Bridgestone Corporation

Seiko Electronic Components Ltd.

Tadashi Fuse

Yoshitomo Masuda

Masao Ogawa

Kinya Suzuki

Shinichi Toyosawa

Hideharu Daifuku

Katsuhiko Arai

Tetsuro Amano

Takahiro Kawagoe

Ryota Fujio

Takashi Kitamura

Toyoo Harada

Tadashi Nakajima

Tadaaki Miyazaki

Yuko Maeda

Shigeru Kijima

Isamu Shinoda

There is provided a polyaniline having a thickness of 0.3 to 5 mm which is suitable for an electronic material, particularly for an electrode material in a cell. Also provided is a cell comprising a positive electrode, a negative electrode and an electrolyte in which the polyaniline having a thickness of 0.3 to 5 mm is employed in at least one of the positive and negative electrodes, the cell having a high energy density and good cell performance stable for a long period of time.

Polyanilines, process for the preparation thereof and cells using them

A lithium cell comprising a negative electrode containing lithium, a positive electrode, and an electrolyte disposed between the positive and negative electrodes is improved in internal resistance and shelf life when the negative electrode is surface treated with a composition containing from more than 1% to 5% by weight of water.

Lithium cells

A lithium cell comprising a negative electrode containing lithium, a positive electrode, and an electrolyte disposed between the positive and negative electrodes is improved in internal resistance and shelf life when the negative electrode is surface treated with water, lithium hydroxide, a PF.sub.6 ion-containing compound, or an AsF.sub.6 ion-containing compound.

An electric cell comprising a positive electrode, a negative electrode, and an electrolyte maintains excellent performance when the positive electrode is an electro-conductive polymer composite including a mesh stainless steel having a wire diameter of about 35-120 .mu.m and an electro-conductive polymer, typically polyaniline, integrally deposited onto the mesh by electrolytic polymerization. A container having the elements received therein is provided with a vent mechanism.

Electric cells

An electric cell comprises a positive electrode, a negative electrode and an electrolytic solution, characterized in that a positive active material of the positive electrode is a polyaniline, a negative electrode active material of the negative electrode is lithium or a lithium alloy containing 4.times.10.sup.-3 to 170.times.10.sup.-3 mol of effective lithium which is capable of electrochemical occlusion and release upon charging and discharging per g of the polyaniline used as the positive electrode active material, and said electrolytic solution is an non-aqueous electrolytic solution containing an electrolyte of more than 1 mol/l to less than 6 mol/l in a non-aqueous solvent.

Electric cells utilizing polyaniline as a positive electrode active

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Kodaira, Japan

Tadashi Fuse