Method for synthesizing positive material of lithium ion cell by means of organic acid complexation combustion
A lithium-ion battery, combustion synthesis technology, applied in the direction of battery electrodes, electrode manufacturing, chemical instruments and methods, etc., can solve the problem of uneven product particle size and element distribution, rare lithium-ion battery positive electrode materials, and hydrothermal reaction equipment Complicated and other issues, to achieve the effect of short synthesis reaction time, cheap manufacturing cost, and small particle size
Inactive Publication Date: 2004-10-06
武汉理工力强能源有限公司
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Problems solved by technology
Synthesis of LiMVO 4 Generally, solid-phase reaction and hydrothermal method are used, but solid-phase reaction requires a long time, high temperature, high energy consumption, uneven product particle size and element distribution, and the reaction equipment of hydrothermal method is more complicated, and the process is difficult to control
Synthesis of cathode materials for lithium-ion batteries by complex combustion of organic acids is still rare
Method used
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Embodiment 1
[0013] Embodiment 1: (1) according to LiOH, Co (CH 3 CH 2 COO) 2 , NH 4 VO 3 Batching according to the molar ratio of 1:1:1; (2) placing the batching material in a planetary mill, and ball milling for 3 to 10 hours; (3) dissolving the above slurry in deionized water, and adding a saturated solution of citric acid while stirring; (4) After ultrasonic treatment with a power of 400W and a frequency of 40Hz, heating in a water bath is carried out, and the temperature is controlled at 80°C to obtain xerogel; Raise the temperature to 450°C at a heating rate of 150°C / hour, and keep the temperature for 3 hours. The light brown inverse spinel positive electrode active material can be obtained. The analysis test shows (see attached figure) that the product is a single-phase LiCoVO 4 , high degree of crystallization, smooth particle surface and uniform particle size distribution. The element distribution of the product is relatively uniform, and the general chemical formula is Li ...
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Abstract
The method for synthesizing positive electrode material of lithium ion cell includes the following steps: preparing raw material according to the requirements for synthesizing product, ball-grinding for 3-10 hr, dissolving the above-mentioned material in deionized water, adding organic acid saturated solution whose number of carbon atoms is 2-8 while stirring to discharge lots of bubbles, using ultrasonic wave to make treatment, then heating in water bath, controlling temp. at 60-100 deg.C to obtain dried gel, ball-grinding dried gel and making combustion reaction, heat-insulating for 3 hr. at 450 deg.C in the furnace so as to obtain the invented positive electrode material.
Description
technical field [0001] The invention relates to a method for synthesizing positive electrode materials of lithium ion batteries through complex combustion of organic acids, belonging to the technical field of lithium ion battery materials. Background technique [0002] Lithium-ion batteries are the latest generation of secondary batteries developed in the 1990s. Currently the most studied cathode materials for lithium-ion batteries are three lithium-rich transition metal oxides LiCoO 2 , LiNiO 2 and LiMnO 4 , Their operating voltage is 4.1 ~ 4.5V. A new lithium-containing transition metal oxide cathode material LiMVO was recently discovered 4 , M is Ni, Co or Cu, has an inverse spinel structure, and has a high potential of 4.8V due to its cation mixing degree of up to 100% (relative to Li + / Li), thus being used as a new positive electrode active material for lithium-ion batteries. Synthesis of LiMVO 4 Generally, solid-phase reaction and hydrothermal method are used, ...
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IPC IPC(8): C01G31/00C01G53/04H01M4/485
CPCY02E60/12Y02E60/10
Inventor 陈文麦立强徐庆朱泉峣周静黄学辉郭万里彭俊锋
Owner 武汉理工力强能源有限公司