Huawei’s lithium-ion battery conductive binder patent passed

According to the latest information, a new patent related to Huawei’s lithium battery was passed and was published by the State Intellectual Property Office. The name of the patent is “a conductive binder for lithium-ion batteries. According to the description, this patent uses polyvinyl alcohol, polyethylene glycol, polystyrene, starch, sodium alginate, etc.

As per the data, the value of graphene is 0.1%~10% of the total mass, the thickness of graphene particles is 5nm~50nm, and the D50 particle size is 50nm~5000nm. This invention uses two adhesives, the first adhesive accounts for 20%-50%, and the second adhesive uses materials such as polyacrylic acid and polyimide, which are combined with the first adhesive through chemical bonds.

The patent details that it has as a silicon particle, 2nd is graphene, and 3rd is a binder. Silicon particles are confined in this hollow structure, even if they expand, they will not lose performance.

According to the patent description, in order to increase the energy density of current lithium batteries, graphite anode materials are often replaced with alloy materials such as silicon.

After 50 cycles of the two-button prototype batteries made by this patent, the capacity retention rate is over 90%, and the discharge efficiency is as high as 97% and 98%, which means the battery’s internal resistance is still very small and there is no loss.

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(Via)