Carbon black modified water-based SBR lithium ion battery binder and preparation method thereof

A lithium-ion battery and binder technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unfavorable large-scale application, a large amount of manpower and material resources, and long time period, so as to prevent powder loss and increase energy density , long cycle life effect
CN108598482AInactive Publication Date: 2018-09-28HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI GUOXUAN HIGH TECH POWER ENERGY
Publication Date
2018-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a carbon black modified water-based SBR lithium ion battery binder and a preparation method thereof, and relates to the technical field of a lithium ion battery binder, whereinthe binder is prepared through the following steps: using styrene and butadiene as raw materials; bonding the conductive carbon black on an SBR molecular chain through an in-situ emulsion polymerization method, wherein the preparation method comprises adding an aqueous solution of sodium stearate to an aqueous surfactant solution to obtain an emulsified solution; then adding carbon black to disperse to obtain a carbon black emulsion system; dissolving an reducibility initiator and electrolyte in deionized water to obtain a reducing solution; adding the deionized water, the reducing solution,a molecular weight regulator SD-12 and styrene to the carbon black emulsion system, vacuumizing to the negative pressure, and then adding butadiene, cooling, and adding an oxidizing initiator to initiate a polymerization reaction. The binder of the present invention is used for battery preparation. In the case that no conductive carbon black is additionally added, the battery has a high cycle capacity, thereby increasing the additive proportion of the active material, and indirectly increasing the energy density of the battery system.
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Description

technical field

[0001] The invention relates to the technical field of lithium ion battery binders, in particular to a carbon black modified water-based SBR lithium ion battery binder and a preparation method thereof. Background technique

[0002] The rapid development of new energy vehicle technology has put forward higher and higher requirements for power batteries. Compared with lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries and other batteries, lithium-ion batteries have high energy density, high discharge voltage, and no memory effect. They are an ideal power source for new energy vehicles. However, as the market's requirements for the mileage of new energy vehicles gradually increase, and the bottleneck of the capacity increase of the positive and negative active materials of lithium-ion batteries is limited, the method of using a small amount of high-efficiency inactive materials to reduce battery quality and indirectly increase battery ...

Claims

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