摘要:
In various aspects, provided are substantially single phase ceramic membranes, gas separation devices based thereon, and methods of making the membranes. In various embodiments, the membranes and devices can be used for hydrogen production, such as in a fuel-cell.
摘要:
In various aspects, provided are methods for: (a) improving oxygen incorporation in a solid oxide layer less than about 1000 nm thick; (b) extending the on-set of mixed conduction in a solid oxide layer less than about 1000 nm thick; (c) modulating the electrical conductivity of oxide ion conducting layer less than about 1000 nm thick; (d) decreasing the conductivity of an oxide ion conducting layer less than about 1000 nm thick; (e) improving the performance of a solid oxide fuel cell; and (f) improving the performance of a gas separation device. In various embodiments, the methods comprise exposing oxygen to light having one or more wavelengths in the range between about 100 nm to about 365 nm and contacting the layer with the oxygen so exposed. In various embodiments, the methods provide the potential for tailoring the surface catalytic activity of oxygen-ion and mixed conductors used in various solid-state devices.
摘要:
A pseudocapacitor employs plates having an active material of a nanoparticles sized ceramic mixed ionic-electronic conductor such as may have the nominal formula of ABO3, A2BO4, AB2O4, and AO2, where A and B are metals. The active material may be prepared to promote sublattice vacancies to provide for the storage of additional charge.
摘要:
A mixed ionic and electronic conducting membrane includes a two-phase solid state ceramic composite, wherein the first phase comprises an oxygen ion conductor and the second phase comprises an n-type electronically conductive oxide, wherein the electronically conductive oxide is stable at an oxygen partial pressure as low as 10−20 atm and has an electronic conductivity of at least 1 S/cm. A hydrogen separation system and related methods using the mixed ionic and electronic conducting membrane are described.
摘要:
An electrical energy storage device includes a first electrode; a second electrode; a separator; and an electrolyte; where the separator is an electronic insulator; the separator is positioned between the first and second electrodes; the separator includes a first surface proximal to the first electrode and a second surface proximal to the second electrode; the separator is configured to support an electric double layer at the first surface, the second surface, or at both the first surface and the second surface; and the device is an electrical energy storage device.
摘要:
A mixed ionic and electronic conducting membrane includes a two-phase solid state ceramic composite, wherein the first phase comprises an oxygen ion conductor and the second phase comprises an n-type electronically conductive oxide, wherein the electronically conductive oxide is stable at an oxygen partial pressure as low as 10−20 atm and has an electronic conductivity of at least 1 S/cm. A hydrogen separation system and related methods using the mixed ionic and electronic conducting membrane are described.
摘要:
An electrical energy storage device includes a first electrode; a second electrode; a separator; and an electrolyte; where the separator is an electronic insulator; the separator is positioned between the first and second electrodes; the separator includes a first surface proximal to the first electrode and a second surface proximal to the second electrode; the separator is configured to support an electric double layer at the first surface, the second surface, or at both the first surface and the second surface; and the device is an electrical energy storage device.
摘要:
The preset invention is a hierarchically-structured carbon microbead and method for forming the microbead utilizing hydrothermal carbonization of a biomass/catalyst mixture to produce partially carbonized amorphous microspheres, wherein the biomass is an inexpensive material containing a high oxygen content component (e.g., sugar, starch, alcohol), and the catalyst is a metal or metal-containing compound, preferably a transition metal compound, and more specifically a transition metal selected from Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt. Subsequently, a heat treatment is performed where the amorphous microspheres are heated to a temperature that is sufficiently high so as to result in carbonization, graphitization, and production of a carbonaceous coating or shell on the core of the microbead.
摘要:
The preset invention is a hierarchically-structured carbon microbead and method for forming the microbead utilizing hydrothermal carbonization of a biomass/catalyst mixture to produce partially carbonized amorphous microspheres, wherein the biomass is an inexpensive material containing a high oxygen content component (e.g., sugar, starch, alcohol), and the catalyst is a metal or metal-containing compound, preferably a transition metal compound, and more specifically a transition metal selected from Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt. Subsequently, a heat treatment is performed where the amorphous microspheres are heated to a temperature that is sufficiently high so as to result in carbonization, graphitization, and production of a carbonaceous coating or shell on the core of the microbead.
摘要:
A pseudocapacitor employs plates having an active material of a nanoparticles sized ceramic mixed ionic-electronic conductor such as may have the nominal formula of ABO3, A2BO4, AB2O4, and AO2, where A and B are metals. The active material may be prepared to promote sublattice vacancies to provide for the storage of additional charge.