Negative active material, method of manufacturing its material, and lead acid battery
AssigneeGS Yuasa Corporation
InventorsHirofumi Umetani, Ikumi Ban, Yoshihiro Eguchi
Life of this patent
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Abstract
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 R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2; and R2 is at least one member selected from among OH, COOR, SO3H, and CH2SO3H.)
Claims11
A negative active material, comprising:
- a lead oxide, and
- a lignin having a unit structure represented by the formula (I) as the main structure.
- (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2;
- and R2 is at least one member selected from among OH, COOH, SO3H, and CH2SO3H.)
A negative active material, comprising:
- a lead oxide, and
- a lignin having a unit structure represented by the formula (II) as the main structure.
- (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2;
- and R2 is at least one member selected from among OH, COOH, SO3H, and CH2SO3H.)
A method of manufacturing a negative active material, comprising the step of adding at least a lignin having a unit structure represented by the formula (I) as the main structure to a lead oxide.
- (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2;
- and R2 is at least one member selected from among OH, COOH, SO3H, and CH2SO3H.)
A method of manufacturing a negative active material, comprising the step of adding at least a lignin having a unit structure represented by the formula (II) as the main structure to a lead oxide.
- (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2;
- and R2 is at least one member selected from among OH, COOH, SO3H, and CH2SO3H.)
A lead acid battery having a positive electrode and a negative electrode,
- in which a negative active material composing the negative electrode is comprised of a lead oxide and a lignin having a unit structure represented by the formula (I) as the main structure.
- (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2;
- and R2 is at least one member selected from among OH, COOH, SO3H, and CH2SO3H.)
A lead acid battery having a positive electrode and a negative electrode,
- in which a negative active material composing the negative electrode is comprised of a lead oxide and a lignin having a unit structure represented by the formula (II) as the main structure.
- (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO−, SO3−, R2C6H4, (R2)2C6H3, or (R2)3C6H2;
- and R2 is at least one member selected from among OH, COOH, SO3H, and CH2SO3H.)
Dependencies are inferred from the claim text.