Secondary battery anode material, preparation method thereof and battery containing anode material

A secondary battery and negative electrode material technology, applied in the direction of secondary batteries, battery electrodes, negative electrodes, etc., can solve the problem that it is difficult to ensure good contact between conductive carbon and active materials, conductive carbon cannot fully function, and kinetic performance deteriorates, etc. problems, to achieve the effect of easy large-scale production, easy control, and large-scale production
CN106099079AInactive Publication Date: 2016-11-09CONTEMPORARY AMPEREX TECH CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECH CO
Publication Date
2016-11-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of secondary batteries, in particular to a secondary battery anode material, a preparation method thereof and a battery containing the anode material. The secondary battery anode material comprises core particles, a connection carbon layer coating the surfaces of the core particles and conductive charcoal particles distributed on the surface of the connection carbon layer. The secondary battery anode material has the advantages that a macromolecular polymer is taken as an adhesive, and a small-particle carbon material layer is uniformly coated on the surface of an existing anode active material, so that an effective and stable conductive network can be formed in a pole piece, dynamics properties of the material are greatly improved, and a battery cell has good rate capability and quick charging capability.
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Description

technical field

[0001] The present application relates to the field of secondary batteries, in particular, to a negative electrode material for a secondary battery, a preparation method thereof and a battery containing the negative electrode material. Background technique

[0002] In the negative electrode material of the existing secondary battery, it is necessary to add conductive carbon such as SuperP and dry mix and disperse it in the process of making the electrode sheet, so as to form a conductive network in the negative electrode sheet and improve the kinetic performance of the negative electrode. However, due to the small particles of the conductive carbon material, it takes a long time for dry mixing to disperse evenly, and the conductive carbon cannot fully play its role. During the use of the secondary battery, as the number of cycles prolongs, due to the failure of the binder and the occurrence of particle rearrangement, it is difficult to ensure good contact bet...

Claims

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