Lithium battery formed on basis of lithium nickel manganese oxide and lithium titanate and preparation method of lithium battery

Abstract

The invention discloses a lithium battery formed on the basis of lithium nickel manganese oxide and lithium titanate and a preparation method of the lithium battery. The lithium battery comprises an aluminum-plastic film casing, an anode lug, a cathode lug and a tab film, wherein the aluminum-plastic film casing contains a battery cell and electrolyte; the battery cell comprises an anode piece, a diaphragm and a cathode piece; materials of the anode piece comprise an anode slurry coating consisting of a positive active material, a binding agent, a conductive agent and a solvent and an anode current collector; the positive active material adopts an Al2O3 coating of lithium nickel manganese oxide; the binding agent adopts one or two of polyvinylidene fluoride and polytetrafluoroethylene; the conductive agent adopts one or more of conductive carbon black, conductive graphite and carbon nanotubes; the solvent adopts N-methyl-2-pyrrolidinone; the anode current collector adopts an aluminum foil; the cathode piece adopts an aqueous cathode or an oil-based cathode. According to the designed lithium battery, the purposes of improvement of the reversible specific capacity, the energy density and the rapid charge-discharge capability, the cycle performance and the safety performance of the battery are achieved while the production cost is reduced.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium battery based on lithium nickel manganese oxide and lithium titanate and a preparation method thereof. Background technique [0002] With the rapid development of economy and society and the continuous progress of science and technology, the problems of energy shortage and deterioration of ecological environment have become the strategic cores affecting the sustainable development of human society. This has prompted people to look for clean and renewable new energy. As the "carrier" of portable energy in today's society, lithium-ion batteries are widely used in energy storage, communication, and national defense construction, especially in the promotion of new energy vehicles, which have risen to the height of national strategy. At present, the positive electrode materials of commercial lithium-ion batteries are mainly LiCoO2, LiFePO4, LiCoNiMnO2, LiMn2O4, and the negative electrod...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the production cost of lithium ion battery is high, the reversible specific capacity of the battery is low, the energy density and fast charging and discharging ability are not enough, and the cycle performance and safety performance are not enough. The lithium battery composed of lithium and its preparation method solve the problems of increasing the reversible specific capacity, energy density and rapid charge and discharge capacity of the battery while reducing the production cost, and improving the cycle performance and safety performance

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