摘要:
A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell comprises a plurality of very thin, alternating layers of an inorganic material and an organic material on a flexible, polymeric substrate. The layers are not laminated, but are formed on the substrate by a deposition or coating process and the thickness of any layer is less than 5 microns. The organic material is a hydrophobic polymer and the inorganic material is a metal oxide, nitride, a glass or silicon.
摘要:
A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell comprises a plurality of very thin; alternating layers of an inorganic material and an organic material on a flexible, polymeric substrate. The layers are not laminated, but are formed on the substrate by a deposition or coating process and the thickness of any layer is less than 5 microns. The organic material is a hydrophobic polymer and the inorganic material is a metal oxide, nitride, a glass or silicon,
摘要:
A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell, comprises a plurality of very thin layers of amorphous silicon nitride and a hydrophobic fluorocarbon polymer on a flexible, polymeric substrate. The layers are formed on the substrate by a deposition process such as sputtering. The thickness of any individual layer is less than one micron.
摘要:
A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell, comprises a plurality of very thin layers of amorphous silicon nitride and a hydrophobic fluorocarbon polymer on a flexible, polymeric substrate. The layers are formed on the substrate by a deposition process such as sputtering. The thickness of any individual layer is less than one micron.
摘要:
A method includes combining fumed silicon oxide with a metal to form silicon having an average particle size of less than approximately 100 nm. The silicon can be incorporated into an anode of a lithium ion cell.
摘要:
A method includes combining fumed silicon oxide with a metal to form silicon having an average particle size of less than approximately 100 nm. The silicon can be incorporated into an anode of a lithium ion cell.
摘要:
A separator for an electrochemical device comprises a porous, ion-permeable material coated, on a surface thereof, a thermally sensitive layer comprising a polymeric material secured with a cross-linked adhesive and an adhesion promoter. The separator can be prepared by disposing, on a surface thereof, a thermally sensitive layer comprising heat-fusible material, a cross-linkable adhesive and an adhesion promoter, all of which dispersed in a solvent having a polar component, a non-polar component and a high boiling point component.
摘要:
This invention relates to a heat sensitive polymer film and to a method for making the same. The film becomes substantially impermeable to air or ion flow above a predetermined temperature and is useful as a separator in electrochemical cells. The film comprises a microporous layer coated on at least one side with a layer of heat-fusible polymer particles.
摘要:
An electrochemical separator is formed insitu on an electrode surface within an electrochemical cell, preferably an alkaline cell cathode surface. The alkaline cell comprises a zinc anode, a and potassium hydroxide electrolyte. The cathode may comprise a cathode comprising manganese dioxide. The separator may be formed by coating an electrode surface preferably with a low molecular weight copolymer of polyvinyalcohol and polyvinylacetate. The film can be coagulated to form a permeable separator uniformly conforming to and covering the electrode surface irrespective of the shape and contour of the electrode. A separate protector disk can be inserted onto the top surface of the cathode to protect the cathode from shorting in the event that imperfections in the separator surface develop. The protector disk can have a protruding lip which surrounds and protects the inside corner edge of the cathode.
摘要:
A method of making a cathode includes decomposing a mixture comprising a metal naphthenate, e.g., cobalt naphthenate, and incorporating the decomposed mixture into the cathode. The cathode can be used, for example, in a metal-air battery and a fuel cell.