Yuasa Corporation

Gs Yuasa Corporation

Yoshihiro Eguchi

Takehito Bogauchi

Tomonori Kishimoto

Mitsuo Yamane

Hiroe Nakagawa

Hirofumi Umetani

Ikumi Ban

A negative active material is characterized by being prepared by adding a lignin having a unit structure represented by the formula (I) as the main structure to a lead oxide. Since the lignin of the formula (I) is added, the negative active material can be prevented from shrinkage due to charge/discharge.(wherein Ris H, OH, COOH, SOH, SH, CH, COO, SO, RCH, (R)CH, or (R)CH; and Ris at least one member selected from among OH, COOR, SOH, and CHSOH.)

Negative active material, method of manufacturing its material, and lead acid battery

A separator for alkali-zinc battery comprising a microporous membrane having alkali resistance, a part of the porous membrane having highly persistent hydrophillic property and the remaining part having water repellent property. In the part having hydrophillic property, precipitation of ZnO can be controlled sufficiently because of its large persistency of hydrophilic property so that dendrite short-circuiting in the battery can be prevented satisfactorily. In the part having water repellent property, O.sub.2 gas is permeable well through it so that a decrease in capacity of battery can be avoided.

Separator for alkali-zinc battery

Manufacturing method of nickel plate and manufacturing method of

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Takatsuki, Japan

Yoshihiro Eguchi