CN101685877A - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN101685877A CN101685877A CN200810216505A CN200810216505A CN101685877A CN 101685877 A CN101685877 A CN 101685877A CN 200810216505 A CN200810216505 A CN 200810216505A CN 200810216505 A CN200810216505 A CN 200810216505A CN 101685877 A CN101685877 A CN 101685877A
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- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- lithium
- electrolyte
- capacity
- 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.)
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 30
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 25
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003792 electrolyte Substances 0.000 claims abstract description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011029 spinel Substances 0.000 claims abstract description 16
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 16
- 159000000002 lithium salts Chemical group 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 229910003002 lithium salt Inorganic materials 0.000 claims description 12
- 239000012046 mixed solvent Substances 0.000 claims description 12
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 10
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 9
- 229910010707 LiFePO 4 Inorganic materials 0.000 claims description 8
- 229910015015 LiAsF 6 Inorganic materials 0.000 claims description 4
- 229910013063 LiBF 4 Inorganic materials 0.000 claims description 4
- 229910013188 LiBOB Inorganic materials 0.000 claims description 4
- 229910013684 LiClO 4 Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011255 nonaqueous electrolyte Substances 0.000 claims description 3
- 239000010405 anode material Substances 0.000 abstract description 2
- 239000010406 cathode material Substances 0.000 abstract 2
- 230000001351 cycling effect Effects 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 229910015645 LiMn Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
Images
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
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium ion battery, comprising anode material, cathode material and electrolyte; wherein the lithium ion battery takes spinel type lithium titanate as cathode material. Thelithium ion battery of the invention has higher security performance and excellent cycle performance, capacity in 8C rate discharge can reach more than 90% of capacity in 1C rate discharge; and capacity for cycling 1000 times in 2C discharge can maintain to be more than 88% of the initial capacity.
Description
Technical field
The present invention relates to the lithium ion battery field, particularly relate to the lithium ion battery of a kind of high safety performance and excellent cycle performance.
Background technology
No matter be that LiMn2O4 or LiFePO 4 have had the history of several years even ten several years as the lithium ion secondary power battery anode material, lithium ion secondary electrokinetic cell manufacturer as representative has Moli company (with LiMn2O4 as positive electrode) in the world, Valence and A123 (with the ferrous lithium of ferric phosphate as positive electrode).
Above-mentioned lithium ion secondary electrokinetic cell all is the hosts that adopt graphite to insert in charging process as lithium ion.Because graphite is inserting Li
+The LiC that the back forms
6Structure has with respect to Li
+Therefore/Li can form the battery than high open circuit voltage than electronegative potential (about about 0.5V) when relative with above-mentioned positive electrode.Yet problem derives from LiC equally
6The electronegative potential of structure promptly under negative pole graphite deficiency or positive electrode overcharge conditions, forms Li dendrite thereby Li will be deposited on the negative pole graphite surface with the form of metal, penetrates barrier film and causes internal short-circuit of battery and cause safety problem.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of lithium ion battery of novel high-safety long-life is provided.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses a kind of lithium ion battery, comprise positive electrode, negative material and electrolyte, described lithium ion battery is negative material with the spinel type lithium titanate.
Preferably, described spinel type lithium titanate is Li
4+xTi
5O
12, 0≤x≤3.
Preferred, described lithium ion battery with LiMn2O4 or LiFePO 4 as positive electrode.
Described electrolyte is a nonaqueous electrolyte.
Described electrolyte is preferably and is being selected from PC, EC, and DMC, EMC, DEC, GBL, MA, MF, DME, DEE in the mixed solvent of two or more composition among the MPC, adds the non-water-soluble electrolyte of separating that lithium salts forms.
Further preferred, described lithium salts is LiPF
6, LiBF
4, LiBOB, LiAsF
6, LiClO
4In at least a.The concentration of described lithium salts is 1.0～1.5mol/L.
Owing to adopted above technical scheme, the beneficial effect that the present invention is possessed is:
According to lithium ion battery of the present invention,, have with respect to Li owing to adopt spinel type lithium titanate as lithium ion battery negative material
+The current potential that/Li is higher, the problem that does not exist lithium metal to separate out in charge and discharge process can improve the security performance of battery greatly; Spinel type lithium titanate still is a kind of zero strain material simultaneously, thereby has excellent cycle performance.Lithium ion battery of the present invention during with the 8C multiplying power discharging capacity can reach more than 90% of 1C; 1000 capacity of circulation can remain on more than 88% of initial capacity when discharging with 2C.
Description of drawings
Fig. 1 assembles the first charge-discharge cycle graph of 18650 batteries for LiMn2O4 and lithium titanate.
Fig. 2 assembles the capability retention figure of 18650 batteries with 2C and 4C circulation 1000 times for LiMn2O4 and lithium titanate.
Fig. 3 assembles the high rate performance figure of 18650 batteries for LiMn2O4 and lithium titanate.
Fig. 4 assembles the capability retention figure of 18650 batteries with 1C and 4C circulation 1000 times for LiFePO 4 and lithium titanate.
Embodiment
But the invention provides a kind of fast charging and discharging, high safe lithium ion battery.These lithium ion battery characteristics are to have the high security of containing spinel type lithium titanate negative pole, positive pole and nonaqueous electrolyte; These lithium rechargeable battery characteristics also are the anodal LiMn2O4 that adopts, during LiFePO 4 during with the 8C multiplying power discharging capacity can reach more than 90% of 1C; This lithium rechargeable battery 1000 capacity that circulate when discharging with 2C can remain on more than 88% of initial capacity.
Spinel type lithium titanate has with respect to Li as lithium ion battery negative material
+The current potential that/Li is higher, the problem that does not exist lithium metal to separate out in charge and discharge process can improve the security performance of battery greatly; Spinel type lithium titanate still is a kind of zero strain material simultaneously, thereby has excellent cycle performance.The molecular formula of the spinel lithium titanate that the present invention adopts is Li
4+xTi
5O
12(0≤x≤3), its theoretical specific capacity is 175mAh/g, can bring into play in the practical application to the 166mAh/g.Provided by the invention promptly is a kind of with Li
4+xTi
5O
12(0≤x≤3) are negative material, spinel lithium manganate LiMn
2O
4Perhaps LiFePO
4Be the lithium rechargeable battery of positive electrode, this battery has excellent cycle performance and security performance.
In one of the present invention preferred embodiment, as positive electrode, spinel lithium titanate is during as negative material with LiMn2O4, and electrolyte adopts by PC, EC, DMC, EMC, DEC, GBL, MA, MF, DME, DEE, the mixed solvent of two or more composition among the MPC is added with LiPF
6, LiBF
4, LiBOB, LiAsF
6, LiClO
4In the non-water-soluble electrolyte of separating of lithium salts, when carrying out charge and discharge cycles with the 2C multiplying power, 1000 capacity of this battery circulation still remain on more than 87% of initial capacity.
The present invention another preferred embodiment in, as positive electrode, spinel type lithium titanate is during as negative material with LiFePO 4, electrolyte adopts by PC, EC, DMC, EMC, DEC, GBL, MA, MF, DME, DEE, the mixed solvent of two or more composition among the MPC is added with LiPF
6, LiBF
4, LiBOB, LiAsF
6, LiClO
4In the non-water-soluble electrolyte of separating of lithium salts, when carrying out charge and discharge cycles with the 2C multiplying power, 1000 capacity of this battery circulation still remain on more than 98% of initial capacity.
Among the present invention, electrolyte is preferably and adds the non-water-soluble electrolyte of separating that above-mentioned lithium salts forms in the mixed solvent of being made up of PC, DMC and EMC, wherein the mass ratio of PC in mixed solvent is 10%～50%, and the DMC mass ratio is 10%～30%, and the EMC mass ratio is 30%～70%.Add lithium salts concentration be preferably 1.0～1.5mol/L, lithium salts is preferably LiPF
6
Below by specific embodiment the present invention is done further detailed description.
Embodiment 1
As positive electrode, spinel lithium titanate is during as negative material with LiMn2O4, and its molecular formula is Li
4Ti
5O
12, electrolyte adopts by PC, DMC, and the mixed solvent that EMC forms is added with LiPF
6The non-water-soluble electrolyte of separating of lithium salts, in the mixed solvent, the PC mass ratio is 30%, and the DMC mass ratio is 20%, and the EMC mass ratio is 50%, LiPF
6Lithium salt is at 1.2mol/L.All the other are assembled into the 18650HP battery according to routine techniques, capacity 960mAh, and voltage platform is about 2.5V.When carrying out charge and discharge cycles with 2C and 4C multiplying power, voltage range is 1.5V～2.7V.1000 capacity of this battery circulation still remain on more than 88% of initial capacity.Circulate 300 capability retentions more than 75% at high temperature (60 ℃) with 1C.
As positive electrode, spinel lithium titanate is during as negative material with the olivine LiFePO 4, and its molecular formula is Li
4+xTi
5O
12(x=0.5), electrolyte adopts by PC, DMC, and the mixed solvent that EMC forms is added with LiPF
6The non-water-soluble electrolyte of separating of lithium salts, in the mixed solvent, the PC mass ratio is 35%, and the DMC mass ratio is 25%, and the EMC mass ratio is 40%, LiPF
6Lithium salt is at 1.1mol/L.All the other are assembled into the 18650HP battery according to routine techniques, capacity 660mAh, and voltage platform is about 1.9V.When carrying out charge and discharge cycles with the 2C multiplying power, voltage range is 0.5V～2.3V, and 1000 capacity of this battery circulation still remain on more than 99% of initial capacity.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. a lithium ion battery comprises positive electrode, negative material and electrolyte, it is characterized in that: described lithium ion battery is negative material with the spinel type lithium titanate.
2, a kind of lithium ion battery according to claim 1 is characterized in that: described spinel type lithium titanate is Li
4+xTi
5O
12, 0≤x≤3.
3, a kind of lithium ion battery according to claim 1 and 2 is characterized in that: described lithium ion battery with LiMn2O4 or LiFePO 4 as positive electrode.
4, a kind of lithium ion battery according to claim 3 is characterized in that: described electrolyte is a nonaqueous electrolyte.
5, a kind of lithium ion battery according to claim 4 is characterized in that: described electrolyte is being for to be selected from PC, EC, DMC, EMC, DEC, GBL, MA, MF, DME, DEE in the mixed solvent of two or more composition among the MPC, adds the non-water-soluble electrolyte of separating that lithium salts forms.
6, a kind of lithium ion battery according to claim 5, it is characterized in that: described electrolyte is in the mixed solvent of being made up of PC, DMC and EMC, add the non-water-soluble electrolyte of separating that lithium salts forms, wherein the mass ratio of PC in mixed solvent is 10%～50%, the DMC mass ratio is 10%～30%, and the EMC mass ratio is 30%～70%.
7, according to claim 5 or 6 described a kind of lithium ion batteries, it is characterized in that: described lithium salts is LiPF
6, LiBF
4, LiBOB, LiAsF
6, LiClO
4In at least a.
8, a kind of lithium ion battery according to claim 7 is characterized in that: the concentration of described lithium salts is 1.0～1.5mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810216505A CN101685877A (en) | 2008-09-24 | 2008-09-24 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810216505A CN101685877A (en) | 2008-09-24 | 2008-09-24 | Lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101685877A true CN101685877A (en) | 2010-03-31 |
Family
ID=42048915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810216505A Pending CN101685877A (en) | 2008-09-24 | 2008-09-24 | Lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101685877A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299369A (en) * | 2011-08-12 | 2011-12-28 | 珠海锂源新能源科技有限公司 | Lithium ion power battery and preparation method thereof |
| CN102299373A (en) * | 2011-08-12 | 2011-12-28 | 珠海锂源新能源科技有限公司 | Lithium ion power cell and its preparation method |
| CN102299375A (en) * | 2011-08-12 | 2011-12-28 | 珠海锂源新能源科技有限公司 | Lithium ion power battery and preparation method thereof |
| CN104409767A (en) * | 2014-11-25 | 2015-03-11 | 上海动力储能电池系统工程技术有限公司 | Low-temperature type lithium ion secondary battery |
| WO2018023527A1 (en) * | 2016-08-04 | 2018-02-08 | GM Global Technology Operations LLC | CATHODE COMPOSITION TO PREVENT OVER-DISCHARGE OF Li4Ti5O12 BASED LITHIUM ION BATTERY |
| CN110048160A (en) * | 2019-05-22 | 2019-07-23 | 湖北诺邦科技股份有限公司 | A kind of preparation method of ferrousphosphate lithium material and matching compatibility electrolyte and its battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030194605A1 (en) * | 2002-04-10 | 2003-10-16 | Fauteux Denis G. | Rechargeable high power electrochemical device |
| CN1700499A (en) * | 2005-05-23 | 2005-11-23 | 华南师范大学 | Li-ion battery cathode film forming function electrolyte and its preparing process |
| CN101162789A (en) * | 2007-11-16 | 2008-04-16 | 山东神工海特电子科技有限公司 | 1.5V charging capacitor battery |
-
2008
- 2008-09-24 CN CN200810216505A patent/CN101685877A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030194605A1 (en) * | 2002-04-10 | 2003-10-16 | Fauteux Denis G. | Rechargeable high power electrochemical device |
| CN1700499A (en) * | 2005-05-23 | 2005-11-23 | 华南师范大学 | Li-ion battery cathode film forming function electrolyte and its preparing process |
| CN101162789A (en) * | 2007-11-16 | 2008-04-16 | 山东神工海特电子科技有限公司 | 1.5V charging capacitor battery |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299369A (en) * | 2011-08-12 | 2011-12-28 | 珠海锂源新能源科技有限公司 | Lithium ion power battery and preparation method thereof |
| CN102299373A (en) * | 2011-08-12 | 2011-12-28 | 珠海锂源新能源科技有限公司 | Lithium ion power cell and its preparation method |
| CN102299375A (en) * | 2011-08-12 | 2011-12-28 | 珠海锂源新能源科技有限公司 | Lithium ion power battery and preparation method thereof |
| CN104409767A (en) * | 2014-11-25 | 2015-03-11 | 上海动力储能电池系统工程技术有限公司 | Low-temperature type lithium ion secondary battery |
| WO2018023527A1 (en) * | 2016-08-04 | 2018-02-08 | GM Global Technology Operations LLC | CATHODE COMPOSITION TO PREVENT OVER-DISCHARGE OF Li4Ti5O12 BASED LITHIUM ION BATTERY |
| CN110048160A (en) * | 2019-05-22 | 2019-07-23 | 湖北诺邦科技股份有限公司 | A kind of preparation method of ferrousphosphate lithium material and matching compatibility electrolyte and its battery |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100331 |