Lithium manganese phosphate or lithium manganese silicate power cell, positive and negative pole manufacturing method thereof

Abstract

The invention discloses a lithium manganese phosphate or lithium manganese silicate power type battery and a method for manufacturing an anode and a cathode of the battery. The battery comprises the anode and the cathode; a material for preparing the anode comprises lithium manganese phosphate or lithium manganese silicate; and a material for preparing the cathode comprises lithium titanate. The method for manufacturing the anode comprises the following steps that: 0.1 to 3.5 weight portions of acacia and 0.1 to 3 weight portions of modified polyethylene glycol oxide are added into 80 weight portions of deionized water and subjected to high-speed stirring for 40 minutes; the materials are added with 3 to 7.5 weight portions of a conducting agent and subjected to high-speed stirring for 1 hour; the materials are added with 100 weight portions of a lithium manganese phosphate or lithium manganese silicate powdery material and subjected to high-speed stirring for 2 hours to obtain coating slurry of an active material of the anode; and the coating slurry is used for coating and manufacturing a polar sheet. The invention initially provides a lithium ion secondary battery system which is formed by the lithium manganese phosphate or lithium manganese silicate anode and the lithium titanate cathode and has safety and high-efficiency discharging capacity.

Description

technical field [0001] The invention relates to a battery, in particular to a lithium manganese phosphate or lithium manganese silicate power battery and a method for manufacturing the positive and negative electrodes thereof. Background technique [0002] A chemical cell is a cup, tank, or other container or part of a composite container that contains an electrolytic solution and metal electrodes to generate an electric current. With the advancement of society, chemical batteries are used in more and more fields, including current electric vehicles and hybrid electric vehicles. [0003] The battery systems used in the electric vehicles and hybrid electric vehicles include nickel-metal hydride battery systems, lithium cobalt oxide battery systems, lithium manganese oxide battery systems, ternary material (nickel-cobalt-manganese-lithium) battery systems, and lithium iron phosphate battery systems. [0004] The shortcomings of the above battery systems are the low battery vo...

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Problems solved by technology

[0006] However, the lithium manganese phosphate or lithium manganese silicate power battery uses graphite material as the negative electrode of the battery, and the graphite material has hidden dangers of burning and deformation, resulting in the lithium manganese phosphate or lithium manganese silicate power battery being still unsafe on the whole. and, when applied to high-power power products, such as electric vehicles, the discharge capacity of lithium batteries using graphite materials as electrodes is insufficient

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