Dai-ichi Kogyo Seiyaku Co., Ltd.

Yuasa Battery Co., Ltd.

Japan Atomic Energy Research Institute

Yuasa Corporation

Shyuiti Izuti

Tomohiko Noda

Shigeo Mori

Kazunari Takeda

Hiroshi Imachi

Michiyuki Kono

Kenji Motogami

Takashi Sasaki

Isao Ishigaki

A galvanic cell is in which at least one of the negative electrode, the positive electrode and the separator comprises a solid electrolyte prepared by doping an ionic compound to an organic polymer. The organic polymer is a polymer obtained by crosslinking an organic compound having a structure of the general formula (I):

Galvanic cell

The improved battery for reversible operation at ambient temperature comprises a negative electrode, a composite positive electrode which is composed of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity, an electrochemically active material and, optionally, an electron conductive material, and an electrolyte which is made of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity. The improvement is such that said composite positive electrode and said electrolyte are formed by exposure to an active radiation such as ultraviolet rays or ionizing radiation. Thanks to the improvement in electrolyte and positive electrode, the battery can be fabricated with great ease, is entirely free from the possibility of electrolyte leakage and has high long-term reliability and safety.

Battery

At least one of the negative electrode, the positive electrode and the separator in the galvanic cell comprises a solid electrolyte prepared by doping an ionic compound to an organic polymer. The organic polymer is a polymer obtained by crosslinking an organic compound having a structure of the general formula (I):

A primary invention is a solid polymer electrolyte including an ionic salt and a compound able to dissolve the ionic salt and having a crosslink network structure. A crosslink network structure is formed by polymerizing a two-functional acryloyl compound having two acryloyl groups with a one-functional acryloyl compound having one acryloyl group. In this solid polymer electrolyte, the crosslink network structure has a skeleton in which the one-functional acryloyl compound spreads into branches. Since molecular movement of this branched skeleton is active, its flexibility is improved.

Solid polymer electrolyte

Growing community of inventors

Shiga, Japan

Shyuiti Izuti