Metal positive electrode and battery based on metal positive electrode

Abstract

The invention discloses a metal positive electrode. The metal positive electrode is prepared from a mixture of a metal material and a positive electrode material for adjusting potential, or the positive electrode is formed by compounding the metal material and at least one layer of positive electrode material for adjusting potential. The invention also discloses a battery based on the metal positive electrode, and a laminated battery based on the metal positive electrode. According to the metal positive electrode, the metal material is used as the positive electrode active material, and the positive electrode material for adjusting the potential is mixed in the metal material, or the metal material is compounded with at least one layer of positive electrode material for adjusting the potential, so that the potential of the positive electrode can be effectively improved to meet the energy storage requirement of a battery; and by utilizing the characteristic of high energy density of themetal material, the energy density of the battery can be effectively improved, and the weight and the volume of the battery can be effectively reduced under the same capacity requirement.

Description

technical field [0001] The invention belongs to the technical field of energy storage equipment, in particular to a metal positive electrode and a battery based on the metal positive electrode. Background technique [0002] A lithium-ion battery is a secondary battery system in which two different lithium intercalation compounds that can reversibly insert and extract lithium ions are used as the positive electrode and the negative electrode of the battery, respectively. When charging, lithium ions are extracted from the lattice of the positive electrode material, and inserted into the lattice of the negative electrode material after passing through the electrolyte, making the negative electrode rich in lithium and the positive electrode poor in lithium; during discharge, lithium ions are extracted from the lattice of the negative electrode material, and after The electrolyte is then inserted into the lattice of the positive electrode material, making the positive electrode r...

AI Technical Summary

Problems solved by technology

[0004]Currently marketed lithium battery cathode materials include lithium cobaltate, lithium manganate, lithium iron phosphate and ternary materials, although they can meet the requirements of use, but There are disadvantages of low energy density, resulting in low energy density of lithium batteries, and the following problems:

[0005]1) The energy density is low. When the same energy storage capacity is achieved, the weight of the battery is heavier and the volume is larger;

[0006]2) The battery life is poor. If it is used in electric vehicles, the problem of insufficient battery life is common;

[0007]3) The safety is poor. This issue is still controversial, because the materials used to make batteries are not stable, and they are indeed prone to explosion

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