Preparation method of a lithium battery

A lithium battery and negative electrode material technology, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of low battery specific capacity and poor cycle performance, and achieve simple preparation process, low discharge platform and high production capacity Effect

Inactive Publication Date: 2019-01-22
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a preparation method of a lithium battery, which mainly solves the problems of low specific capacity and poor cycle performance of traditional lithium-ion batteries currently on the market

Method used

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  • Preparation method of a lithium battery

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Experimental program
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Effect test

Embodiment 1

[0013] Weigh 0.4gFe 2 o 3 / CoS-AC negative electrode material is mixed with 0.05g polyvinylidene fluoride, 2ml of N-methylpyrrolidone is added dropwise, stirred and mixed evenly to form a slurry. Coat the slurry evenly on the copper foil, dry it in vacuum at 120°C for 10min, punch it into a circular negative electrode sheet with a diameter of 14mm, dry it in vacuum at 85°C for 24h, and assemble it into a 2016-type battery in a glove box filled with argon. Lithium sheet is used as the counter electrode, Celgard2400 polypropylene diaphragm is used as the diaphragm, and the electrolyte is 1mol / l LiPF6 mixed with ethylene carbonate EC / dimethyl carbonate DMC / diethyl carbonate EMC solution (volume ratio is 1:1:1), Add the electrolyte dropwise until the separator, positive and negative electrodes are fully wetted,

[0014] where Fe 2 o 3 / CoS-AC anode material preparation method is as follows:

[0015] 1) Add 48 parts by weight of cobalt nitrate hexahydrate, 200 parts by weight ...

Embodiment 2

[0020] Exactly the same as Example 1, the difference is: add 54 parts by weight of cobalt nitrate hexahydrate and 10 parts by weight of Fe 3 o 4 / SiO 2 / NiO 2 composite material.

Embodiment 3

[0022] Exactly the same as Example 1, the difference is: add 42 parts by weight of cobalt nitrate hexahydrate and 18 parts by weight of Fe 3 o 4 / SiO 2 / NiO 2 composite material.

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Abstract

The invention discloses a preparation method of a lithium battery, which is characterized in that the preparation method comprises the following steps of: adding nanometer Fe2O3 / CoS-AC cathode material was mixed with PVDF and dripped with N-Methyl pyrrolidone, stirring and mixing uniformly to form slurry, A slurry is uniformly coat on that copper foil, vacuum drying, As that negative electrode plate with circular diameter is punch, vacuum drying at 85 DEG C for 24h, assembled in a glove box filled with argon, A lithium sheet is use as a counter electrode of that battery, Celgard2400 polypropylene diaphragm is use as that diaphragm. Compared with the traditional electrode material, the novel negative electrode material prepare by the invention can be used as an effective buffer medium to weaken the negative effect of volume change and improve the actual specific capacity and magnification performance of the negative electrode material when char and discharging due to the introduction offerromanganese cobalt oxide.

Description

technical field [0001] The invention relates to a preparation method of a lithium battery. Background technique [0002] With the rapid development and application of electric vehicles and electronic equipment, people's demand for high-capacity and long-life batteries is increasing day by day. Lithium-ion batteries are called It is the most promising chemical power source, but there are still problems in safety, performance and cost in its practical application and development. At present, commercial anode materials are mainly traditional carbon materials based on graphite, which can be divided into three categories according to their structural characteristics: graphite, easily graphitizable carbon (soft carbon) and difficult graphitizable carbon (hard carbon). However, the theoretical specific capacity of graphite-based anode materials is low (372mAh / g), and the rate performance is limited, which is far from meeting the needs of electric vehicles and next-generation mobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525H01M10/058H01M4/36
CPCH01M4/362H01M4/505H01M4/525H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 刘新卓士创张永伟
Owner XUZHOU NORMAL UNIVERSITY
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