shaft has a length between about 100 nm to about 3,000 nm and an aspect ratio larger than 10. A coating covers at least the tip portions of the shafts. The coating exhibits negative electron affinity and is capable of emitting secondary electrons upon being irradiated by radiation. The nanostructure can also include carbon nanotubes (CNTs) coated with a material selected from the group of aluminum nitride (AlN), gallium nitride (GaN), and zinc oxide (ZnO).