Abstract:
The present invention provides a method for producing a separator for nonaqueous electrolyte electricity storage devices. The method allows: avoidance of use of a solvent that places a large load on the environment; relatively easy control of parameters such as the porosity and the pore diameter; and a high electrochemical stability of a resultant separator for nonaqueous electrolyte electricity storage devices. The present invention relates to a method for producing a separator for nonaqueous electrolyte electricity storage devices that has a thickness ranging from 5 to 50 µm. The method of the present invention includes the steps of: preparing an epoxy resin composition containing an epoxy resin whose molecular structure has no aromatic ring, a curing agent, and a porogen; forming a cured product of the epoxy resin composition into a sheet shape or curing a sheet-shaped formed body of the epoxy resin composition, so as to obtain an epoxy resin sheet; and removing the porogen from the epoxy resin sheet by means of a halogen-free solvent.
Abstract:
The present invention aims to provide a method for producing a separator for nonaqueous electrolyte electricity storage devices, the method allowing avoidance of use of a solvent that places a large load on the environment, and also allowing relatively easy control of parameters such as the porosity and the pore diameter. The present invention relates to a method for producing a separator for nonaqueous electrolyte electricity storage devices that has a thickness ranging from 10 to 50 µm, the method including the steps of: producing an epoxy resin composition containing an epoxy resin, a curing agent, and a porogen; forming a cured product of the epoxy resin composition into a sheet shape or curing a sheet-shaped formed body of the epoxy resin composition, so as to obtain an epoxy resin sheet; and removing the porogen from the epoxy resin sheet by means of a halogen-free solvent.
Abstract:
Methods of forming a polymeric structure having a plurality of cells therein that include contacting a polymeric material that includes a first phase and a second phase with a composition comprising carbon dioxide to form the polymeric structure having a plurality of cells therein are described. Polymeric materials and microelectronic devices formed by such methods are also described.
Abstract:
Un film polymère microporeux très poreux comprend un halopolymère dans lequel les unités à répétition sont -(CnH2n)- et -(CmX2m)- dans lesquelles chaque X représente indépendamment du fluor ou du chlore, les valeurs de n et m étant supérieures à un et inférieures à six. Le film est le résultat premièrement d'un traitement par fusion d'un mélange du halopolymère, de plus de 150 parties en poids d'un sel extractible et de pas plus de 80 parties en poids d'un polymère extractible pour 100 parties en poids de halopolymère, ledit polymère extractible n'étant pas mélangé complètement et de manière homogène avec le halopolymère, et étant moins visqueux que le halopolymère lorsqu'ils sont tous les deux fusionnés, de sorte que les surfaces du film résultant du traitement par fusion soient riches en polymère extractible, et deuxièmement de l'extraction d'au moins un peu du sel extractible pour rendre le film poreux, et de l'extraction d'au moins un peu dudit polymère pour donner au film une porosité de surface. Ledit film a une porosité supérieure à 50 % en volume et habituellement de l'ordre de 60 à 70 %. On peut utiliser ledit film comme séparation d'une cellule électrochimique par exemple d'une batterie ayant une anode au lithium et un électrolyte de chlorure de thionyle. On a en outre découvert que l'on peut obtenir des porosités élevées et de bonnes propriétés électriques, par l'utilisation comme polymère extractible d'un matériau ayant une masse moléculaire inférieure à un million, par exemple un oxyde de polyéthylène d'une masse moléculaire d'environ 100 000.
Abstract:
@ The invention provides microporous polymer films which comprise a halopolymer in which the repeat units are - (C n H 2n )- and -(C m X 2m )-, where each X independently represents fluorine or chlorine and the values of n and m are more than one and less than six. The films of the invention can be suitable for use in high temperature applications and can be substantially inert to certain chemically agressive substances such as alkali and alkaline earth metals. The films find particular application in electrochemical cells comprising a lithium anode and thionyl chloride electrolyte.
Abstract:
본 발명은 내열성 및 절연성이 우수하고, 또한 외력을 가하여 소정의 형상으로 변형시킨 후, 외력을 제거하여도 소정의 형상을 유지할 수 있는 전기 절연성 수지 시트를 제공하는 것을 목적으로 한다. 본 발명의 전기 절연성 수지 시트는, 공공률이 10 내지 60%이며, 23℃에서 5% 신장되어 10분간 유지한 때의 응력 완화율이 20% 이상이며, 또한 절연 파괴 전압이 25kV/mm 이상이다.