Nippon Oil Company

Seiichi Akita

Nobuyuki Kuroda

Masanobu Suga

Kazuo Matsuura

Hiroshi Kobayashi

Yutaka Shikatani

Izuru Sugiura

A method for producing a cross-linked polyvinyl alcohol separator having a film of cross-linked polyvinyl alcohol for an alkali-zinc secondary battery, and a cross-linked polyvinyl alcohol separator produced by the method are disclosed. The method includes the steps of:

Method of producing a cross-linked polyvinyl alcohol separator for an

According to the present invention there is provided a negative zinc electrode for an alkaline storage battery, comprising an electrode using zinc as an active material and a polymer layer which is substantially in direct contact with the electrode, the polymer layer containing at least a polymer having a crosslinked structure. There is also provided an alkaline storage battery using such negative zinc electrode and in which the occurrence of dendrites and shape change is suppressed.

Zinc electrode for alkaline storage battery

A negative zinc electrode for an alkaline storage battery capable of suppressing the occurrence of dendrite and shape change is provided. The negative zinc electrode comprises an electrode using zinc as an active material and a polymer layer formed substantially in direct contact with the electrode, the polymer layer comprising a polymer having an oxygen permeability constant of not less than 1.times.10.sup.-10 cm.sup.3 (STP) cm.sup.-1 s.sup.-1 cmHg.sup.-1.

The invention provides a specific polymeric solid electrolyte (ionically conductive polymer) having excellent physical properties, and a process therefor. The polymeric solid electrolyte can be obtained by reacting an alkali metal salt and/or ammonium salt, a non-aqueous organic solvent, a polyfunctional acrylate compound and a particular polyether macromonomer in the presence of a radical polymerization initiation accelerator and a radical polymerization initiator. The polymeric solid electrolyte has high ionic conductivity so that it can be employed in useful lithium batteries, plastic batteries, large-capacity capacitors, electrochromic displays and it can also be used for the 100% solidification of other electronic devices.

Polymeric solid electrolytes and production process thereof

The invention provides a process for readily preparing polymeric solid electrolyte, i.e., ion conductive polymer having excellent properties. The process of the invention comprises steps of subjecting at least one of the following component A and component B to contain an alkali metal salt and/or an ammonium salt and mixing the components A and the component B.

Preparation process of polymeric solid electrolyte

A polymer composition which is superior in processability, exhibits an extremely superior electroconductive characteristic when doped using an electron acceptor, and which comprises.

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Fujisawa, Japan

Seiichi Akita