P2-type sodium ion battery layered positive electrode material as well as preparation method and application thereof

A sodium-ion battery and positive electrode material technology, applied in battery electrodes, electrode manufacturing, positive electrodes, etc., can solve the problems of low energy density and poor stability of positive electrode materials, and achieve improved electrochemical performance, good stability, and high energy density Effect
CN112490398AActive Publication Date: 2021-03-12江西省钒电新能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江西省钒电新能源有限公司
Publication Date
2021-03-12

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Abstract

The invention relates to a P2-type sodium ion battery layered positive electrode material as well as a preparation method and application thereof. The positive electrode material is Na0.67NixMnyAZO2,wherein A is one of Ti, Mg, Sn or Bi, x is greater than or equal to 0 and less than or equal to 0.5, y is greater than or equal to 0 and less than or equal to 1, and z is greater than or equal to 0 and less than or equal to 0.5. The preparation method comprises the steps of weighing raw materials according to a stoichiometric ratio by adopting a high-temperature solid-phase method, grinding, pressing into a ceramic chip, calcining in air at high temperature, and cooling to room temperature. The application comprises the steps of uniformly mixing the positive electrode material, conductive carbon black and polyvinylidene fluoride according to a mass ratio ranging from 8: 1: 1 to 6: 3: 1, coating a thin sheet by using an aluminum foil as a current collector, and drying in a vacuum drying oven to form a positive plate; and assembling the sodium ion battery in a glove box filled with argon by taking metal sodium as a negative electrode, GF / D as a diaphragm and a sodium perchlorate electrolyte. The positive electrode material prepared by the invention has a simple phase change process, high energy density and good stability; and the method is simple, easily available in raw materials, low in price, environment-friendly and suitable for large-scale production.
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Description

technical field

[0001] The invention belongs to the technical field of sodium ion battery materials, and in particular relates to a P2 type sodium ion battery layered positive electrode material, a preparation method and an application. Background technique

[0002] Due to the rapid consumption of fossil fuels and environmental pollution issues, it is necessary to reduce the use of clean and renewable energy through energy storage technology. Na-ion batteries are considered as a promising energy storage system due to their low cost, good safety performance, and abundant sodium resources, and the development of electrode materials plays an important role in improving their performance.

[0003] In fact, more than 60% of the performance of Na-ion batteries is controlled by the cathode material. To date, a large number of cathode materials have been extensively studied, including layered transition metal oxides, polyanionic compounds, and Prussian blue analogs, etc. Among the...

Claims

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