阅读说明：本技术 一种环保性能好的石墨烯锂电池制备方法 (A kind of graphene lithium battery preparation method of good environmental protection ) 是由 王振国 于 2019-08-19 设计创作，主要内容包括：本发明公开了一种环保性能好的石墨烯锂电池制备方法,包括以下步骤：S1、配备石墨烯锂电池正极材料：石墨烯粉末和N-甲基吡咯烷酮按照一定质量比混合,超声分散后转移到反应釜中,通入氮气提升压力,然后缓慢泄压至常压,得混合料A1；将碳酸锂、碳酸镍、碳酸锰、乙酸铁、氧化钴按一定比例称取原料,并将原料放置进搅拌机搅拌,将混合均匀的原材料放入搅拌式球磨机进行机械活化,得混合料A2；将混合料A1和混合料A2按比例导入搅拌机内混合。本发明能对原料进行处理,从而便于将其生产组装成电池,能有效解决现有锂电池导电性能差的问题,提升了产品的质量,并且能快速降解和回收,提升了产品的环保性能。(The invention discloses a kind of graphene lithium battery preparation methods of good environmental protection, the following steps are included: S1, outfit graphene anode material of lithium battery: graphene powder and N-Methyl pyrrolidone are mixed according to certain mass ratio, it is transferred in reaction kettle after ultrasonic disperse, it is passed through nitrogen adherence pressure, then slow pressure release obtains mixture A1 to normal pressure；Lithium carbonate, nickelous carbonate, manganese carbonate, ferric acetate, cobalt oxide are weighed into raw material by a certain percentage, and raw material is placed into blender stirring, uniformly mixed raw material are put into stirring ball mill and carry out mechanical activation, obtain mixture A2；Mixture A1 and mixture A2 are imported in blender mix in proportion.The present invention can be handled raw material, consequently facilitating its production and assembly can effectively solve the problem of existing lithium battery electric conductivity difference at battery, improved the quality of product, and energy fast degradation and recycling, improved the environmental-protecting performance of product.)

1. a kind of graphene lithium battery preparation method of good environmental protection, feature exist, comprising the following steps:

S1, be equipped with graphene anode material of lithium battery: graphene powder and N-Methyl pyrrolidone are mixed according to certain mass ratio, It is transferred in reaction kettle after ultrasonic disperse, is passed through nitrogen adherence pressure, then slow pressure release to normal pressure, obtain mixture A1；By carbon Sour lithium, nickelous carbonate, manganese carbonate, ferric acetate, cobalt oxide weigh raw material by a certain percentage, and raw material is placed into blender stirring, Uniformly mixed raw material are put into stirring ball mill and carry out mechanical activation, obtain mixture A2；By mixture A1 and mixture A2 imports mixing in blender in proportion, and by obtaining positive electrode after heating-cooling-grinding-sintering-cooling；

S2, it is equipped with graphene lithium cell cathode material: pyrrole monomer being dissolved in solvent, graphene is added and divides at room temperature It dissipates, obtains mixed liquid B；Lithium titanate powder and surfactant are added in mixed liquid B, obtain mixed liquid B 1 after being dispersed；It will Mixed liquid B 1 is placed under cryogenic conditions to pour into blender and be stirred, and initiator is slowly dropped into mixed liquid B later, drips off Continue insulated and stirred reaction；After fully reacting, negative electrode material is obtained through filtering-washing-baking；

S3, aluminium foil is cut in required size, and be placed into it is spare in positive coating machine, by positive electrode obtained in S1 and Positive solution mixes at room temperature, and stirs evenly, and obtains solution C, and solution C is imported in coating machine barrel, passes through painting Cloth machine is coated solution C by defined surface density, obtains positive plate；

S4, copper foil is cut in required size, and be placed into it is spare in cathode coating machine, by positive electrode obtained in S2 and Positive solution mixes at room temperature, and stirs evenly, and obtains solution D, and solution D is imported in coating machine barrel, passes through coating Machine is coated solution D by defined surface density, obtains negative electrode tab；

S5, diaphragm paper is added among positive plate and negative electrode tab, and core is wound by sutomatic winding machine；

S6, core made of in step s 5 is fitted into degradable battery case and by the negative lug of the battery cathode sheet of core It is welded with degradable battery case, electrolyte is then injected into degradable battery case, placed 24 hours, to obtain graphene lithium Battery semi-finished product；

S7, by the positive pole ear and battery cap welding of the battery core in the graphene battery semi-finished product obtained in step s 6, so Battery cap is installed on the opening of battery case afterwards and is equipped with insulation spacer between battery cap and battery case, to obtain Graphene lithium battery.

2. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: the aluminium foil It is 1 μm with copper thickness.

3. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: the electrolysis Liquid is lithium hexafluoro phosphate, and the concentration of electrolyte is 1mol-1.3mol/L.

4. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: in the S1 Lithium carbonate, nickelous carbonate, manganese carbonate, ferric acetate, cobalt oxide molar ratio be Li:Ni:Co:Mn:Fe=1.5:0.222:0.312: 0.65:0.5。

5. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: in the S1 The mass ratio of graphene and N-Methyl pyrrolidone is 1:100-1:50.

6. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: the machinery Ratio of grinding media to material is 8:1, revolving speed 120r/min, activation time 2h when activation.

7. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: the anode It is 75-90g/ ㎡ that piece, which is coated with density, and the negative electrode tab coating density is 90-110g/ ㎡.

8. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: in the S6 The volume of the electrolyte in battery case is injected for 30% of the volume in remaining space after battery case loading battery core.

9. a kind of graphene lithium battery preparation method of good environmental protection according to claim 1, it is characterised in that: in the S1 Nitrogen gas concn be 99.99%.

Technical field

The present invention relates to the graphene lithium electricity of graphene lithium battery preparation technical field more particularly to a kind of good environmental protection Pool preparation method.

Background technique

Graphene has extraordinary heat-conductive characteristic.The thermal coefficient of pure flawless single-layer graphene is up to 5300W/mK is the highest carbon material of thermal coefficient so far, is higher than single-walled carbon nanotube (3500W/mK) and multi wall carbon is received Mitron (3000W/mK).When it is as carrier, thermal coefficient is also up to 600W/mK.In addition, the trajectory thermal conductivity of graphene can So that the lower limit of the trajectory thermal conductivity of the carbon nanotube of unit circumference and length moves down.The high thermal conductivity of graphene is conducive to discharge The heat that high current load generates in battery system.Lithium titanate battery is a kind of as lithium ion battery negative material-metatitanic acid Lithium can form the lithium ion secondary battery of 2.4V or 1.9V with positive electrodes such as LiMn2O4, ternary material or LiFePO4s.This Outside, it is also used as anode, the lithium secondary battery with lithium metal or lithium alloy cathode composition 1.5V.Due to the Gao An of lithium titanate Quan Xing, high stability, long-life and environmentally protective feature.

Lithium titanate battery causes its cycle performance good, charging performance is excellent due to the advantage above congenital material.But Its electric conductivity difference be we have in face of the problem of, graphene since it conducts electricity very well and hardness and excellent tenacity, The negative electrode tab that it is compounded to form battery with lithium titanate can effectively improve the active material ratio of battery material, it is often more important that Its cycle performance can be improved while improving high rate performance, help to prolong its service life, help to be promoted to environment Defencive function.

But how asking for lithium titanate battery its electric conductivity difference is made up using the conductive capability of graphene well Topic, is always the difficulties of those skilled in the art, for this purpose, we have proposed a kind of graphene lithium batteries of good environmental protection Preparation method solves the above problems.

Summary of the invention

The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of stone of the good environmental protection proposed Black alkene lithium battery preparation method.

To achieve the goals above, present invention employs following technical solutions:

A kind of graphene lithium battery preparation method of good environmental protection, comprising the following steps:

S1, be equipped with graphene anode material of lithium battery: graphene powder and N-Methyl pyrrolidone are mixed according to certain mass ratio, It is transferred in reaction kettle after ultrasonic disperse, is passed through nitrogen adherence pressure, then slow pressure release to normal pressure, obtain mixture A1；By carbon Sour lithium, nickelous carbonate, manganese carbonate, ferric acetate, cobalt oxide weigh raw material by a certain percentage, and raw material is placed into blender stirring, Uniformly mixed raw material are put into stirring ball mill and carry out mechanical activation, obtain mixture A2；By mixture A1 and mixture A2 imports mixing in blender in proportion, and by obtaining positive electrode after heating-cooling-grinding-sintering-cooling；

S2, it is equipped with graphene lithium cell cathode material: pyrrole monomer being dissolved in solvent, graphene is added and divides at room temperature It dissipates, obtains mixed liquid B；Lithium titanate powder and surfactant are added in mixed liquid B, obtain mixed liquid B 1 after being dispersed；It will Mixed liquid B 1 is placed under cryogenic conditions to pour into blender and be stirred, and initiator is slowly dropped into mixed liquid B later, drips off Continue insulated and stirred reaction；After fully reacting, negative electrode material is obtained through filtering-washing-baking；

S3, aluminium foil is cut in required size, and be placed into it is spare in positive coating machine, by positive electrode obtained in S1 and Positive solution mixes at room temperature, and stirs evenly, and obtains solution C, and solution C is imported in coating machine barrel, passes through painting Cloth machine is coated solution C by defined surface density, obtains positive plate；

S4, copper foil is cut in required size, and be placed into it is spare in cathode coating machine, by positive electrode obtained in S2 and Positive solution mixes at room temperature, and stirs evenly, and obtains solution D, and solution D is imported in coating machine barrel, passes through coating Machine is coated solution D by defined surface density, obtains negative electrode tab；

S5, diaphragm paper is added among positive plate and negative electrode tab, and core is wound by sutomatic winding machine；

S6, core made of in step s 5 is fitted into degradable battery case and by the negative lug of the battery cathode sheet of core It is welded with degradable battery case, electrolyte is then injected into degradable battery case, placed 24 hours, to obtain graphene lithium Battery semi-finished product；

S7, by the positive pole ear and battery cap welding of the battery core in the graphene battery semi-finished product obtained in step s 6, so Battery cap is installed on the opening of battery case afterwards and is equipped with insulation spacer between battery cap and battery case, to obtain Graphene lithium battery.

Preferably, the aluminium foil and copper thickness are 1 μm.

Preferably, the electrolyte is lithium hexafluoro phosphate, and the concentration of electrolyte is 1mol-1.3mol/L.

Preferably, lithium carbonate in the S1, nickelous carbonate, manganese carbonate, ferric acetate, cobalt oxide molar ratio be Li:Ni:Co: Mn:Fe=1.5:0.222:0.312:0.65:0.5.

Preferably, the mass ratio of graphene and N-Methyl pyrrolidone is 1:100-1:50 in the S1.

Preferably, ratio of grinding media to material is 8:1, revolving speed 120r/min, activation time 2h when the mechanical activation.

Preferably, the positive plate coating density is 75-90g/ ㎡, and the negative electrode tab coating density is 90-110g/ ㎡.

Preferably, the nitrogen gas concn in the S1 is 99.99%.

Compared with prior art, the beneficial effects of the present invention are:

1, by raw materials such as graphene powder, degradable battery case, lithium titanate powder and diaphragm papers, pass through the process in preparation method Raw material is handled, so as to make raw material reach the state of needs, and then is convenient for assembling, it can effective improving production efficiency And the quality of production, and the electric conductivity of product can be promoted；

2, by the use of the raw materials such as degradable battery case, graphene powder, effectively promote the environmental-protecting performance of this product, convenient for into Row degradation can be reduced the pollution to environment, and be recycled convenient for raw material, can effectively avoid the feelings for occurring leaking when in use Condition promotes the safety used；

To sum up, the present invention can be handled raw material, consequently facilitating its production and assembly can effectively solve existing lithium electricity at battery The problem of pond electric conductivity difference improves the quality of product, and energy fast degradation and recycling, improves the feature of environmental protection of product Energy.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is a kind of flow chart of the graphene lithium battery preparation method of good environmental protection proposed by the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.