Preparation method of ferric pyrophosphate and application of ferric pyrophosphate in sodium-ion batteries

A technology of sodium ferric pyrophosphate and phosphoric acid, applied in the directions of phosphate, phosphorus oxyacid, secondary battery, etc., can solve the problem of high rate performance, poor cycle life and poor conductivity, poor repeatability, difficult to achieve large-scale production, phase purity It can achieve the effect of uniform morphology, excellent cycle stability and high surface electrochemical activity.
CN106340650AActive Publication Date: 2017-01-18CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2017-01-18

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Abstract

The invention discloses a preparation method of ferric pyrophosphate and application of the ferric pyrophosphate in sodium-ion batteries. The preparation method of the ferric pyrophosphate comprises two steps that FeH2P2O7 is firstly prepared through a liquid phase method and is evenly mixed with a sodium source, and then calcination is performed to obtain the ferric pyrophosphate. The method is simple in process, facilitates large-scale production, the prepared ferric pyrophosphate is uniform in particle size distribution, low in impurity content and superior in electrochemical performance and can serve as an anode material for preparing high-performance sodium-ion batteries.
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Description

technical field

[0001] The invention relates to a sodium iron pyrophosphate material, in particular to a preparation method of the sodium iron pyrophosphate material and its application as a positive electrode material of a sodium ion battery; it belongs to the field of sodium ion batteries. Background technique

[0002] Since the commercial production of lithium-ion batteries, lithium-ion batteries have been widely used in various fields, and have an absolute advantage in the field of mobile energy storage. However, due to the shortage of lithium metal resources in the world, large-scale energy storage fields such as electric vehicles and energy storage power stations require a large amount of raw materials, and the manufacturing cost of lithium-ion batteries is on the rise. In the field of energy storage, there is an urgent need for secondary batteries with excellent performance and low price to replace the current energy storage batteries. Sodium, which is in the same ma...

Claims

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