Preparation method for nanometer copper-tin nickel alloy cathode material, nanometer copper-tin nickel alloy cathode material and lithium ion battery

• Main Authors: CHU DAOBAO, YUAN XIMEI
• Format: Patent
• Language: Chinese; English
• Published: 24.04.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a preparation method for a nanometer copper-tin nickel alloy cathode material, the nanometer copper-tin nickel alloy cathode material and a lithium ion battery. The preparation method comprises the steps as follows: preparing a copper electroplating solution; electrically depositing nanometer copper; preparing a tin nickel electroplating solution; electrically depositing tin nickel; and washing, drying and slicing an electroplated copper foil. The lithium ion battery is made by adopting the nanometer copper-tin nickel alloy cathode material, so that the volume effect of tin nickel alloy in the lithium intercalation and deintercalation processes is avoided, large tin blocks are prevented from being agglomerated in the lithium deintercalation process, the charge and discharge performance of the battery is improved, and good cycle performance and stability are obtained; and the preparation method is simple in process and easy and convenient to operate, thereby providing conditions for ind