Method for preparing nanowire-shaped lithium-rich manganese-based anode materials

A lithium-rich manganese-based, positive electrode material technology, applied in the direction of battery electrodes, electrical components, electrochemical generators, etc., can solve the problem of poor electronic conductivity and ion conductivity, large irreversible capacity in the first cycle, and increased irreversible capacity, etc. problems, to achieve the effect of improving electrochemical performance, alleviating the drop of discharge voltage plateau, and facilitating intercalation and extraction
CN106058239AActive Publication Date: 2016-10-26SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI UNIVERSITY OF ELECTRIC POWER
Publication Date
2016-10-26

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Abstract

The invention relates to a method for preparing nanowire-shaped lithium-rich manganese-based anode materials. The method includes steps of (1), dissolving soluble cobalt salt, nickel salt and lithium salt in mixed solvents to obtain solution A; (2), dissolving nanowire-shaped alpha-MnO2 in mixed solvents to obtain dispersion liquid B; (3), adding the solution A into the dispersion liquid B drop by drop, carrying out stirring reaction, separating reaction products after the reaction is completely carried out, and washing and drying the reaction products to obtain solid powder; (4), calcining and cooling the solid powder obtained at the step (3) to obtain the nanowire-shaped lithium-rich manganese-based anode materials. Compared with the prior art, the method has the advantages that processes for preparing the nanowire-shaped lithium-rich manganese-based anode materials are relatively simple, the lithium-rich manganese-based anode materials are in the shapes of nanowires and are excellent in electrochemical performance, and the like.
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Description

Technical field

[0001] The invention relates to the field of lithium ion battery cathode materials, in particular to a method for preparing nanowire-shaped lithium-rich manganese-based anode materials. Background technique

[0002] As a new type of chemical power source, lithium-ion battery is superior to traditional chemical power sources in terms of energy density, cycle life, safety performance, and environmental friendliness, making it one of the most promising energy storage devices so far. The Argonne National Laboratory in the United States first applied for a lithium-rich layered cathode material patent in 2001. Its theoretical specific capacity exceeds 300mAh / g, the actual usable capacity is greater than 200mAh / g, and the energy density is greater than 300Wh / kg. In terms of current development, the lithium-rich layered cathode material for lithium-ion batteries is 0.5Li 2 MnO 3 ·0.5LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 It has excellent cycling ability, good thermal stability, wide ...

Claims

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