摘要:
An electrochemical cell comprising a gas electrode, including a deposited layer, and a counter electrode. The gas electrode is an electrode that either utilizes a gas as the active material that is reduced by the gas electrode or produces a gas by oxidation at the gas electrode. In a preferred embodiment, the gas electrode is a thin film electrode including a deposited current collector and deposited active material oxidation or reduction layer. A control layer can be disposed between the gas electrode and the counter electrode to control the diffusion of electrolyte into the gas electrode. Methods for making electrochemical cells having gas electrodes are disclosed.
摘要:
Polymer matrix composite comprising a porous polymeric network; and a plurality of intumescent particles distributed within the polymeric network structure; wherein the intumescent particles are present in a range from 15 to 99 weight percent, based on the total weight of the intumescent particles and the polymer (excluding the solvent); and wherein the polymer matrix composite volumetrically expands at least 2 times its initial volume when exposed to at least one temperature greater than 135° C.; and methods for making the same. The polymer matrix composites are useful, for example, as fillers, thermally initiated fuses, and fire stop devices.
摘要:
An electrochemical cell comprising a gas electrode, including a deposited layer, and a counter electrode. The gas electrode is an electrode that either utilizes a gas as the active material that is reduced by the gas electrode or produces a gas by oxidation at the gas electrode. In a preferred embodiment, the gas electrode is a thin film electrode including a deposited current collector and deposited active material oxidation or reduction layer. A control layer can be disposed between the gas electrode and the counter electrode to control the diffusion of electrolyte into the gas electrode. Methods for making electrochemical cells having gas electrodes are disclosed.
摘要:
A silver-containing alkaline electrochemical cell and methods for producing the cell, wherein the cell includes a negative electrode, a positive electrode, a separator disposed between the electrodes, and an alkaline electrolyte, wherein the positive electrode is formed as a multi-layer composite including a silver-containing oxide layer and a barrier layer, initially free of silver-containing material, disposed between the silver-containing oxide layer and the separator for substantially reducing migration of silver ions to the separator and negative electrode.
摘要:
An air depolarized battery with an improved sealing member for sealing the air inlet port(s) of the battery before use is disclosed. The sealing member has areas of relatively high and low permeability, with an area of low permeability over at least a portion of an air inlet port. The sealing member may comprise a plurality of layers, where the area of highest permeability includes a portion of the lowest permeability layer that has a higher permeability than a surrounding portion thereof. The rate of flow of air through the low permeability area and into the battery can be easily modified to maintain a desired battery open circuit voltage during battery storage to allow activation of the battery within a short time after removal of the sealing member, while minimizing losses in discharge capacity before use.
摘要:
A silver-containing alkaline electrochemical cell and methods for producing the cell, wherein the cell includes a negative electrode, a positive electrode, a separator disposed between the electrodes, and an alkaline electrolyte, wherein the positive electrode is formed as a multi-layer composite including a silver-containing oxide layer and a barrier layer, initially free of silver-containing material, disposed between the silver-containing oxide layer and the separator for substantially reducing migration of silver ions to the separator and negative electrode.
摘要:
Various embodiments of a metal-air cell having a tab system that covers an air entry port of the metal-air cell are provided. In one representative embodiment the tab system includes polymer layer and an adhesive layer between the metal-air cell and the polymer layer. The tab system has a loss stiffness of less than 55,000 N/m at 20° C. to 25° C.