CN101635357A - Lithium-ion battery system - Google Patents
Lithium-ion battery system Download PDFInfo
- Publication number
- CN101635357A CN101635357A CN200810141697A CN200810141697A CN101635357A CN 101635357 A CN101635357 A CN 101635357A CN 200810141697 A CN200810141697 A CN 200810141697A CN 200810141697 A CN200810141697 A CN 200810141697A CN 101635357 A CN101635357 A CN 101635357A
- Authority
- CN
- China
- Prior art keywords
- lithium
- ion battery
- battery system
- limn2o4
- ternary material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 229910013716 LiNi Inorganic materials 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 13
- 239000010439 graphite Substances 0.000 claims description 13
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 10
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 10
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims 3
- 229910002102 lithium manganese oxide Inorganic materials 0.000 abstract 4
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 abstract 4
- 239000007774 positive electrode material Substances 0.000 abstract 4
- 229910016104 LiNi1 Inorganic materials 0.000 abstract 3
- 238000012360 testing method Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 229910015645 LiMn Inorganic materials 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention provides a lithium-ion battery system, which adopts lithium manganese oxide and a ternary material of LiNi1/5-2/5CO1/5-2/5Mn1/5-2/5O2 as a composite positive electrode material, and the weight ratio of the lithium manganese oxide to the ternary material of LiNi1/5-2/5CO1/5-2/5Mn1/5-2/5O2 in the composite positive electrode material is 50:50-80:20. The positive electrode material of the lithium-ion battery system adopts the lithium manganese oxide, thereby having lower cost and being environment-friendly; the ternary material of LiNi1/5-2/5CO1/5-2/5Mn1/5-2/5O2 makes up for the shortcomings on the aspects of capacity and cycle performance when the pure lithium manganese oxide is the positive electrode material; and the lithium-ion battery system has good capacity, cycle performance and anti-overcharge performance, in particular to good high-temperature storage performance.
Description
[technical field]
The present invention relates to a kind of lithium-ion battery system, especially a kind of lithium-ion battery system of low cost and high reliability.
[background technology]
Advantages such as lithium ion battery has that voltage height, energy density are big, good cycle, self discharge are little, memory-less effect and operating temperature range are wide have been widely used in mobile phone, notebook computer, electronic instrument, portable power tool, electric bicycle and weaponry etc.From early 1990s, be that the lithium ion battery of positive electrode has been realized commercialization with cobalt acid lithium, but owing to the cobalt resource shortage, on the high side, toxicly limit it and promote the use of.By contrast, though some shortcomings part such as LiMn2O4 exists discharge capacity relatively low, and structure is understable, LiMn2O4 aboundresources and cheapness, less to environmental hazard, these make LiMn2O4 (LiMn
2O
4) become the positive electrode that is hopeful to replace cobalt acid lithium most, have good DEVELOPMENT PROSPECT.The lithium-ion battery system that contains LiMn2O4 in the research and development positive electrode component becomes the important topic that LiMn2O4 is promoted research.
[summary of the invention]
Technical problem to be solved by this invention provides a kind of lithium-ion battery system of low cost and high reliability.
For solving the problems of the technologies described above, the invention provides a kind of lithium-ion battery system, adopt LiMn2O4 and ternary material LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2As composite positive pole, LiMn2O4 and ternary material LiNi in the composite positive pole
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Weight ratio be: 50: 50～80: 20.This anode material for lithium-ion batteries adopts LiMn2O4 and ternary material LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2, taken into account the requirement of cost and performance two aspects, have good practical prospect.
On this basis:
The parameter of the used LiMn2O4 of composite positive pole may be selected to be in the lithium-ion battery system of the present invention: D50:12um～16um, specific area: 0.22m
2/ g～0.45m
2/ g.
Ternary material LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Parameter may be selected to be: D50:4.5um～7.0um, specific area: 1.0m
2/ g～1.5m
2/ g.
Negative pole adopts native graphite and Delanium, and the weight ratio of native graphite and Delanium is: 20: 80～50: 50.
Adopt the electrolyte system of ethylene carbonate/methyl ethyl carbonate/diethyl carbonate, the volume ratio of ethylene carbonate, methyl ethyl carbonate, diethyl carbonate is: 1.5～2.5: 0.5～1.5: 3.5～4.5, and lithium concentration is in the electrolyte system: 1.0mol/L～1.3mol/L.
The invention has the beneficial effects as follows: adopted LiMn2O4 in this lithium-ion battery system positive electrode, cost is lower, environmental friendliness; Ternary material LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Remedied the deficiency of capacity and cycle performance aspect when being positive electrode with simple LiMn2O4; This lithium-ion battery system has good capacity, cycle performance and anti-overcharge performance, especially has the good high-temperature memory property.
[description of drawings]
Below by embodiment also in conjunction with the accompanying drawings, the present invention is described in further detail:
Fig. 1 is the cycle performance curve of a kind of embodiment gained of the present invention battery sample.
[embodiment]
Below each embodiment to adopt lithium-ion battery system of the present invention to make model be the sample battery of 503759P-860mAh.
Embodiment one
Anodal system: LiMn2O4 and ternary material (LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2) as composite positive pole, LiMn2O4 and ternary material LiNi in the composite positive pole
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Weight ratio be: 50: 50;
The physicochemical property of LiMn2O4: D50:12um in the composite positive pole; Specific area: 0.45m
2/ g;
The physicochemical property of ternary material: D50:7.0um in the composite positive pole; Specific area: 1.0m
2/ g;
The negative pole system: native graphite and Delanium, the weight ratio of native graphite and Delanium is: 20: 80;
Delanium parameter: D50:18um in the negative pole system; Specific area: 1.4m
2/ g;
Native graphite parameter: D50:16um in the negative pole system; Specific area: 1.8m
2/ g;
Electrolyte system: the electrolyte system that adopts ethylene carbonate/methyl ethyl carbonate/diethyl carbonate (EC/EMC/DEC), the volume ratio of ethylene carbonate, methyl ethyl carbonate, diethyl carbonate is: 1.5: 1.0: 4.5, lithium concentration was in the electrolyte system: 1.0mol/L.
Embodiment two
Anodal system: LiMn2O4 and ternary material (LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2) as composite positive pole, LiMn2O4 and ternary material LiNi in the composite positive pole
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Weight ratio be: 70: 30;
The physicochemical property of LiMn2O4: D50:15um in the composite positive pole; Specific area: 0.38m
2/ g;
The physicochemical property of ternary material: D50:6.0um in the composite positive pole; Specific area: 1.3m
2/ g;
The negative pole system: native graphite and Delanium, the weight ratio of native graphite and Delanium is: 40: 60;
Delanium parameter: D50:20um in the negative pole system; Specific area: 1.2m
2/ g;
Native graphite parameter: D50:18um in the negative pole system; Specific area: 1.5m
2/ g;
Electrolyte system: the electrolyte system that adopts ethylene carbonate/methyl ethyl carbonate/diethyl carbonate (EC/EMC/DEC), the volume ratio of ethylene carbonate, methyl ethyl carbonate, diethyl carbonate is: 2.0: 0.5: 3.9, lithium concentration was in the electrolyte system: 1.1mol/L.
Embodiment three
Anodal system: LiMn2O4 and ternary material (LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2) as composite positive pole, LiMn2O4 and ternary material LiNi in the composite positive pole
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Weight ratio be: 80: 20;
The physicochemical property of LiMn2O4: D50:16um in the composite positive pole; Specific area: 0.22m
2/ g;
The physicochemical property of ternary material: D50:4.5um in the composite positive pole; Specific area: 1.5m
2/ g;
The negative pole system: native graphite and Delanium, the weight ratio of native graphite and Delanium is: 50: 50;
Delanium parameter: D50:22um in the negative pole system; Specific area: 1.0m
2/ g;
Native graphite parameter: D50:20um in the negative pole system; Specific area: 1.2m
2/ g;
Electrolyte system: the electrolyte system that adopts ethylene carbonate/methyl ethyl carbonate/diethyl carbonate (EC/EMC/DEC), the volume ratio of ethylene carbonate, methyl ethyl carbonate, diethyl carbonate is: 2.5: 1.5: 3.5, lithium concentration was in the electrolyte system: 1.3mol/L.
Each embodiment sample battery is carried out following detection:
1. high-temperature storage performance detects
Take two kinds of detection schemes, concrete experiment condition and process:
Detection scheme one: battery (voltage is 4.2V) under full power state puts it in the vacuum drying oven, vacuumize and oven temperature is transferred to 85 ℃, under this temperature with battery storage 4 hours, take out battery then, treat battery cooling back (needing about 2 hours) measurement cell thickness, internal resistance, voltage and residual capacity, testing result sees Table one, and the result shows that each sample battery has the good high-temperature memory property.
Table one is stored the 4h testing result down for 85 ℃
Detection scheme two: battery (voltage is 4.2V) under full power state puts it in the vacuum drying oven, vacuumize and oven temperature is transferred to 60 ℃, under this temperature with battery storage 7 days, take out battery then, treat battery cooling back (needing about 2 hours) measurement cell thickness, internal resistance, voltage and residual capacity, testing result sees Table two, and the result shows that each sample battery has the good high-temperature memory property.
Table two is stored 7 days testing results down for 60 ℃
2.3C5V following over-charging detects
Testing conditions and process: at first, battery discharge to 2.75V, is charged to battery with the 3C constant current then, after cell voltage reaches 5V, become constant voltage charge, and it is constant to keep 5V voltage 2 hours by constant current charge.
Testing result shows: each sample battery no leakage, do not smolder, not on fire, do not explode, have good over-charging.
3. cycle performance detects
With blue electro-detection cabinet test battery cycle performance, concrete steps are as follows:
1) constant current (1C) is discharged to 2.75V;
2) constant current (1C) charges to 4.2V;
3) constant voltage (4.2V) charges to electric current and ends less than 10mA;
4) leave standstill 2min;
5) constant current (1C) is discharged to 2.75V;
And then from step 2) the new circulation of beginning, stop until 300 times.
The cycle performance testing result shows: 300 average conservation rates of circulation volume of each sample battery are 92.6%.
Fig. 1 is 300 circulation volume conservation rate curves of embodiment two sample batteries.
Claims (5)
1, a kind of lithium-ion battery system is characterized in that: adopt LiMn2O4 and ternary material LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2As composite positive pole, LiMn2O4 and ternary material LiNi in the described composite positive pole
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Weight ratio be: 50: 50～80: 20.
2, lithium-ion battery system according to claim 1 is characterized in that: the parameter of described LiMn2O4 is: D50:12um～16um, specific area: 0.22m
2/ g～0.45m
2/ g.
3, lithium-ion battery system according to claim 1 and 2 is characterized in that: described ternary material LiNi
1/5～2/5Co
1/5～2/5Mn
1/5～2/5O
2Parameter be: D50:4.5um～7.0um, specific area: 1.0m
2/ g～1.5m
2/ g.
4, lithium-ion battery system according to claim 3 is characterized in that: negative pole adopts native graphite and Delanium, and the weight ratio of native graphite and Delanium is: 20: 80～50: 50.
5, lithium-ion battery system according to claim 4, it is characterized in that: the electrolyte system that adopts ethylene carbonate/methyl ethyl carbonate/diethyl carbonate, the volume ratio of ethylene carbonate, methyl ethyl carbonate, diethyl carbonate is: 1.5～2.5: 0.5～1.5: 3.5～4.5, and lithium concentration is in the electrolyte system: 1.0mol/L～1.3mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810141697A CN101635357A (en) | 2008-07-23 | 2008-07-23 | Lithium-ion battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810141697A CN101635357A (en) | 2008-07-23 | 2008-07-23 | Lithium-ion battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101635357A true CN101635357A (en) | 2010-01-27 |
Family
ID=41594465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810141697A Pending CN101635357A (en) | 2008-07-23 | 2008-07-23 | Lithium-ion battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101635357A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257713A (en) * | 2015-06-19 | 2016-12-28 | Sk新技术株式会社 | Secondary battery cathode and the lithium secondary battery being produced from |
| CN108321384A (en) * | 2018-01-31 | 2018-07-24 | 北京国能电池科技股份有限公司 | Anode active material of lithium ion battery and positive electrode and lithium ion battery comprising it |
-
2008
- 2008-07-23 CN CN200810141697A patent/CN101635357A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257713A (en) * | 2015-06-19 | 2016-12-28 | Sk新技术株式会社 | Secondary battery cathode and the lithium secondary battery being produced from |
| CN108321384A (en) * | 2018-01-31 | 2018-07-24 | 北京国能电池科技股份有限公司 | Anode active material of lithium ion battery and positive electrode and lithium ion battery comprising it |
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