Lithium iron phosphate/multilayer graphene composite material and its preparation method and lithium ion battery using it
A multi-layer graphene, lithium-ion battery technology, applied in the field of materials, can solve the problems of lithium iron phosphate size uniformity, distribution uniformity, etc. to be improved, and achieves improvement of low electronic conductivity, strong metal ion load capacity, and easy control. Effect
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[0035] In order to better illustrate the process and solutions of the present invention, the following inventions will be further described in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0036] In the prior art, the preparation method of the composite of lithium iron phosphate and graphene is to add iron ions, lithium ions and phosphate ions together in a one-step method, and then chemical co-deposition to synthesize the precursor. The precursor distribution of this method is difficult to evenly distribute on the graphene surface, so the final lithium iron phosphate distribution is not uniform.
[0037] In order to solve the above-mentioned technical problems, the present invention discloses a preparation method of a composite material of lithium iron phosphate / multilayer graphene, comprising the following steps:
[0038] Step S1, prepa...
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