摘要:
A direct oxidation fuel cell (DOFC) system comprises at least one fuel cell assembly including a cathode and an anode with an electrolyte positioned therebetween; a source of liquid fuel in fluid communication with an anode inlet; an oxidant supply in fluid communication with a cathode inlet; a liquid/gas (L/G) separator in fluid communication with anode and cathode outlets for: (1) receiving unreacted fuel and liquid and gaseous products of electrochemical reactions at the cathode and anode, and (2) supplying the unreacted fuel and liquid product to the inlet of said anode; and a control and/or regulation system for determining a fuel efficiency value of the DOFC system during operation and determining and regulating and/or controlling oxidant stoichiometry of the DOFC system at an appropriate value in response to the determined fuel efficiency value.
摘要:
An exemplary hinge assembly (300) for use in a flat display monitor includes a support member (10), a rotational base (20) and a pivot mechanism (30) for rotatably connecting the rotational base to the support member. The rotational base includes a fixing board (22) and a side board (24) disposed at an end of the fixing board, the side board defining an engaging hole (242) and forming an inwardly bent portion (240) at a distal end edge thereof. The support member includes an extending seat (16) defining a round pivoting hole (1601), and a retaining portion (161) extending from an exterior side of the extending seat. The retaining portion of the side board is configured for blocking the inwardly bent portion of the side board so that a range of rotation of the rotational base relative to the support member is between a first utmost position and a second utmost position.
摘要:
A cathode electrode for use in a fuel cell comprises, in sequence, a catalyst layer, a hydrophobic microporous layer (MPL), and a gas diffusion layer (GDL), wherein the MPL comprises a mixture of first and second hydrophobic materials having different melt viscosities. Also disclosed is a method for fabricating the hydrophobic microporous layer as part of a cathode electrode. The cathode electrode is particularly useful in direct oxidation fuel cells and systems, such as direct methanol fuel cells and systems operating with highly concentrated liquid fuel.
摘要:
A direct oxidation fuel cell (DOFC) system comprises at least one fuel cell assembly including a cathode and an anode with an electrolyte positioned therebetween; a source of liquid fuel in fluid communication with an anode inlet; an oxidant supply in fluid communication with a cathode inlet; a liquid/gas (L/G) separator in fluid communication with anode and cathode outlets for: (1) receiving unreacted fuel and liquid and gaseous products of electrochemical reactions at the cathode and anode, and (2) supplying the unreacted fuel and liquid product to the inlet of said anode; and a control and/or regulation system for determining a fuel efficiency value of the DOFC system during operation and determining and regulating and/or controlling oxidant stoichiometry of the DOFC system at an appropriate value in response to the determined fuel efficiency value.
摘要:
A controller in a charging control system controls a charger to heat a battery at a low temperature by pulse charging and discharging up to a desired temperature and then moves to a normal charging mode. The controller calculates an ion concentration of an active material at electrode portions of the battery on the basis of the temperature data and the electric current data obtained, switch the pulse charging and discharging between a charging mode and a discharging mode on the basis of a pulse width when the ion concentration reaches a threshold.
摘要:
A direct oxidation fuel cell (DOFC) system, comprises at least one fuel cell assembly including a cathode and an anode with an electrolyte positioned therebetween, adapted for performing selected electrochemical reactions; a source of concentrated liquid fuel in fluid communication with an inlet of the anode; an oxidant supply in fluid communication with an inlet of the cathode; a liquid/gas (L/G) separator in fluid communication with outputs of the anode and cathode for receiving unreacted fuel and liquid and gaseous products of the electrochemical reactions; and a converter for catalytically converting a portion of the unreacted fuel to the liquid and gaseous products.
摘要:
A proton (H+)-conducting hydrocarbon (HC)-based polymer electrolyte membrane (PEM) having first and second oppositely facing surfaces comprises a HC-based membrane with at least one perfluoropolymer incorporated on or within at least the first and second surfaces. A method for fabricating the PEM comprises surface treating a HC-based polymeric membrane sheet via immersion in an aqueous solution or dispersion of said at least one perfluoropolymer, followed by drying of the surface treated polymeric membrane sheet.
摘要:
A direct methanol fuel cell unit is provided with a fuel cell including an anode, a cathode with a hydrophobic microporous layer, an electrolyte membrane put in-between, and a fuel supply path supplying fuel to the anode. The fuel supply path is provided with an upwind water barrier preventing back-diffusion of water and a gas flow path channeling gas generated at the anode and disposed between the barrier and the anode. A water-rich zone is formed between the water barrier and the cathode microporous layer. Water loss from either side of this zone is eliminated or minimized, thereby permitting direct use of highly concentrated methanol in the fuel flow path with good fuel efficiency and power performance. The cell unit can be applied equally well to both an active circulating air cathode and an air-breathing cathode.
摘要:
A direct oxidation fuel cell (DOFC) having a liquid fuel and an anode electrode configured to generate power. The anode electrode includes a gas diffusion layer (GDL) and a microporous layer, such that a decrease in the porosity of the GDL achieves an increase in the power density of the DOFC.
摘要:
A direct oxidation fuel cell (DOFC) having a liquid fuel and an anode electrode configured to generate power. The anode electrode includes a gas diffusion layer (GDL) and a microporous layer, such that a decrease in the porosity of the GDL achieves an increase in the power density of the DOFC.