A kind of π-type-conjugated redox polymer modified lead storage battery and preparation method thereof

Abstract

The invention relates to the field of a lead-acid storage battery, and discloses a <pi>-type-conjugated oxidation reduction polymer modified lead storage battery and a preparation method therefor. Positive electrode lead paste of the battery comprises 98.5-99.5 parts of lead powder, 0.2-0.8 parts of additive and 0.3-0.7 parts of mixed polymer powder; and the mixed polymer powder is prepared from a <pi>-type-conjugated oxidation reduction polymer, a surface anti-oxidation functional group sulfonated arene polymer and single-wall carbon nanotubes. The active material of the lead storage battery comprises the surface-modified and anti-oxidation functional group conjugated oxidation reduction polymers, so that strong electronic storage capability and rapid electronic reaction speed are achieved; the polymers comprise available oxidation reduction nodes, so that relatively strong oxidation reduction activity is achieved; therefore, the lead storage battery has relatively high energy density, and the discharging time of the battery is obviously prolonged in a high-rate discharging condition of the battery; and meanwhile, the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the field of lead-acid storage batteries, in particular to a lead storage battery modified by a π-conjugated redox polymer and a preparation method thereof. Background technique [0002] Lead-acid batteries have a history of more than 150 years since their invention. Because of their high safety, stable performance, low manufacturing costs, and high recycling value, they are widely used in the national economy and people's lives. middle. However, at the same time, lead-acid batteries also have a series of problems such as low cycle life, low energy density utilization, and incomplete conversion of active substances resulting in capacity attenuation, which has become an important factor restricting lead-acid batteries from occupying a larger market. [0003] The conductivity of the electrodes in lead-acid batteries is an important factor affecting the performance of the plates. Good electrical conductivity shortens the formati...

AI Technical Summary

Problems solved by technology

As a new type of two-dimensional material, graphene has good electrical conductivity, thermal conductivity, mechanical properties, and low resistivity. It is used in batteries. Has no significant effect on early capacity fade

On the other hand, the cost of preparing graphene with fewer structural layers and stable structure is relatively high, which greatly increases the production cost of batteries.

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