Lithium-ion battery with excellent electrochemical performance

Abstract

The invention relates to a lithium ion battery with excellent electrochemical performance, belonging to the technical field of conductive materials. With Li 2 CO 3 , NiCO 3 2Ni(OH) 2 4H 2 O, MnO 2 , Cr(NO 3 ) 3 9H 2 O is the raw material weighed in proportion, add an appropriate amount of distilled water to dissolve, stir at a constant temperature at 28-45°C, add citric acid while stirring, and continue stirring until it becomes gel, dry at 75-90°C, and then Pre-fire at 420-480°C for 4-8h, then sinter at 800-950°C for 5-15h, after cooling to room temperature, grind it into powder to be the positive electrode material, and form the positive electrode material and negative electrode material to form a battery, which is the finished thin battery . Applying the invention to the processing of thin batteries has the advantages of high capacity, high stability, good cycle and rate performance.

Description

technical field [0001] The invention relates to a lithium ion battery with excellent electrochemical performance, belonging to the technical field of conductive materials. Background technique [0002] The application prospect of lithium-ion batteries is very broad. According to statistics, ten years ago, lithium-ion batteries accounted for more than 70% of the batteries used in mobile phones, and China's mobile phone users ranked first in the world. As the world's largest and growing mobile phone user, the research data of the "China Report Hall" website shows that the rechargeable lithium-ion secondary battery market is huge and has not yet been fully developed. Today, with the continuous improvement of innovative science and technology and people's living needs, large-capacity, high-power lithium-ion power batteries will become an ideal green power source for electric vehicles. [0003] Lithium-ion batteries can actually be regarded as a concentration battery. The positi...

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Problems solved by technology

[0013] The negative electrode materials mainly include carbon materials, graphitized carbon and alloy materials. Metal lithium is used as the negative electrode of lithium batteries, and its theoretical specific capacity can reach 3860mAh / g. Hidden danger

The use of lithium alloy as a negative electrode material can well avoid the generation of lithium dendrites and improve the safety of the battery, but it also has the disadvantage of huge volume changes before and after lithium intercalation and extraction, and the material is pulverized during the cycle. Electrical contact cannot occur between current collectors, resulting in rapid capacity decay

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