Lead storage battery positive electrode plate taking 4BS-graphene as additive and preparation method of positive electrode plate

Abstract

The invention discloses a lead storage battery positive electrode plate taking 4BS-graphene as an additive and a preparation method of the positive electrode plate. The positive electrode plate comprises the raw materials of lead powder, 4BS, graphene, acetylene black and red lead; and the positive electrode plate has the main components of <beta>-PbO<2>, <alpha>-PbO<2> and graphene. According tothe lead storage battery positive electrode plate taking 4BS-graphene as the additive and the preparation method of the positive electrode plate, a seed crystal effect is played in positive electrodecuring by virtue of addition of 4BS, the size and uniform distribution degree of 4BS in the unprocessed positive electrode plate can be optimized, the relative contents and structures of the <alpha>-PbO<2> and <beta>-PbO<2> in the finished electrode plate can be adjusted, and beneficial influences to the performance, particularly prolonging of the service life, of the positive electrode of the lead acid battery can be realized; by adding graphene to the electrode material, the conductive performance of the electrode can be improved effectively, the deep layer active materials with the electrode micropore structure can be fully utilized, the discharge capacity is increased, and negative effects of relatively high content of <alpha>-PbO<2> in the positive electrode finished electrode plate to the positive electrode capacity caused by taking 4BS as the additive can be counteracted.

Description

technical field [0001] The invention relates to the technical field of secondary chemical power sources, in particular to a positive plate of a lead storage battery with 4BS-graphene as an additive and a preparation method thereof. Background technique [0002] As an important part of the new energy field, among many secondary batteries, lead-acid batteries are the batteries with the lowest price, the largest output and the widest application. However, with the development of lithium batteries and nickel-based batteries, the disadvantages of low specific energy and short cycle life will become obstacles to their further development and growth. As the key to the production of lead-acid batteries, the composition, morphology and production process of the positive electrode largely determine the specific capacity, specific energy and cycle life of the lead-acid battery, and are the technical core of the lead-acid battery manufacturing. [0003] The main components of the posit...

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Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the invention provides a kind of 4BS-graphene as additive lead storage battery positive plate and preparation method thereof, solved graphene and 4BS as additive, in the mechanical mixing operation with lead powder, due to different The material density, particle size and shape are different, so uniform mixing is difficult to achieve, and the contact between graphene and lead powder or 4BS is not close enough to take advantage of the high electrical conductivity of graphene. Conventional mechanical mixing operations can also easily cause graphene to agglomerate, resulting in positive electrode failure. The conductivity of different parts is different, resulting in different current densities during charging and discharging, so that the overall performance of the positive active material cannot be maximized.

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