CN106450201A - High-compacted high-capacity lithium ion battery - Google Patents
High-compacted high-capacity lithium ion battery Download PDFInfo
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- CN106450201A CN106450201A CN201610933508.6A CN201610933508A CN106450201A CN 106450201 A CN106450201 A CN 106450201A CN 201610933508 A CN201610933508 A CN 201610933508A CN 106450201 A CN106450201 A CN 106450201A
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- Prior art keywords
- lithium ion
- weight
- capacity lithium
- pressure solid
- ion cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a high-compacted high-capacity lithium ion battery, comprising a positive electrode, a negative electrode, a diaphragm and electrolyte; the positive electrode is made from an active material, a binder and a conducting agent, and the negative electrode is made from composite graphite, a conducting agent and a binder, wherein the active material contains nickel-cobalt-aluminum LiNi0.8Co0.15Al0.05O2 (NCA) and lithium cobalt oxide LiCoO2 (LCO). The high-compacted high-capacity lithium ion battery has excellent compaction density and gram capacity.
Description
Technical field
The present invention relates to lithium ion battery, in particular it relates to high-pressure solid high-capacity lithium ion cell.
Background technology
Lithium ion battery has the advantages that high energy density, high discharge platform, is widely used in 3C electronic product, electronic
Instrument and energy-storage battery field.With the development of lithium battery technology, every profession and trade requires more and more higher, lithium to performance of lithium ion battery
Ion battery products increasingly tend to developing to directions such as high power capacity, light weight, high rate performance and good cycle, especially high energy
Metric density high-pressure solid direction.
High-energy-density, mainly compacted density and gram volume by improving material are realized.LiCoO2It is to make at present
With most commonly used positive electrode although it has larger compacted density, but its own gram volume compared with NCM and NCA simultaneously
Not high, generally improving its gram volume in the way of lifting charging/discharging voltage, but under high voltage material structure and unstable and
Can be along with substantial amounts of side reaction under high voltage；For NCM, its compacted density is relatively low, although leading to its gram volume high,
Volume energy density is not high.
Content of the invention
It is an object of the invention to provide a kind of high-pressure solid high-capacity lithium ion cell, this high-pressure solid high-capacity lithium ion cell
There is excellent compacted density and gram volume.
To achieve these goals, the invention provides a kind of high-pressure solid high-capacity lithium ion cell, including positive pole, bear
Pole, barrier film and electrolyte；Described positive pole contains active substance, binding agent and conductive agent, and described negative pole contains composite graphite, conduction
Agent and binding agent；Wherein, described active substance contains nickel cobalt aluminum LiNi0.8Co0.15Al0.05O2And lithium and cobalt oxides (NCA)
LiCoO2(LCO).
By technique scheme, the present invention is by using LiCoO2Compacted density is high but gram volume is low, NCA material capacity
(NCA compacted density is 3.5g/cm for the high but compacted density feature low compared with LCO3-3.55g/cm3, gram volume is 184mAh/g
(1C), LCO compacted density is 3.9g/cm3-4.1g/cm3, gram volume is 146mAh/g (1C)), by the collaborative effect of LCO and NCA
High-pressure solid high-capacity lithium ion cell should be made to have excellent compacted density and gram volume：At -20 DEG C, with 0.2C multiplying power electricity
Banish electricity, discharge capacity reaches the 80% of rated capacity；At 25 DEG C, 1C charging/1C discharge cycles 500 times, capability retention
More than 80%, security performance is good.Wherein, after NCA mixing LCO, the compacted density of the material of positive pressure pole may be up to 3.7g/
cm3；The 0.5C capacity of the battery providing with respect to the battery for pure NCA for the active substance, the present invention can improve more than 5%.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is detection example 1 intermediate ion battery A1, B1 1C rate discharge curves figure at -20 DEG C；
Fig. 2 is detection example 1 intermediate ion battery A1, B1 0.5C rate discharge curves figure at 25 DEG C；
Fig. 3 is the electric cyclic curve figure of detection example 1 intermediate ion battery A1, B1 1C charging/1C electric discharge at 25 DEG C.
Specific embodiment
Hereinafter the specific embodiment of the present invention is described in detail.It should be appreciated that it is described herein concrete
Embodiment is merely to illustrate and explains the present invention, is not limited to the present invention.
The invention provides a kind of high-pressure solid high-capacity lithium ion cell, including positive pole, negative pole, barrier film and electrolyte；Just
Active substance, binding agent and conductive agent are contained in pole, and negative pole contains composite graphite, conductive agent and binding agent；Wherein, active substance contains
There is nickel cobalt aluminum LiNi0.8Co0.15Al0.05O2(NCA) with lithium and cobalt oxides LiCoO2(LCO).
In the present invention, in positive pole, the consumption of each material can select in wide scope, but in order that high-pressure solid is high
Capacity lithium ion battery has more excellent compacted density and gram volume；Preferably, with the gross weight of the solidss in positive pole it is
Benchmark, the content of active substance is 94-99 weight %, and the content of binding agent is 0.5-3 weight %, and the content of conductive agent is 0.5-
3 weight %；On the basis of the gross weight of the solidss in negative pole, the content of composite graphite is 92-97 weight %, the containing of conductive agent
Measure as 1-3 weight %, the content of binding agent is 2-5 weight %.
In the present invention, in active substance, the content of NCA and LCO can select in wide scope, but in order that high
Compacting high-capacity lithium ion cell has more excellent compacted density and gram volume；Can select in wide scope, but be
The high-pressure solid high-capacity lithium ion cell is made to have more excellent compacted density and gram volume；Preferably, the weight of NCA and LCO
Ratio 1：9-9：1.
In the present invention, the concrete species of barrier film can select in wide scope, but in order that high-pressure solid high power capacity
Lithium ion battery has more excellent compacted density and gram volume；Preferably, barrier film be polypropylene or polyethylene ceramic membrane and
Membrane surface coating is by one layer of nanoscale aluminium sesquioxide material to have microcellular structure.
In the present invention, the concrete species of electrolyte can select in wide scope, but in order that high-pressure solid Gao Rong
Amount lithium ion battery has more excellent compacted density and gram volume；Preferably, electrolyte selects vinylene carbonate, fluoro carbon
Vinyl acetate or sulfurous esters compound.
In the present invention, the concrete species of binding agent can select in wide scope, but in order that high-pressure solid Gao Rong
Amount lithium ion battery has more excellent compacted density and gram volume；Preferably, in positive pole with negative pole, the binding agent of positive pole is
Kynoar (PVDF), the binding agent of negative pole is sodium carboxymethyl cellulose (CMC) and/or butadiene-styrene rubber (SBR).
In the present invention, the concrete species of conductive agent can select in wide scope, but in order that high-pressure solid Gao Rong
Amount lithium ion battery has more excellent compacted density and gram volume；Preferably, in positive pole and negative pole, conductive agent is carbon black,
One or more of electrically conductive graphite, acetylene black and CNT.
Hereinafter will be described the present invention by embodiment.
Embodiment 1
Rated capacity is the high-pressure solid high-capacity lithium ion cell A1 of 2.6Ah：By positive pole, negative pole, barrier film and electrolyte group
Become.Wherein, positive pole contains (calculating by the percentage by weight of solidss)：LiNi0.8Co0.15Al0.05O2(NCA) (71.3%), lithium
Cobalt/cobalt oxide LiCoO2(25%), 2% binding agent PVDF, 0.7% conductive agent SP, 1% conductive agent Ketjen black；Negative pole contains (to be pressed
The percentage by weight of solidss calculates)：95.2% Delanium, 1% conductive agent SP, 1.5% binding agent CMC, 2.3% binding agent
SBR；From polyethylene ceramic membrane；From the low-temperature electrolyte containing vinylene carbonate, fluorine ethylene carbonate.
Embodiment 2
Method according to embodiment 1 carries out high-pressure solid high-capacity lithium ion cell A2 is obtained, except that：NCA contains
Measure as 10 weight %, the content of LCO is 86.3 weight %.
Embodiment 3
Method according to embodiment 1 carries out high-pressure solid high-capacity lithium ion cell A3 is obtained, except that：NCA contains
Measure as 86.3 weight %, the content of LCO is 10 weight %.
Embodiment 4
Method according to embodiment 1 carries out high-pressure solid high-capacity lithium ion cell A4 is obtained, except that, positive pole contains
(calculating by the percentage by weight of solidss)：Active substance (99%), 0.5% binding agent PVDF, 0.5% conductive agent SP.
Embodiment 5
Method according to embodiment 1 carries out high-pressure solid high-capacity lithium ion cell A5 is obtained, except that：Positive pole contains
(calculating by the percentage by weight of solidss)：Active substance (94%), 3% binding agent PVDF, 1.5% conductive agent SP, 1.5% leads
Electric agent Ketjen black.
Embodiment 6
Method according to embodiment 1 carries out high-pressure solid high-capacity lithium ion cell A6 is obtained, except that：Positive pole contains
(calculating by the percentage by weight of solidss)：Negative pole contains (calculating by the percentage by weight of solidss)：92% Delanium,
3% conductive agent, 5% binding agent.
Embodiment 7
Method according to embodiment 1 carries out high-pressure solid high-capacity lithium ion cell A7 is obtained, except that：Positive pole contains
(calculating by the percentage by weight of solidss)：Negative pole contains (calculating by the percentage by weight of solidss)：97% Delanium,
1% conductive agent, 2% binding agent.
Comparative example 1
Rated capacity is the high-pressure solid high-capacity lithium ion cell B1 of 2.6Ah：By positive pole, negative pole, barrier film and electrolyte group
Become.Wherein, positive pole contains (calculating by the percentage by weight of solidss)：LiNi0.8Co0.15Al0.05O2(NCA) (96.3%), 2%
Binding agent PVDF, 0.7% conductive agent SP, 1% conductive agent Ketjen black；Negative pole contains (calculating by the percentage by weight of solidss)：
95.2% composite graphite (the Jiangxi Zi Chen company trade mark be 8C, be mainly made up of carbon), 1% conductive agent SP, 1.5% binding agent CMC,
2.3% binding agent SBR；From polyethylene ceramic membrane；From the low-temperature electrolytic containing vinylene carbonate, fluorine ethylene carbonate
Liquid.
Detection example 1
1) detect ion battery A1, B1 1C multiplying power discharging situation at -20 DEG C, concrete outcome is shown in Fig. 1.
2) detect ion battery A1, B1 0.5C multiplying power discharging situation at 25 DEG C, concrete outcome is shown in Fig. 2.
3) the charge and discharge cycles current conditions of 1C charging/1C electric discharge at 25 DEG C for detection ion battery A1, the B1, concrete knot
Fruit sees Fig. 3.
4) detect the compacted density of positive pole in ion battery A1, B1.
In ion battery A1, the compacted density of positive pole is 3.7g/cm3, in ion battery B1, the compacted density of positive pole is
3.5g/cm3；By Fig. 1-3, the performance of high-pressure solid high-capacity lithium ion cell A1 is as follows：At -20 DEG C, with 0.2C times
Rate current discharge, discharge capacity reaches the 80% of rated capacity；At 25 DEG C, 1C charging/1C discharge cycles 500 times, capacity is protected
Holdup is more than 80%.A1 can improve more than 5% with respect to B1, the 0.5C capacity of battery
In the same manner, according to above-mentioned method, high-pressure solid high-capacity lithium ion cell A2-A7 is detected, testing result and A1
Testing result be substantially consistent.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, multiple simple variant can be carried out to technical scheme, this
A little simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy no longer separately illustrates.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it equally should be considered as content disclosed in this invention.
Claims (8)
1. a kind of high-pressure solid high-capacity lithium ion cell is it is characterised in that include positive pole, negative pole, barrier film and electrolyte；Described just
Active substance, binding agent and conductive agent are contained in pole, and described negative pole contains composite graphite, conductive agent and binding agent；Wherein, described work
Property material contains nickel cobalt aluminum LiNi0.8Co0.15Al0.05O2(NCA) with lithium and cobalt oxides LiCoO2(LCO).
2. high-pressure solid high-capacity lithium ion cell according to claim 1, wherein, total with the solidss in described positive pole
On the basis of weight, the content of described active substance is 94-99 weight %, and the content of described binding agent is 0.5-3 weight %, described
The content of conductive agent is 0.5-3 weight %；On the basis of the gross weight of the solidss in described negative pole, the containing of described composite graphite
Measure as 92-97 weight %, the content of described conductive agent is 1-3 weight %, the content of described binding agent is 2-5 weight %.
3. high-pressure solid high-capacity lithium ion cell according to claim 2, wherein, the weight of described NCA and LCO is than for 1：
9-9：1.
4. the high-pressure solid high-capacity lithium ion cell according to any one in claim 1-3, wherein, described barrier film is poly-
Propylene or polyethylene ceramic membrane and the coating of described membrane surface are by one layer of nanoscale aluminium sesquioxide material to have micropore knot
Structure.
5. the high-pressure solid high-capacity lithium ion cell according to any one in claim 1-3, wherein, described electrolyte choosing
With vinylene carbonate, fluorinated ethylene carbonate or sulfurous esters compound.
6. the high-pressure solid high-capacity lithium ion cell according to any one in claim 1-3, wherein, described positive pole viscous
Knot agent is Kynoar, and the binding agent of described negative pole is sodium carboxymethyl cellulose and/or butadiene-styrene rubber.
7. the high-pressure solid high-capacity lithium ion cell according to any one in claim 1-3, wherein, described positive pole with
In negative pole, described conductive agent is one or more of carbon black, electrically conductive graphite, acetylene black and CNT.
8. the high-pressure solid high-capacity lithium ion cell according to any one in claim 1-3, wherein, described high-pressure solid is high
Capacity lithium ion battery meets following performance：At -20 DEG C, with 0.2C multiplying power current discharge, discharge capacity reaches rated capacity
80%；At 25 DEG C, 1C charging/1C discharge cycles 500 times, capability retention is more than 80%.
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| CN201610933508.6A CN106450201A (en) | 2016-11-01 | 2016-11-01 | High-compacted high-capacity lithium ion battery |
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| CN201610933508.6A CN106450201A (en) | 2016-11-01 | 2016-11-01 | High-compacted high-capacity lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019006990A1 (en) * | 2017-07-07 | 2019-01-10 | 福建猛狮新能源科技有限公司 | Lithium ion battery negative electrode and preparation method therefor and method for preparing lithium ion battery |
| WO2019073140A1 (en) | 2017-10-09 | 2019-04-18 | Hutchinson | Cathode composition for lithium-ion battery, preparation process thereof, cathode and lithium-ion battery incorporating same |
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| CN101071859A (en) * | 2007-06-07 | 2007-11-14 | 深圳市邦凯电子有限公司 | Lithium cell anode active substance, anode dressing and its preparing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019006990A1 (en) * | 2017-07-07 | 2019-01-10 | 福建猛狮新能源科技有限公司 | Lithium ion battery negative electrode and preparation method therefor and method for preparing lithium ion battery |
| WO2019073140A1 (en) | 2017-10-09 | 2019-04-18 | Hutchinson | Cathode composition for lithium-ion battery, preparation process thereof, cathode and lithium-ion battery incorporating same |
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