Prussian blue transition metal cyanide, preparation method thereof, and positive pole piece, secondary battery, battery pack and device related to prussian blue transition metal cyanide

A technology of transition metals and Prussian blue, applied in metal cyanide, secondary batteries, battery electrodes, etc., can solve the problems of poor energy density and low gram capacity of sodium-ion batteries, which affect the commercial application of sodium-ion batteries, and achieve improvement The effect of active ion transport performance and electronic conductivity, increasing particle size and powder compaction density, and high energy density
CN112259730AActive Publication Date: 2021-01-22JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
Publication Date
2021-01-22

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Abstract

The invention belongs to the technical field of energy storage devices, and provides a prussian blue transition metal cyanide, a preparation method thereof, and a positive pole piece, a secondary battery, a battery pack and a device related to the prussian blue transition metal cyanide. The prussian blue transition metal cyanide comprises secondary particles, wherein the secondary particles comprise a plurality of primary particles; and the primary particles are in a spherical shape or a sphere-like shape. The prussian blue transition metal cyanide has the problem of relatively low gram volume, so that the energy density of the sodium ion battery is relatively poor, and the commercial application of the sodium ion battery is influenced. The secondary particles can increase the particle granularity and the powder compaction density, can further increase the compaction density of the positive pole piece, and improve the active ion transmission performance and the electronic conductivityof a positive pole piece, so that the energy density and the rate capability of the secondary battery adopting the secondary particles can be improved.
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Description

technical field

[0001] The application belongs to the technical field of energy storage devices, and in particular relates to a Prussian blue transition metal cyanide, a preparation method thereof, and related positive electrode sheets, secondary batteries, battery modules, battery packs and devices. Background technique

[0002] In recent years, with the large-scale promotion of lithium-ion batteries in emerging fields such as new energy vehicles and electrochemical energy storage around the world, the abundance of lithium and other precious metal resources such as cobalt and nickel has gradually aroused people's concerns. This is due to the rapid increase in demand that can reduce the reserves of these resources, or significantly increase the cost of extraction or mining. Therefore, the development of new electrochemical energy storage systems with high resource abundance to achieve low energy storage costs has received more and more attention.

[0003] Secondary batterie...

Claims

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