CN102931377A - Battery negative plate and lithium ion battery manufactured thereby - Google Patents
Battery negative plate and lithium ion battery manufactured thereby Download PDFInfo
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- CN102931377A CN102931377A CN2012104805320A CN201210480532A CN102931377A CN 102931377 A CN102931377 A CN 102931377A CN 2012104805320 A CN2012104805320 A CN 2012104805320A CN 201210480532 A CN201210480532 A CN 201210480532A CN 102931377 A CN102931377 A CN 102931377A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a battery negative plate. The negative plate comprises a negative current collector, wherein an anode material is coated on the upper surface of the negative current collector, and the anode material comprises at least one of natural graphite, artificial graphite, mesocarbon microbeads, and is polyhedron-shaped particles. In addition, the invention further discloses a lithium ion battery, which is manufactured by the battery negative plate. According to the battery negative plate and the lithium ion battery, provided by the invention, as the graphite particles adopted by the battery negative plate are polyhedron-shaped, any two adjacent graphite particles are mainly in surface contact with each other, the contact area is larger and the gas among the particles is small, so that the negative plate has small rebound after being roll-compacted, high conductivity and small internal resistance, so as to guarantee that the lithium ion battery manufactured by the battery negative plate has lower internal resistance, and accordingly, the capacity, the cycle performance and other electrical properties, as well as the stability of the lithium ion battery, are improved.
Description
Technical field
The present invention relates to the battery technology field, particularly relate to the lithium ion battery of a kind of battery cathode sheet and preparation thereof.
Background technology
The advantages such as lithium ion battery has high working voltage, high-energy-density, has extended cycle life, non-environmental-pollution, the secondary chemical sources of electric energy as electric energy and chemical energy being transformed mutually is regarded as one of popular candidate technologies of electric energy storing system.Since being born, its application constantly enlarges, and obtains rapidly development.At present, not only be used widely at portable communication apparatus and portable electric appts, and be widely used in the Large Electric equipment aspects such as electric tool, electric bicycle and electric automobile, therefore, more and more higher to the security performance requirement of lithium ion battery at present, how improving battery safety is the main direction of present each macrocell producer research.
For lithium ion battery, its negative plate is general to adopt traditional graphite to be prepared, and is specially at negative current collector coating one deck negative electrode active material, and described negative electrode active material is traditional graphite, the pattern of graphite granule is spherical substantially, referring to shown in Figure 1.Referring to shown in Figure 2, after under this shape battery cathode sheet being processed, a plurality of adjacent graphite granules are each other take a contact as main arbitrarily, the contact area less, thus cause the conductivity of battery cathode sheet lower, and owing to there is each other more space, be stayed more space so that roll to pole piece bounce-back at negative plate, so that the bounce-back of pole piece thickness is large, and then so that the interior resistive of prepared lithium ion battery is large, had a strong impact on every electrical property of lithium ion battery.
Therefore, at present in the urgent need to developing a kind of technology, it is lower and rolled the large problem of rear pole piece thickness bounce-back that it can solve the negative plate conductivity of lithium ion battery, guarantee that the prepared lithium ion battery of negative plate has lower internal resistance, every electrical properties such as the capacity of raising lithium ion battery, cycle performance.
Summary of the invention
In view of this, the lithium ion battery that the purpose of this invention is to provide a kind of battery cathode sheet and preparation thereof, the graphite granule that battery cathode sheet wherein adopts is the polyhedron graphite granule, thereby so that between the graphite granule of arbitrary neighborhood take the face contact as main, contact area is larger, inter-particle voids is little, thereby so that negative plate is high in the conductivity of and negative plate little by bounce-back after rolling, internal resistance is little, and then guarantee that the prepared lithium ion battery of negative plate has lower internal resistance, can significantly improve the capacity of lithium ion battery, every electrical property such as cycle performance, improve the stability of lithium ion battery, thereby have widely market application foreground, be of great practical significance.
For this reason, the invention provides a kind of battery cathode sheet, described negative plate includes a negative current collector, and described negative current collector upper surface is coated with negative material;
Described negative material is to comprise at least a in native graphite, Delanium and the carbonaceous mesophase spherules, and described negative material is polyhedron-shaped particle.
Wherein, described negative material is polyhedron-shaped natural graphite particles.
Wherein, described negative current collector is Copper Foil, and the thickness of described negative current collector is 8 microns or 10 microns.
In addition, the present invention also provides a kind of lithium ion battery, includes battery case, comprises positive plate, negative plate, battery diaphragm and electrolyte in the described battery case;
Described negative plate includes a negative current collector, and described negative current collector upper surface is coated with negative material;
Described negative material is to comprise at least a in native graphite, Delanium and the carbonaceous mesophase spherules, and described negative material is polyhedron-shaped particle.
Wherein, described negative material is polyhedron-shaped natural graphite particles.
Wherein, described negative current collector is Copper Foil, and the thickness of described negative current collector is 8 microns or 10 microns.
Wherein, described positive plate includes a plus plate current-collecting body, and described plus plate current-collecting body surface-coated has one deck positive electrode;
Described plus plate current-collecting body is aluminium foil, and described positive electrode includes cobalt acid lithium LiCoO
2, at least a in lithium nickel cobalt dioxide and the ternary material.
Wherein, described ternary material for example is ternary compound oxides nickle cobalt lithium manganate LiNi
1/3Co
1/3Mn
1/3O
2
By above technical scheme provided by the invention as seen, compared with prior art, the invention provides the lithium ion battery of a kind of battery cathode sheet and preparation thereof, the graphite granule that battery cathode sheet wherein adopts is the polyhedron graphite granule, thereby so that between the graphite granule of arbitrary neighborhood take the face contact as main, contact area is larger, inter-particle voids is little, thereby so that negative plate is high in the conductivity of and negative plate little by bounce-back after rolling, internal resistance is little, and then guarantee that the prepared lithium ion battery of negative plate has lower internal resistance, can significantly improve the capacity of lithium ion battery, every electrical property such as cycle performance, improve the stability of lithium ion battery, thereby have widely market application foreground, be of great practical significance.
Description of drawings
Fig. 1 is the scanning electron microscope sem figure of existing spherical graphite particle at microscopically;
Fig. 2 is existing spherical graphite particle contact schematic diagram each other;
Fig. 3 is that the polyhedron graphite granule of a kind of battery cathode sheet employing provided by the invention is at the scanning electron microscope sem figure of microscopically;
Fig. 4 is the polyhedron graphite granule contact schematic diagram each other that a kind of battery cathode sheet provided by the invention adopts;
Fig. 5 is that the prepared lithium ion battery specific embodiment of a kind of battery cathode sheet provided by the invention is when discharging at normal temperatures, compare the corresponding multiplying power discharging curve synoptic diagram of formed cell voltage and discharge capacity with the lithium ion battery of existing spherical graphite negative plate preparation;
Fig. 6 is that the prepared lithium ion battery of a kind of battery cathode sheet provided by the invention is compared the discharge capacity that has respectively and the discharge curve schematic diagram between the cycle-index with the lithium ion battery of existing spherical graphite negative plate preparation;
To be the prepared lithium ion battery of a kind of battery cathode sheet provided by the invention compare with the lithium ion battery of existing spherical graphite negative plate preparation Fig. 7, respectively after circulation repeatedly, and the internal resistance of cell that has and the change curve schematic diagram between the cycle-index.
Embodiment
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with drawings and embodiments.
The invention provides a kind of lithium ion battery, it includes battery case, comprises positive plate, negative plate, battery diaphragm and electrolyte in the described battery case.
In the present invention, described electrolyte can include polyesters solvent and lithium salts solute, perhaps can be other nonaqueous electrolytic solutions.For example, described polyesters solvent can be methyl ethyl carbonate (EMC), and described lithium salts solute can be lithium hexafluoro phosphate (LiPF
6).
In the present invention, described positive plate includes a plus plate current-collecting body, and described plus plate current-collecting body surface-coated has one deck positive electrode (being positive active material).
In the present invention, on the specific implementation, described plus plate current-collecting body can be aluminium foil, and the thickness of described plus plate current-collecting body can be 15 microns; Described positive electrode includes cobalt acid lithium LiCoO
2, at least a in lithium nickel cobalt dioxide and the ternary material, described ternary material for example can be ternary compound oxides nickle cobalt lithium manganate LiNi
1/3Co
1/3Mn
1/3O
2
In the present invention, described negative plate includes a negative current collector, and described negative current collector upper surface is coated with negative material (being negative electrode active material).
On the specific implementation, described negative current collector can be Copper Foil, and the thickness of described negative current collector can be 8 microns or 10 microns;
On the specific implementation, described negative material can be for comprising at least a in native graphite, Delanium and the carbonaceous mesophase spherules; Described negative material is preferably polyhedron-shaped particle, is specially polyhedron-shaped natural graphite particles.
In addition, need to prove that the material of the electrode terminal that the prepared lithium ion battery of the present invention adopts is by the alloy of nickel, aluminium, copper and above-mentioned metal or is coated with the material of above-mentioned metal.
Referring to Fig. 3, shown in Figure 4, in the present invention, the polyhedron graphite granule that described negative plate adopts is each other take the face contact as main, contact area is larger, inter-particle voids is little, thereby so that negative plate is high in the conductivity of and negative plate little by bounce-back after rolling, internal resistance is little, and then guarantee that the prepared lithium ion battery of negative plate has lower internal resistance, and then guarantee that the prepared lithium ion battery of negative plate has lower internal resistance, can significantly improve every electrical properties such as capacity, cycle performance of lithium ion battery.
Concrete preparation process and the battery performance of the lithium ion battery of a kind of battery cathode sheet provided by the invention and preparation thereof are described below by a specific embodiment.
Rectangular cell take the capacity of model as 043450 as 900mAh is as example.The positive electrode of this square battery (being positive active material) adopts cobalt acid lithium LiCoO
2, negative material (being negative electrode active material) adopts polyhedron graphite, and electrolyte uses molar concentration to be the lithium hexafluoro phosphate LiPF of 1mol/L
6Solution, the solvent that this solution adopts is ethylene carbonate (EC) or dimethyl carbonate (DMC).By general mixed sizing process, positive active material and negative electrode active material are coated on respectively on plus plate current-collecting body and the negative current collector, make obtaining positive plate and negative plate.
Then use the transformed polyethylene barrier film of one deck that positive plate and negative plate is spaced apart, and its positive plate and negative plate are reeled, then positive plate and the negative plate spooled are put in the battery case of aluminium matter, in drying box, injected electrolyte, again battery is sealed fully.Then carry out first charge-discharge (namely changing into reprocessing), and then battery is carried out every test of electrical property and security performance.
Prepare the battery of same model with same process using spherical graphite negative pole, carry out respectively the multinomial contrast tests such as internal resistance of cell comparison, pole piece bounce-back comparison, multiplying power test, cycle performance test.
1, the internal resistance of cell relatively.The present invention adopts the prepared lithium ion battery of polyhedron graphite cathode material to compare with the lithium ion battery of existing spherical graphite negative plate preparation, and the internal resistance of cell is as shown in table 1 below:
Table 1:
| Test parameter | The prepared lithium ion battery of polyhedron graphite cathode material provided by the invention | The lithium ion battery of spherical graphite negative plate preparation |
| The internal resistance of cell | 37.3 ohm | 35.2 ohm |
As shown in Table 1, the present invention adopts the prepared lithium ion battery of polyhedron graphite cathode material can significantly reduce the internal resistance of lithium ion battery, and this is the direct performance that its conductivity improves.
2, the pole piece bounce-back relatively.Adopt the prepared negative plate of polyhedron graphite cathode material and existing spherical graphite negative plate for the present invention, respectively it is rolled into after the thickness of requirement, then be placed on respectively in the baking oven, with 145 ℃ of oven dry 12 hours, measure respectively its pole piece thickness, compare with the thickness before the oven dry, the result is as shown in table 2 below:
Table 2:
| The pole piece kind | Pole piece thickness before the oven dry | Pole piece thickness after the oven dry | The pole piece bounce-back |
| The negative plate of spherical graphite particle preparation | 139/143/150 | 143/148/151 | 4~5 |
| The negative plate of polyhedron graphite granule preparation | 139/143/150 | 141/146/151 | 2 |
As shown in Table 2, the present invention adopts the negative plate of polyhedron graphite granule preparation, because the space between the adjacent graphite granule is little, thereby bounce-back stays less space to pole piece, thereby the pole piece bounce-back is little.And the negative plate of conventional graphite particle preparation, each other take a contact as main, particle voids is large, and density is on the low side, and the more space that bounce-back stays to pole piece.The minimizing of the negative plate thickness of the present invention's preparation also means and can under the same conditions this material be rolled to higher density, improves space availability ratio.
3, multiplying power test.Adopt the lithium ion battery of the prepared lithium ion battery of polyhedron graphite cathode material and the preparation of existing spherical graphite negative plate for the present invention, respectively take 0.5C(C as the actual battery capacity, present embodiment is 900mAh) the big or small extremely full electric 4.2V of current charges, then be discharged at normal temperatures voltage 3.0V with the electric current of 0.2C, 0.5C, 1C and 2C respectively, obtain the corresponding curve synoptic diagram of as shown in Figure 5 cell voltage and discharge capacity.
As shown in Figure 5, the present invention adopts the prepared lithium ion battery of polyhedron graphite cathode material to compare with the lithium ion battery of existing spherical graphite negative plate preparation, the polyhedron material is better than traditional spherical graphite negative pole aspect high rate performance, this also is the performance that this material conductivity improves.
4, circulation and internal resistance.
Adopt the lithium ion battery of the prepared lithium ion battery of polyhedron graphite cathode material and the preparation of existing spherical graphite negative plate for the present invention, respectively with 1C(actual battery capacity 900mAh for example) electric current carry out charge and discharge cycles 500 times, the result is as shown in Figure 6.
As shown in Figure 6, aspect cycle performance, polyhedron graphite still is better than the traditional spheroidal graphite cathode, and the main distinction is that with the rising of cycle-index, the internal resistance recruitment of battery has obvious difference, and is as shown in table 3 below:
In the table 3, IR is the internal resistance of cell, and △ IR is the rear internal resistance recruitment of circulation, and △ IR% is the percent value of internal resistance recruitment and initial internal resistance.
In addition, for the lithium ion battery that the present invention adopts the prepared lithium ion battery of polyhedron graphite cathode material and existing spherical graphite negative plate to prepare, its internal resistance change curve as shown in Figure 7.
As shown in Figure 7, the present invention is less than the prepared negative plate of spherical graphite particle by the internal resistance recruitment of the negative plate of polyhedron graphite granule preparation, and therefore, the present invention can be had superiority by the cycle performance of the negative plate of polyhedron graphite granule preparation.
Therefore, by technique scheme and specific embodiment as can be known, lithium ion battery for a kind of battery cathode sheet provided by the invention and preparation thereof, the density that rolls that it not only can promote pole piece conductivity, reduce the pole piece bounce-back and improve on a small quantity negative pole, and can reduce the internal resistance of battery, significantly improve every electrical property of battery.
In sum, compared with prior art, the invention provides the lithium ion battery of a kind of battery cathode sheet and preparation thereof, the graphite granule that battery cathode sheet wherein adopts is the polyhedron graphite granule, thereby so that between the graphite granule of arbitrary neighborhood take the face contact as main, contact area is larger, inter-particle voids is little, thereby so that negative plate is high in the conductivity of and negative plate little by bounce-back after rolling, internal resistance is little, and then guarantee that the prepared lithium ion battery of negative plate has lower internal resistance, can significantly improve the capacity of lithium ion battery, every electrical property such as cycle performance, improve the stability of lithium ion battery, thereby have widely market application foreground, be of great practical significance.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a battery cathode sheet is characterized in that, described negative plate includes a negative current collector, and described negative current collector upper surface is coated with negative material;
Described negative material is to comprise at least a in native graphite, Delanium and the carbonaceous mesophase spherules, and described negative material is polyhedron-shaped particle.
2. battery cathode sheet as claimed in claim 1 is characterized in that, described negative material is polyhedron-shaped natural graphite particles.
3. battery cathode sheet as claimed in claim 1 or 2 is characterized in that, described negative current collector is Copper Foil, and the thickness of described negative current collector is 8 microns or 10 microns.
4. a lithium ion battery is characterized in that, includes battery case, comprises positive plate, negative plate, battery diaphragm and electrolyte in the described battery case;
Described negative plate includes a negative current collector, and described negative current collector upper surface is coated with negative material;
Described negative material is to comprise at least a in native graphite, Delanium and the carbonaceous mesophase spherules, and described negative material is polyhedron-shaped particle.
5. lithium ion battery as claimed in claim 4 is characterized in that, described negative material is polyhedron-shaped natural graphite particles.
6. such as claim 4 or 5 described lithium ion batteries, it is characterized in that described negative current collector is Copper Foil, the thickness of described negative current collector is 8 microns or 10 microns.
7. lithium ion battery as claimed in claim 4 is characterized in that, described positive plate includes a plus plate current-collecting body, and described plus plate current-collecting body surface-coated has one deck positive electrode;
Described plus plate current-collecting body is aluminium foil, and described positive electrode includes cobalt acid lithium LiCoO
2, at least a in lithium nickel cobalt dioxide and the ternary material.
8. lithium ion battery as claimed in claim 7 is characterized in that, described ternary material for example is ternary compound oxides nickle cobalt lithium manganate LiNi
1/3Co
1/3Mn
1/3O
2
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050214645A1 (en) * | 2002-11-29 | 2005-09-29 | Seimi Chemical Co., Ltd. | Process for producing positive electrode active material for lithium secondary battery |
| CN1970439A (en) * | 2005-11-25 | 2007-05-30 | 中国科学院金属研究所 | Preparation method of thermolysis carbon ball |
| CN101262078A (en) * | 2008-04-14 | 2008-09-10 | 天津巴莫科技股份有限公司 | Quickly chargeable lithium ion battery and its making method |
| CN101485017A (en) * | 2006-06-02 | 2009-07-15 | 日本碳素株式会社 | Negative electrode active material for lithium ion rechargeable battery, and negative electrode |
| CN102623693A (en) * | 2012-04-13 | 2012-08-01 | 山东大学 | High specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for negative electrode of lithium ion battery |
| CN102694167A (en) * | 2011-08-30 | 2012-09-26 | 中国科学院宁波材料技术与工程研究所 | Modified lithium manganate positive pole material and preparation method thereof |
-
2012
- 2012-11-23 CN CN2012104805320A patent/CN102931377A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050214645A1 (en) * | 2002-11-29 | 2005-09-29 | Seimi Chemical Co., Ltd. | Process for producing positive electrode active material for lithium secondary battery |
| CN1970439A (en) * | 2005-11-25 | 2007-05-30 | 中国科学院金属研究所 | Preparation method of thermolysis carbon ball |
| CN101485017A (en) * | 2006-06-02 | 2009-07-15 | 日本碳素株式会社 | Negative electrode active material for lithium ion rechargeable battery, and negative electrode |
| CN101262078A (en) * | 2008-04-14 | 2008-09-10 | 天津巴莫科技股份有限公司 | Quickly chargeable lithium ion battery and its making method |
| CN102694167A (en) * | 2011-08-30 | 2012-09-26 | 中国科学院宁波材料技术与工程研究所 | Modified lithium manganate positive pole material and preparation method thereof |
| CN102623693A (en) * | 2012-04-13 | 2012-08-01 | 山东大学 | High specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for negative electrode of lithium ion battery |
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Application publication date: 20130213 |