Abstract:
The invention provides a battery separator comprising a porous resin film and a crosslinked polymer supported thereon and having iminodiacetic acid groups in side chains of the polymer chains. The iminodiacetic acid group is preferably represented by the formula wherein M1 and M2 are each independently a hydrogen atom, a lithium atom, a potassium atom, a sodium atom, or triethylamine. It is preferred that the layer of the crosslinked polymer is substantially nonporous or solid, and ion conductive, and that the crosslinked polymer has in the molecule oxetanyl groups which are capable of cation polymerization.
Abstract:
An electric double layer capacitor includes electrodes mainly made of porous carbons. The electrodes include aggregates made of particles of metal or metal compound provided among the porous carbons. Moreover, holes are formed among the particles of metal or metal compound forming the aggregates.
Abstract:
The invention provides a nonaqueous electrolyte secondary battery having a cathode and an anode arranged so as to be opposite to each other, and an electrolyte layer put therebetween; wherein the cathode comprises: (a) a conductive polymer and (b) at least one selected from the group consisting of a polycarboxylic acid and a metal salt thereof, and wherein the anode comprises a material into which a base metal or ions thereof can be inserted and from which a base metal or ions thereof can be extracted. The invention further provides a cathode sheet for use in the nonaqueous electrolyte secondary battery mentioned above.
Abstract:
Provided is a separator for nonaqueous electrolyte electricity storage devices that includes an improved porous epoxy resin membrane. In the separator for nonaqueous electrolyte electricity storage devices, a ratio I/Io between a peak intensity Io of an absorption peak present at 1240 cm−1 in an infrared absorption spectrum of the porous epoxy resin membrane and a peak intensity I of an absorption peak present at 1240 cm−1 in an infrared absorption spectrum of the porous epoxy resin membrane having been subjected to an acetic anhydride treatment is 1.0 or more and 2.4 or less. The amount of active hydroxyl groups present in the porous epoxy resin membrane can be evaluated by the value of the ratio I/Io.
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:
A battery separator (13) of the present invention includes a porous film (12) serving as a substrate and a crosslinked polymer layer (11) supported on the porous film (12). The crosslinked polymer layer (11) contains a crosslinked polymer and inorganic particles, and is non-porous. The crosslinked polymer is obtained by reacting a reactive polymer having a functional group in its molecule with a polyfunctional compound reactive with the functional group so as to crosslink at least a part of the reactive polymer. A lithium ion secondary battery of the present invention includes a positive electrode (14), a negative electrode (15), the battery separator (13) of the present invention disposed between the positive electrode (14) and the negative electrode (15), and a non-aqueous electrolyte solution. The battery separator (13) is disposed so that the porous film (12) faces the negative electrode (15) and the crosslinked polymer layer (11) faces the positive electrode (14).
Abstract:
The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a reactive group containing active hydrogen with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.
Abstract:
The present invention relates to a reactive polymer layer-supported porous film for battery separator, including: a porous film substrate; and a reactive polymer layer supported on the porous film substrate, the reactive polymer layer having a thickness of 2 μm or less and being obtained by a crosslinking reaction between a polyfunctional isocyanate and a crosslinkable polymer having both a reactive group capable of reacting with an isocyanate group and a cationically polymerizable functional group in the molecule thereof, in which the reactive polymer layer has a plurality of through-holes having an average pore diameter of 5 μm or less.
Abstract:
The present invention relates to a crosslinking polymer-supported porous film for battery separator, including: a porous film; and a crosslinking polymer supported on the porous film, the crosslinking polymer having a plurality of cation-polymerizable functional groups in the molecule thereof and having oxyalkylene groups represented by general formula (I): in which the Rs may be the same or different and each independently represent a hydrogen atom or a methyl group, and n represents an integer of 4 to 9, in a side chain thereof.
Abstract:
A solid electrolytic capacitor comprising: an anode of valve metal or of an alloy of which main component is the valve metal; a dielectric layer formed by anodizing the anode; an electrolyte layer formed on the dielectric layer; and a cathode formed on the electrolyte layer; wherein the cathode comprises a carbon layer containing coated carbon particles in which at least a part of the surface of carbon particles is coated with metal and/or metal compound having higher conductivity than carbon.