Prussian blue cathode material, preparation method thereof, and electrochemical energy storage device

A positive electrode material, Prussian blue technology, applied in the field of energy storage devices, can solve problems such as low solubility, different particle sizes, and collapse of the chemical skeleton structure

A positive electrode material, Prussian blue technology, applied in the field of energy storage devices, can solve problems such as low solubility, different particle sizes, and collapse of the chemical skeleton structure

CN109698345BActive Publication Date: 2021-05-11CONTEMPORARY AMPEREX TECH CO
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  • Prussian blue cathode material, preparation method thereof, and electrochemical energy storage device
  • Prussian blue cathode material, preparation method thereof, and electrochemical energy storage device
  • Prussian blue cathode material, preparation method thereof, and electrochemical energy storage device

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preparation example Construction

[0023] The preparation method of the Prussian blue positive electrode material according to the second aspect of the present application is used to prepare the Prussian blue positive electrode material described in the first aspect of the present application, comprising the steps of: (1) dissolving the additive and the M metal salt in a solvent, Form a complex of M metal salt and additives, and then add an alkaline solution to adjust the pH value to 2 to 6 to obtain solution 1; (2) dissolve the hexacyanometallic salt formed by metal M' and metal A in a solvent, Solution 2 is obtained; (3) Solution 1 is slowly added dropwise to Solution 2 to obtain a mixed solution, and after a certain reaction time, aging is obtained to obtain a precipitate, which is washed and dried to obtain a molecular formula of A x m c [M'(CN) 6 ] y Prussian blue cathode material, where A is H + , Li + 、Na + 、K + , NH 4 + One or more of them, M is a transition metal, M' is a transition metal, 0<x≀...

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Abstract

The present application provides a Prussian blue cathode material, a preparation method thereof, and an electrochemical energy storage device. The molecular formula of the Prussian blue cathode material is A x M c [M'(CN) 6 ] y , where A is H + , Li + , Na + , K + , NH 4 + One or more of them, M is a transition metal, M' is a transition metal, 0

Description

technical field [0001] The present application relates to the field of energy storage devices, in particular to a Prussian blue positive electrode material, a preparation method thereof, and an electrochemical energy storage device. Background technique [0002] In recent years, with the rapid development of energy storage technology, sodium-ion batteries have become a hot spot in the research of electrochemical energy storage technology because of their rich resources, environmental friendliness and low cost; and their cathode materials are one of the key factors restricting the application of sodium-ion batteries . Prussian blue and its derivatives have a suitable open frame structure, which can be Na + It provides fast-transporting ion channels and is an excellent cathode material for sodium-ion batteries. [0003] However, the solubility of Prussian blue and its derivatives in aqueous solution is extremely low, and the reaction speed of metal cyanide and free metal cat...

Claims

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Application Information

Patent Timeline
11 May 2021
Publication
CN109698345B
IPC
H01M4/58; H01M4/62; H01M10/054
CPC
H01M4/58; H01M4/624; H01M10/054; Y02E60/10
Inventors
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