CA2251068A1 - Secondary lithium ion cell - Google Patents
Secondary lithium ion cell Download PDFInfo
- Publication number
- CA2251068A1 CA2251068A1 CA002251068A CA2251068A CA2251068A1 CA 2251068 A1 CA2251068 A1 CA 2251068A1 CA 002251068 A CA002251068 A CA 002251068A CA 2251068 A CA2251068 A CA 2251068A CA 2251068 A1 CA2251068 A1 CA 2251068A1
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- CA
- Canada
- Prior art keywords
- lithium ion
- ion cell
- vol
- secondary lithium
- lithium
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- 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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- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/72—Grids
- H01M4/74—Meshes or woven material; Expanded metal
- H01M4/745—Expanded metal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
- H01M6/162—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
- H01M6/164—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte by the solvent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
- H01M6/162—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
- H01M6/166—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte by the solute
-
- 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)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
A secondary lithium ion cell with good current loadability and a low capacity loss after high temperature storage has an electrolyte composed of a solution of a lithium salt in an organic solvent mixture containing 20 to 40 vol.% ethylene carbonate, 15 to 30 vol.% diethyl carbonate, and 35 to 55 vol.% propylene carbonate.
Description
CA 022~1068 1998-10-22 065.6719 PATENT
SECONDARY LITHIUM ION CELL
BACKGROUND OF THE INVENTION
Field of the Invention The invention pertains to a secondary lithium ion cell with good current loadability and a low capacity loss after storage at high temperature.
Description of the Related Art U.S. Patent No. 5,472,809 teaches a lithium ion cell in which a ternary organic solvent mixture consisting of 5-40 vol.% propylene carbonate (PC), 10-20 vol.% ethylene carbonate (EC), and 50-85 vol.% dimethyl carbonate (DMC) with a conducting salt containing lithium ions dissolved in it is used as the electrolyte. As conducting salts the following are proposed: lithium hexafluoroarsenate (LiAsF6), lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium perchlorate (LiCI04), lithium trifluoromethane sulfate (LiCF3SO3), lithium bis(trifluoromethanesulfone)imide (LiN(CF3SO2)2), or lithium bis(trifluoromethanesulfone)methide (LiC(CF3SO2)3), or mixtures of these. The above noted electrolytes are said to assure above all the dischargeability of lithium ion cells at low temperatures.
European Patent No. EP-A 643433 teaches that an electrolyte c~-nt:~ining LiPF6 can be produced for lithium ion cells by reacting ammonium hexafluorophosphate (NH4PF6) in a mixture consisting of 20 vol.% PC, 30 vol.% EC, and 50vol.% diethyl carbonate (DEC) with lithium hydride.European Patent No. EP-A 312236 discloses as the electrolyte for nonaqueous cells a solvent mixture consisting of EC, PC, and a polyethylene glycol dialkyl ether. As a reference example, a solvent mixture consisting of 40 mol.% PC, 40 mol.% EC, and 20 mol.% DEC is reported.
With consideration of the useful capacity from cells which contain the above-mentioned electrolyte or their loadability, however, the need exists for additional improvement. The loadability in this case refers to the discharging of the cells with high current intensities or current densities.
SUMMARY OF THE INVENTION
The invention is directed to a secondary lithium ion cell having good high-temperature storage stability and improved loadability. Lithium ion cells with an electrolyte according to the invention have a lower capacity loss after storage at 60~C over a time span of 7 days. In this case, the useful capacity from the cells produced according to the invention, as well as after storage in the charged as well as after storage in the uncharged state, is higher than that of reference cells. In addition, the cells according to the invention have higher loadability, which is manifested in the higher useful capacity at greater discharge current intensities. It was also found that the lithium ion cells according to the invention, FP 585-US - 1 - 065.6719 PATENT
CA 022~l068 l998-l0-22 despite discharging down to 0 V, can be charged and discharged more than 100 times before the useful capacity drops to a value of c 70% of the initial capacity. The cells according to the invention therefore have a very good deep discharge strength.
The present invention is a secondary lithium ion cell comprising a carbon-containing anode material, a lithium-cont~;n;ng cathode material, and a nonaqueous electrolyte comprising a solution of a lithium salt in an organic solvent mixture which contains 20 to 40 vol.% ethylene carbonate, 15 to 30 vol.% diethyl cArhon~te, and 35 to 55 vol.% propylene carbonate.
In certain embodiments, o The solvent mixture comprises 25 to 35 vol.% ethylene carbonate, 20 to 25 vol.% diethyl carbonate, and 40 to 50 vol.% propylene carbonate, o The electrolyte cont~;n~ 0.9 - 2.0 mole/l LiCl04, LiPF6, LiSo3CF3, LiBF4, LiN(CF3Sol)3, or LiC(CF3So2)3, and preferably 0.9 - 1.5 mole/l LiCl04 or LiPF6, o The carbon-cont~;n;ng anode material is provided with a metal conduc-tor matrix, wherein the metallic conductor matrix is a stainless steel band, a nickel stretched metal, or a nickel foam, and/or o The lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
BRIEF DESCRIPTION OF THE DRAWINGS
Other aspects, features, and advantages of the present invention will become more fully apparent from the following detailed description, the appended claims, and the accompanying drawings in which:
Fig. 1 compares the useful capacities from the cells according to Example 1(-), Example 2(x), and Reference Example 1(~) as a function of the discharge current intensity;
Fig. 2 shows the capacities in cells according to Example 1 charged (-) and discharged as a function of the cycle number (z), where the broken curve (~) represents the discharged capacity up to a final discharge voltage of 1.8 V and the dotted curve (x) shows the additionally discharged capacity for a discharge down to 0 V;
Fig. 3 shows the charged and discharged capacities for cells according to Example 2;
Fig. 4 shows the discharge capacity of the cells according to Example 3 (x) and Example 4 (-) as a function of the cycle number (z); and Fig. 5 shows an exemplary button cell for the present invention.
DETAILED DESCRIPTION
Example 1 A graphite anode pasted in nickel foam (diameter 4.20 mm, height 0.71 mm), a 200-~m thick polypropylene separator, and a lithium oxide-cont~;n;ng cathode are installed in a button cell with an outer diameter of 6.8 mm and a height of 2.1 mm. 18 ~l of a 1-molar solution of LiCl04 in an organic CA 022~1068 1998-10-22 solvent mixture consisting of 30 vol.% EC, 20 vol.% DEC, and 50 vol.% PC is added as the electrolyte.
The cells are closed and tested for their capacity before and after high-temperature storage, their loadability, and their deep dischargeability.
Example 2 Button cells are produced according to Example 1 with the difference that LiPF6 is used as the conducting salt.
Reference Example 1 Button cells produced as in Example 1 contain as the electrolyte a 1-molar solution of LiCI04 in a solvent mixture consisting of 25 vol.% EC, 10 vol.% DEC, and 65 vol.% ethyl methyl carbonate (EMC).
Example 3 lS A round of lithium foil 0.31 mm thick and a graphite anode pasted in nickel foam are inserted in a button cell housing with a diameter of 6.8 mm and a height of 2.1 mm. A 200-11m thick polypropylene separator is used as the separator, and a lithium spinel-containing electrode is used as the cathode. The electrolyte consists of a 1-molar solution of LiPF6 in an organic solvent mixture consisting of 30 vol.%
EC, 20 vol.% DEC, and 50 vol.% PC.
Example 4 Button cells are produced as in Example 3 except that a 0.25-mm thick lithium foil is used.
Reference Example 2 Button cells are produced as in Example 4, but a 1-molar solution of LiPF6 in 15 vol.% EC, 50 vol.% DMC, and 35 vol.% PC is used as the electrolyte.
As Fig. 1 shows, the cells produced according to the invention have a higher useful capacity even at greater discharge current intensities. Figs. 2 and 3 show the surprising deep discharge strength of the cells according to the invention. In Table 1, the useful capacities according to the invention and the reference examples are contained, where n.d. = not determined. A comparison of the relative capacity loss after a high-temperature storage shows that the cells according to the invention suffer lower irreversible capacity loss.
FP 585-US -3- 065.6719 PATENT
CA 022~1068 1998-10-22 Table 1. Discharge capacity C in [mAh]
Trialwithout HT after HT direct HT relative storage storagestorage C
No. 1st 2nd 1st 2nd 1st 2nd loss [%]
cycle cycle cycle cycle cycle cycle Example 11.142 1.136 0.906 0.898 0.891 0.881 20.95 S Example 21.161 1.154 0.992 0.997 1.032 1.008 13.60 Ref. ex. 1 1.194 1.192 0.470 0.171 0.470 0.102 85.65 Example 31.247 1.202 0.757 0.822 0.891 0.916 31.61 Example 41.112 1.122 0.636 0.732 0.663 0.732 39.76 Ref. ex. 2 1.410 1.402 0.364 0.493 n.d. n.d. 64.84 It will be further understood that various changes in the details, materials, and arrangements of the parts which have been described and illustrated in order to explain the nature of this invention may be made by those skilled in the art without departing from the principle and scope of the invention as expressed in the following claims.
FP 585-US -4- 065.6719 PATEI~IT
SECONDARY LITHIUM ION CELL
BACKGROUND OF THE INVENTION
Field of the Invention The invention pertains to a secondary lithium ion cell with good current loadability and a low capacity loss after storage at high temperature.
Description of the Related Art U.S. Patent No. 5,472,809 teaches a lithium ion cell in which a ternary organic solvent mixture consisting of 5-40 vol.% propylene carbonate (PC), 10-20 vol.% ethylene carbonate (EC), and 50-85 vol.% dimethyl carbonate (DMC) with a conducting salt containing lithium ions dissolved in it is used as the electrolyte. As conducting salts the following are proposed: lithium hexafluoroarsenate (LiAsF6), lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium perchlorate (LiCI04), lithium trifluoromethane sulfate (LiCF3SO3), lithium bis(trifluoromethanesulfone)imide (LiN(CF3SO2)2), or lithium bis(trifluoromethanesulfone)methide (LiC(CF3SO2)3), or mixtures of these. The above noted electrolytes are said to assure above all the dischargeability of lithium ion cells at low temperatures.
European Patent No. EP-A 643433 teaches that an electrolyte c~-nt:~ining LiPF6 can be produced for lithium ion cells by reacting ammonium hexafluorophosphate (NH4PF6) in a mixture consisting of 20 vol.% PC, 30 vol.% EC, and 50vol.% diethyl carbonate (DEC) with lithium hydride.European Patent No. EP-A 312236 discloses as the electrolyte for nonaqueous cells a solvent mixture consisting of EC, PC, and a polyethylene glycol dialkyl ether. As a reference example, a solvent mixture consisting of 40 mol.% PC, 40 mol.% EC, and 20 mol.% DEC is reported.
With consideration of the useful capacity from cells which contain the above-mentioned electrolyte or their loadability, however, the need exists for additional improvement. The loadability in this case refers to the discharging of the cells with high current intensities or current densities.
SUMMARY OF THE INVENTION
The invention is directed to a secondary lithium ion cell having good high-temperature storage stability and improved loadability. Lithium ion cells with an electrolyte according to the invention have a lower capacity loss after storage at 60~C over a time span of 7 days. In this case, the useful capacity from the cells produced according to the invention, as well as after storage in the charged as well as after storage in the uncharged state, is higher than that of reference cells. In addition, the cells according to the invention have higher loadability, which is manifested in the higher useful capacity at greater discharge current intensities. It was also found that the lithium ion cells according to the invention, FP 585-US - 1 - 065.6719 PATENT
CA 022~l068 l998-l0-22 despite discharging down to 0 V, can be charged and discharged more than 100 times before the useful capacity drops to a value of c 70% of the initial capacity. The cells according to the invention therefore have a very good deep discharge strength.
The present invention is a secondary lithium ion cell comprising a carbon-containing anode material, a lithium-cont~;n;ng cathode material, and a nonaqueous electrolyte comprising a solution of a lithium salt in an organic solvent mixture which contains 20 to 40 vol.% ethylene carbonate, 15 to 30 vol.% diethyl cArhon~te, and 35 to 55 vol.% propylene carbonate.
In certain embodiments, o The solvent mixture comprises 25 to 35 vol.% ethylene carbonate, 20 to 25 vol.% diethyl carbonate, and 40 to 50 vol.% propylene carbonate, o The electrolyte cont~;n~ 0.9 - 2.0 mole/l LiCl04, LiPF6, LiSo3CF3, LiBF4, LiN(CF3Sol)3, or LiC(CF3So2)3, and preferably 0.9 - 1.5 mole/l LiCl04 or LiPF6, o The carbon-cont~;n;ng anode material is provided with a metal conduc-tor matrix, wherein the metallic conductor matrix is a stainless steel band, a nickel stretched metal, or a nickel foam, and/or o The lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
BRIEF DESCRIPTION OF THE DRAWINGS
Other aspects, features, and advantages of the present invention will become more fully apparent from the following detailed description, the appended claims, and the accompanying drawings in which:
Fig. 1 compares the useful capacities from the cells according to Example 1(-), Example 2(x), and Reference Example 1(~) as a function of the discharge current intensity;
Fig. 2 shows the capacities in cells according to Example 1 charged (-) and discharged as a function of the cycle number (z), where the broken curve (~) represents the discharged capacity up to a final discharge voltage of 1.8 V and the dotted curve (x) shows the additionally discharged capacity for a discharge down to 0 V;
Fig. 3 shows the charged and discharged capacities for cells according to Example 2;
Fig. 4 shows the discharge capacity of the cells according to Example 3 (x) and Example 4 (-) as a function of the cycle number (z); and Fig. 5 shows an exemplary button cell for the present invention.
DETAILED DESCRIPTION
Example 1 A graphite anode pasted in nickel foam (diameter 4.20 mm, height 0.71 mm), a 200-~m thick polypropylene separator, and a lithium oxide-cont~;n;ng cathode are installed in a button cell with an outer diameter of 6.8 mm and a height of 2.1 mm. 18 ~l of a 1-molar solution of LiCl04 in an organic CA 022~1068 1998-10-22 solvent mixture consisting of 30 vol.% EC, 20 vol.% DEC, and 50 vol.% PC is added as the electrolyte.
The cells are closed and tested for their capacity before and after high-temperature storage, their loadability, and their deep dischargeability.
Example 2 Button cells are produced according to Example 1 with the difference that LiPF6 is used as the conducting salt.
Reference Example 1 Button cells produced as in Example 1 contain as the electrolyte a 1-molar solution of LiCI04 in a solvent mixture consisting of 25 vol.% EC, 10 vol.% DEC, and 65 vol.% ethyl methyl carbonate (EMC).
Example 3 lS A round of lithium foil 0.31 mm thick and a graphite anode pasted in nickel foam are inserted in a button cell housing with a diameter of 6.8 mm and a height of 2.1 mm. A 200-11m thick polypropylene separator is used as the separator, and a lithium spinel-containing electrode is used as the cathode. The electrolyte consists of a 1-molar solution of LiPF6 in an organic solvent mixture consisting of 30 vol.%
EC, 20 vol.% DEC, and 50 vol.% PC.
Example 4 Button cells are produced as in Example 3 except that a 0.25-mm thick lithium foil is used.
Reference Example 2 Button cells are produced as in Example 4, but a 1-molar solution of LiPF6 in 15 vol.% EC, 50 vol.% DMC, and 35 vol.% PC is used as the electrolyte.
As Fig. 1 shows, the cells produced according to the invention have a higher useful capacity even at greater discharge current intensities. Figs. 2 and 3 show the surprising deep discharge strength of the cells according to the invention. In Table 1, the useful capacities according to the invention and the reference examples are contained, where n.d. = not determined. A comparison of the relative capacity loss after a high-temperature storage shows that the cells according to the invention suffer lower irreversible capacity loss.
FP 585-US -3- 065.6719 PATENT
CA 022~1068 1998-10-22 Table 1. Discharge capacity C in [mAh]
Trialwithout HT after HT direct HT relative storage storagestorage C
No. 1st 2nd 1st 2nd 1st 2nd loss [%]
cycle cycle cycle cycle cycle cycle Example 11.142 1.136 0.906 0.898 0.891 0.881 20.95 S Example 21.161 1.154 0.992 0.997 1.032 1.008 13.60 Ref. ex. 1 1.194 1.192 0.470 0.171 0.470 0.102 85.65 Example 31.247 1.202 0.757 0.822 0.891 0.916 31.61 Example 41.112 1.122 0.636 0.732 0.663 0.732 39.76 Ref. ex. 2 1.410 1.402 0.364 0.493 n.d. n.d. 64.84 It will be further understood that various changes in the details, materials, and arrangements of the parts which have been described and illustrated in order to explain the nature of this invention may be made by those skilled in the art without departing from the principle and scope of the invention as expressed in the following claims.
FP 585-US -4- 065.6719 PATEI~IT
Claims (15)
1. A secondary lithium ion cell comprising a carbon-containing anode material, a lithium-containing cathode material, and a nonaqueous electrolyte comprising a solution of a lithium salt in an organic solvent mixture which contains 20 to 40 vol.% ethylene carbonate, 15 to 30 vol.% diethyl carbonate, and 35 to 55 vol.% propylene carbonate.
2. The secondary lithium ion cell of claim 1, wherein the solvent mixture comprises 25 to 35 vol.%
ethylene carbonate, 20 to 25 vol.% diethyl carbonate, and 40 to 50 vol.% propylene carbonate.
ethylene carbonate, 20 to 25 vol.% diethyl carbonate, and 40 to 50 vol.% propylene carbonate.
3. The secondary lithium ion cell of claim 2, wherein the electrolyte contains 0.9 - 2.0 mole/1 LiClO4, LiPF6, LiSO3CF3, LiBF4, LiN(CF3SO2)3, or LiC(CF3SO2)3.
4. The secondary lithium ion cell of claim 2, wherein the carbon-containing anode material is provided with a metal conductor matrix.
5. The secondary lithium ion cell of claim 2, wherein the lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
6. The secondary lithium ion cell of claim 1, wherein the electrolyte contains 0.9 - 2.0 mole/l LiClO4, LiPF6, LiSO3CF3, LiBF4, LiN(CF3SO2)3, or LiC(CF3SO2)3.
7. The secondary lithium ion cell of claim 6, wherein the electrolyte contains 0.9 - 1.5 mole/l LiClO4 or LiPF6.
8. The secondary lithium ion cell of claim 6, wherein the carbon-containing anode material is provided with a metal conductor matrix.
9. The secondary lithium ion cell of claim 6, wherein the lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
10. The secondary lithium ion cell of claim 1, wherein the carbon-containing anode material is provided with a metal conductor matrix.
11. The secondary lithium ion cell of claim 10, wherein the metallic conductor matrix is a stainless steel band, a nickel stretched metal, or a nickel foam.
12. The secondary lithium ion cell of claim 10, wherein the lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
13. The secondary lithium ion cell of claim 1, wherein the lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
14. The secondary lithium ion cell of claim 1, wherein:
the solvent mixture comprises 25 to 35 vol.% ethylene carbonate, 20 to 25 vol.% diethyl carbonate, and 40 to 50 vol.% propylene carbonate;
the electrolyte contains 0.9 - 2.0 mole/l LiClO4, LiPF6, LiSO3CF3, LiBF4, LiN(CF3SO2)3, or LiC(CF3SO2)3;
the carbon-containing anode material is provided with a metal conductor matrix; and the lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
the solvent mixture comprises 25 to 35 vol.% ethylene carbonate, 20 to 25 vol.% diethyl carbonate, and 40 to 50 vol.% propylene carbonate;
the electrolyte contains 0.9 - 2.0 mole/l LiClO4, LiPF6, LiSO3CF3, LiBF4, LiN(CF3SO2)3, or LiC(CF3SO2)3;
the carbon-containing anode material is provided with a metal conductor matrix; and the lithium-containing cathode material is a lithiated pyrolusite or a lithium-manganese spinel.
15. The secondary lithium ion cell of claim 14, wherein:
the electrolyte contains 0.9 - 1.5 mole/l LiClO4 or LiPF6; and the metallic conductor matrix is a stainless steel band, a nickel stretched metal, or a nickel foam.
the electrolyte contains 0.9 - 1.5 mole/l LiClO4 or LiPF6; and the metallic conductor matrix is a stainless steel band, a nickel stretched metal, or a nickel foam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19747140.4 | 1997-10-24 | ||
| DE19747140A DE19747140A1 (en) | 1997-10-24 | 1997-10-24 | Secondary lithium-ion cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2251068A1 true CA2251068A1 (en) | 1999-04-24 |
Family
ID=7846583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002251068A Abandoned CA2251068A1 (en) | 1997-10-24 | 1998-10-22 | Secondary lithium ion cell |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0911901A1 (en) |
| JP (1) | JPH11195431A (en) |
| CA (1) | CA2251068A1 (en) |
| DE (1) | DE19747140A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6503663B1 (en) | 2000-05-05 | 2003-01-07 | Samsung Sdi Co., Ltd. | Organic electrolyte and lithium secondary battery |
| CN1921190A (en) * | 2006-09-22 | 2007-02-28 | 任晓平 | Secondary lithium ion battery or group employing foam metal as fluid collector |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4753859A (en) * | 1987-10-13 | 1988-06-28 | American Telephone And Telegraph Company, At&T Laboratories | Nonaqueous cell |
| FR2702311B1 (en) * | 1993-03-02 | 1995-04-14 | Accumulateurs Fixes | Electrolyte for rechargeable lithium generator. |
| US5643695A (en) * | 1995-09-26 | 1997-07-01 | Valence Technology, Inc. | Carbonaceous electrode and compatible electrolyte |
| JP3481063B2 (en) * | 1995-12-25 | 2003-12-22 | シャープ株式会社 | Non-aqueous secondary battery |
| JP3541913B2 (en) * | 1996-11-27 | 2004-07-14 | 株式会社デンソー | Non-aqueous electrolyte secondary battery |
-
1997
- 1997-10-24 DE DE19747140A patent/DE19747140A1/en not_active Withdrawn
-
1998
- 1998-08-27 EP EP98116148A patent/EP0911901A1/en not_active Withdrawn
- 1998-10-21 JP JP10299766A patent/JPH11195431A/en active Pending
- 1998-10-22 CA CA002251068A patent/CA2251068A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11195431A (en) | 1999-07-21 |
| EP0911901A1 (en) | 1999-04-28 |
| DE19747140A1 (en) | 1999-04-29 |
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| Date | Code | Title | Description |
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| FZDE | Discontinued |
Effective date: 20011022 |