A kind of preparation method of negative electrode of lithium ion battery
A technology of lithium-ion battery and manufacturing method, which is applied in the field of making lithium-ion battery negative electrodes, can solve the problems of not being able to meet the needs of modernization, poor cycle stability, easy-to-break layered structure, etc., and achieve low cost, excellent performance, and excellent appearance Effect
Inactive Publication Date: 2017-11-21
TIANJIN UNIV
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Problems solved by technology
At present, the most commercially used anode material is graphite-based carbon material, whose theoretical reversible specific capacity is only 372mAh / g, which is far from meeting the needs of modernization, and the layered structure is easily damaged during the rapid charge and discharge process, and the cycle stability is poor. At the same time, there are also problems such as electrolyte compatibility and electrode safety.
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Embodiment 1
[0020] Take by weighing 0.3531g ammonium molybdate, 0.3654g thiourea and 35.1g sodium chloride, dissolve the mixture in 200ml of deionized water, stir and dissolve to form a solution with a magnetic stirrer with a stirring speed of 300r / min, and then Sonicate with a 400W sonicator for 15 minutes and mix well. Put the mixture in the refrigerator for 12 hours to freeze, and then place it in a freeze dryer at -50°C for vacuum drying until the mixture is dried. Grind the mixture and pass through a 150-mesh sieve, take 10g of powder and place it in the ark, put the ark in a tube furnace, pass through the Ar inert gas of 200ml / min to remove the air, then use the Ar inert gas of 200ml / min, and use 10 The heating rate of ℃ / min is raised to 750 ℃, and the temperature is kept for 2 hours for chemical vapor deposition. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain the calcined product A, which is collected, ground and wa...
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Abstract
The invention relates to a preparation method for a negative electrode of a lithium-ion battery. The method comprises the following steps: with one or a mixture of two of ammonium molybdate and sodium molybdate as a molybdenum source and thiourea as a sulfur source, dissolving the molybdenum source, the sulfur source and NaCl according to the molar ratio of molybdenum in the molybdenum source to sulfur in the sulfur source being 1 to (1.8-2.5) and the molar ratio of the molybdenum in the molybdenum source to the NaCl being 1 to (150-600); carrying out freezing and vacuum drying to obtain a mixture; grinding the prepared mixture into powder, and carrying out burning and chemical vapor deposition in a tube furnace constant temperature zone to obtain a product A; and washing the product A, and carrying out vacuum drying to obtain a molybdenum disulfide nanosheet. The molybdenum disulfide nanosheet is prepared from cheap and available raw materials, so that the method is low in cost, simple in reaction process and high in controllability; and the molybdenum disulfide nanosheet has certain specific capacity and cycle performance when applied to the negative electrode of the lithium-ion battery.
Description
technical field [0001] The invention relates to a method for making a negative pole of a lithium ion battery. Background technique [0002] With the continuous development of science and technology and industrial production in the 21st century, the world economy has entered a new era. However, with the consumption of resources and the pollution of the environment, there has been an ecological imbalance, With the grim reality of energy depletion, we urgently need to develop a clean and efficient energy source to replace non-renewable resources such as oil and coal mines. As a new chemical energy source, lithium-ion battery has been extensively researched by people due to its advantages of low cost, high working voltage, high specific energy, low self-discharge rate, high conversion efficiency, long cycle life, and environmental friendliness. And applied to various equipment in production and life. [0003] Although the commercial development of lithium-ion batteries has bec...
Claims
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IPC IPC(8): H01M4/1397H01M4/58H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/1397H01M4/5815H01M10/0525Y02E60/10
Inventor 何春年周静雯赵乃勤师春生刘恩佐李家俊
Owner TIANJIN UNIV