Abstract: The present disclosure provides a membrane electrode assembly (MEA) with high-efficiency water and heat management for a direct ethanol fuel cell (DEFC), and a fabrication method therefor, and belongs to the technical field of fuel cells. In the MEA for a DEFC in the present disclosure, a cathode catalyst layer is designed to be convex and ordered and an anode catalyst layer is designed to be concave and ordered, which is conducive to the timely discharge of the generated heat. The MEA for a DEFC can be fabricated by gradually fabricating each layer of the MEA on an inner surface and an outer surface of a proton-exchange membrane (PEM) or by step-by-step dip coating on an anode support tube. The present disclosure can effectively improve the working capacity of the cell.

Abstract: The present disclosure provides a membrane electrode assembly (MEA) with high-efficiency water and heat management for a direct ethanol fuel cell (DEFC), and a fabrication method therefor, and belongs to the technical field of fuel cells. In the MEA for a DEFC in the present disclosure, a cathode catalyst layer is designed to be convex and ordered and an anode catalyst layer is designed to be concave and ordered, which is conducive to the timely discharge of the generated heat. The MEA for a DEFC can be fabricated by gradually fabricating each layer of the MEA on an inner surface and an outer surface of a proton-exchange membrane (PEM) or by step-by-step dip coating on an anode support tube. The present disclosure can effectively improve the working capacity of the cell.

Abstract: A method and device for implementing USB endpoint multiplexing are disclosed. The USB device of the present disclosure supports at least two USB functional devices, and the number of the USB functional devices that are supported by the USB device is larger than the number of data endpoints of the USB device. The method includes: receiving a request for switching over USB functional devices, where the request carries a function identifier of a USB functional device selected by a user; searching for the USB functional device corresponding to the function identifier according to the function identifier; and switching the USB device to the searched USB functional device. The devices include: a USB device and a host. By multiplexing the USB endpoints, the present disclosure achieves an object of using one USB device as a multi-functional device, and hence saves the cost and enhances the user's experience.