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A method for improving the high-temperature solid-state reaction of lithium-ion battery cathode materials by mixing lithium in a wet method

A high-temperature solid-phase reaction, lithium-ion battery technology, used in battery electrodes, secondary batteries, circuits, etc., can solve the problems of dust flying of micro-powder lithium source and poor mixing uniformity, and achieve the problem of preventing dust flying, complete reaction, The effect of layered structure development is obvious

Active Publication Date: 2018-09-11
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of poor solid-phase mixing uniformity between the precursor of the positive electrode material of the lithium ion battery and the lithium source and the flying dust of the micropowdered lithium source, and to provide a method for improving the high-temperature solid-phase reaction of the positive electrode material of the lithium ion battery by mixing lithium in a wet method method

Method used

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  • A method for improving the high-temperature solid-state reaction of lithium-ion battery cathode materials by mixing lithium in a wet method
  • A method for improving the high-temperature solid-state reaction of lithium-ion battery cathode materials by mixing lithium in a wet method
  • A method for improving the high-temperature solid-state reaction of lithium-ion battery cathode materials by mixing lithium in a wet method

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specific Embodiment approach 1

[0027] Specific embodiment one: a kind of method of wet mixing lithium of this embodiment to improve the high-temperature solid-state reaction of lithium-ion battery cathode material is carried out according to the following steps:

[0028] 1. Preparation of lithium source solution: mix lithium source and complexing agent according to the molar ratio of 1:(0.01~1) to obtain a mixture; then add the mixture into water, stir for 10 minutes to 120 minutes to fully dissolve to obtain a high concentration of Lithium source solution; the high-concentration lithium source solution is 50% to 200% of the saturation concentration of lithium source in water;

[0029]2. Mixing of lithium source and precursor material: mix the high-concentration lithium source solution obtained in step 1 with the positive electrode precursor material of lithium ion battery according to the molar ratio of lithium source to precursor material (1-1.2): 1 and stir for 10 Minutes to 120 minutes to obtain a unifo...

specific Embodiment approach 2

[0032] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, the lithium source and complexing agent are mixed in a molar ratio of 1:1. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0033] Embodiment 3: This embodiment is different from Embodiment 1 in that in Step 2, the high-concentration lithium source solution obtained in Step 1 is mixed with the positive electrode precursor material of the lithium ion battery at a molar ratio of 1:1. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a method for improving the high-temperature solid-phase reaction of the anode material of a lithium ion battery by wet lithium mixing. The invention relates to a method for improving the high-temperature solid-phase reaction of the anode material of a lithium ion battery, belonging to the technical field of lithium ion battery materials and production technology thereof. The invention aims at solving the problems of low mixing uniformity between an anode material precursor of the lithium ion battery and a lithium-source solid phase and flying dust of a micro-powder lithium source. The method for improving the high-temperature solid-phase reaction of the anode material of the lithium ion battery by wet lithium mixing, disclosed by the invention, comprises the following steps: (I) preparation of a lithium-source solution; (II) mixing of the lithium source with a precursor material; (III) treatment of the mixture; and (IV) high-temperature sintering. The method for improving the high-temperature solid-phase reaction, disclosed by the invention, is used for preparing the anode material of the lithium ion battery.

Description

technical field [0001] The invention relates to a method for improving high-temperature solid-phase reaction of positive electrode materials of lithium-ion batteries, and belongs to the technical field of lithium-ion battery materials and manufacturing techniques thereof. Background technique [0002] With the rapid development of the global economy, people's demand for energy has also increased rapidly, and the reduction of traditional fossil energy (coal, oil, natural gas) and the deterioration of the earth's environment have become two major obstacles to human survival and development. The development of energy has become one of the hot research topics in various countries. As a device for mutual conversion of chemical energy and electrical energy, battery is an important medium for rational utilization of energy. Compared with traditional primary batteries and secondary batteries represented by lead-acid and nickel-cadmium, lithium-ion batteries have the advantages of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 杜春雨徐星尹鸽平左朋建程新群马玉林高云智
Owner HARBIN INST OF TECH