CN103378359A - Battery electrode assembly - Google Patents
Battery electrode assembly Download PDFInfo
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- CN103378359A CN103378359A CN2012101302442A CN201210130244A CN103378359A CN 103378359 A CN103378359 A CN 103378359A CN 2012101302442 A CN2012101302442 A CN 2012101302442A CN 201210130244 A CN201210130244 A CN 201210130244A CN 103378359 A CN103378359 A CN 103378359A
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- lithium
- transition metal
- electrode assembly
- metal
- battery electrode
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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 relates to a battery electrode assembly. The battery electrode assembly comprises a current collector base layer and is characterized in that an active substance layer is distributed on the current collector base layer; electrode particles and silicon oxide containing conducting substances are distributed in the active substance layer; and meanwhile, the electrode particles comprise lithium-containing transition metal oxides, lithium-containing transition metal phosphates, lithium-free transition metal oxides, metals capable of forming alloys with lithium or alloys, oxides of metals capable of forming alloys with lithium and one of sulfur or sulfides or its composition. Thus, the battery electrode assembly has the advantages that the silicon oxide layer does not block lithium ions from getting in and out, the middle conducting substances can provide electrical contact without affecting the properties of the materials, and meanwhile, the stability of the interfaces of the electrode materials and electrolyte is improved due to existence of the silicon oxide layer, so that the battery has better cyclicity, safety and the like.
Description
Technical field
The present invention relates to a kind of electrode assemblie, relate in particular to a kind ofly, belong to the battery electrode assembly.
Background technology
Silica is the mobile powder of the amorphous white of synthetic material, has the strict particle size distribution of various specific areas and volume.This product is a kind of white, loose, amorphous, nontoxic, tasteless, odorless, free of contamination nonmetal oxide.Its primary particle diameter is between 7～80nm, and specific area is generally greater than 100m2/g.Because its nano effect shows the character such as remarkable reinforcement, thickening, thixotroping, insulation, delustring, resist sagging, thereby is widely used in the macromolecule industrial circles such as rubber, plastics, coating, adhesive, fluid sealant in material.
For field of batteries, the participation of silica can promote the using character of battery.
Summary of the invention
Purpose of the present invention is exactly in order to solve the above-mentioned problems in the prior art, provides a kind of
Purpose of the present invention is achieved through the following technical solutions:
The battery electrode assembly, include collector body basic unit, wherein: be distributed with active material layer in the described collector body basic unit, be distributed with electrode particle in the described active material layer and contain the silica of conductive materials, described electrode particle includes the transition metal oxide that contains lithium, contain the phosphate of the transition metal of lithium, do not contain lithium transition metal oxide, can with lithium form alloy metal or alloy, can form a kind of or its composition in oxide, sulphur or the sulfide of the metal of alloy with lithium.
Above-mentioned battery electrode assembly, wherein: the described transition metal oxide that contains lithium is with Li
xM
yO
zBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y and z decide according to valence state and the molecular structure of contained transition metal
Further, above-mentioned battery electrode assembly, wherein: the described phosphate that contains the transition metal of lithium is with Li
xM
y(PO
4)
zBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y and z decide according to valence state and the molecular structure of contained transition metal.
Further, above-mentioned battery electrode assembly, wherein: the described transition metal phosphate that does not contain lithium is with M
x(PO
4)
yBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y decide according to valence state and the molecular structure of contained transition metal.
Further, above-mentioned battery electrode assembly, wherein: describedly can include Al, Si, Ga, Ge, In, Sn, Sb, Pb, Bi with the metal that lithium forms alloy, comprise simultaneously the alloy of above-mentioned metal.
Further, above-mentioned battery electrode assembly, wherein: the described oxide that can form with lithium the metal of alloy is with M
xO
yBe the electrode material of general formula, M comprises Ga, Ge, In, Sn, Sb, Pb, Bi, and x and y decide according to the metallic valence state of institute and molecular structure.
Further, above-mentioned battery electrode assembly, wherein: described sulphur or sulfide comprise S and with M
xS
yBe the electrode material of general formula, x, y decide according to valence state and the molecular structure of contained transition metal.
Further, above-mentioned battery electrode assembly, wherein: described electrode particle size is 1 nanometer to 100 micron.
Further, above-mentioned battery electrode assembly, wherein: the mass ratio of described silica and electrode particle is 0.01:1 to 2:1.
Again further, above-mentioned battery electrode assembly, wherein: described conductive materials is material with carbon element.
The advantage of technical solution of the present invention is mainly reflected in: this silicon oxide layer does not hinder the turnover of lithium ion, conductive materials simultaneously can provide again and electrically contact, do not affect the performance of material, simultaneously because the existence of silicon oxide layer, the interface stability of electrode material and electrolyte improves, and makes battery have better cyclicity, fail safe etc.
Description of drawings
Purpose of the present invention, advantage and disadvantage will be for illustration and explanation by the non-limitative illustration of following preferred embodiment.These embodiment only are the prominent examples of using technical solution of the present invention, and all technical schemes of taking to be equal to replacement or equivalent transformation and forming all drop within the scope of protection of present invention.In the middle of these accompanying drawings,
Fig. 1 is the organigram of battery electrode assembly.
Embodiment
Battery electrode assembly as shown in Figure 1 includes collector body basic unit 1, and its special feature is: be distributed with active material layer in the collector body of the present invention basic unit 1.Specifically, in active material layer, be distributed with electrode particle 2 and the silica 3 that contains conductive materials 4.Simultaneously, electrode particle 2 include the transition metal oxide that contains lithium, contain the phosphate of the transition metal of lithium, do not contain the transition metal oxide of lithium, do not contain lithium transition metal phosphate, can with lithium form alloy metal or alloy, can form a kind of or its composition in oxide, sulphur or the sulfide of the metal of alloy with lithium.
With regard to the better execution mode of the present invention one, for the ease of the normal operation of battery, the transition metal oxide that contains lithium that the present invention adopts is with Li
xM
yO
zBe the electrode material of general formula, M is a kind of or two kinds or two or more metal.Such as Li(Ni
1/3Co
1/3Mn
1/3)
1/3O
2X, the y and the z that adopt decide according to valence state and the molecular structure of contained transition metal.Simultaneously, containing the phosphate of the transition metal of lithium, is with Li
xM
y(PO
4)
zBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y and z decide according to valence state and the molecular structure of contained transition metal.Can be LiFePO4, LiMnPO specifically
4, LiNiPO
4, LiCoPO
4, Li
3V
2(PO
4)
3
Further, not containing the transition metal oxide of lithium, is with M
xO
yBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y decide according to valence state and the molecular structure of contained transition metal.Give an example, it can be CoO
2, MnO
2, NiO
2The transition metal phosphate that does not contain lithium is with M
x(PO
4)
yBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y decide according to valence state and the molecular structure of contained transition metal.Give an example, it can be Co PO
4, Mn PO
4, Ni PO
4, Fe
0.8Mn
0.2PO
4
Again further, can form with lithium the oxide of the metal of alloy, be with M
xO
yBe the electrode material of general formula, M comprises Ga, Ge, In, Sn, Sb, Pb, Bi, and x and y decide according to the metallic valence state of institute and molecular structure.Simultaneously, the sulphur of employing or sulfide comprise S and with M
xS
yBe the electrode material of general formula, x, y decide according to valence state and the molecular structure of contained transition metal, such as CuS, TiS
2
And, with regard to actual finished product of the present invention should be used for see that electrode particle 2 sizes are 1 nanometer to 100 micron.The mass ratio of silica 3 and electrode particle 2 is for being 0.01:1 to 2:1.Moreover in order to improve the operational efficiency of battery, conductive materials is material with carbon element.
In conjunction with actual preparation of the present invention, the electrode material powder is well dispersed in the sodium silicate solution.During this period, the mass ratio of control electrode material and sodium carbonate is 0.1-100, and sodium silicate solution is 1mol/L with the molal volume ratio of dilute sulfuric acid.Afterwards, add graphite material and add dilute sulfuric acid and make it precipitation in this mixed solution.In this process, the mass ratio of electrode material and graphite is: 100-1, about 1 hour of sedimentation time.Then, the sediment that obtains is before washed post-drying.Specifically, the washing process of employing is that the 2-10 that each water consumption is the sediment quality doubly filters after the washing with distilled water washing 3-5 time.Sediment drying under 80 degree can be finished drying course in 5 hours.
Further each material proportioning can enter shown in the following table again:
Can find out by above-mentioned character express, after adopting the present invention, this silicon oxide layer does not hinder the turnover of lithium ion, conductive materials simultaneously can provide again and electrically contact, do not affect the performance of material, owing to the existence of silicon oxide layer, the interface stability of electrode material and electrolyte improves, and makes battery have better cyclicity, fail safe etc. simultaneously.
Claims (10)
1. battery electrode assembly, include collector body basic unit, it is characterized in that: be distributed with active material layer in the described collector body basic unit, be distributed with electrode particle in the described active material layer and contain the silica of conductive materials, described electrode particle includes the transition metal oxide that contains lithium, contain the phosphate of the transition metal of lithium, do not contain the phosphate of the transition metal of lithium, do not contain lithium transition metal oxide, can with lithium form alloy metal or alloy, can form a kind of or its composition in oxide, sulphur or the sulfide of the metal of alloy with lithium.
2. battery electrode assembly according to claim 1, it is characterized in that: the described transition metal oxide that contains lithium is with Li
xM
yO
zBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y and z decide according to valence state and the molecular structure of contained transition metal.
3. battery electrode assembly according to claim 1, it is characterized in that: the described phosphate that contains the transition metal of lithium is with Li
xM
y(PO
4)
zBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y and z decide according to valence state and the molecular structure of contained transition metal.
4. battery electrode assembly according to claim 1, it is characterized in that: the described transition metal phosphate that does not contain lithium is with M
x(PO
4)
yBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y decide according to valence state and the molecular structure of contained transition metal.
5. battery electrode assembly according to claim 1, it is characterized in that: the described transition metal oxide that does not contain lithium is with M
xO
yBe the electrode material of general formula, M is a kind of or two kinds or two or more metal, and x, y decide according to valence state and the molecular structure of contained transition metal.
6. battery electrode assembly according to claim 1 is characterized in that: describedly can include Al, Si, Ga, Ge, In, Sn, Sb, Pb, Bi with the metal that lithium forms alloy, comprise simultaneously the alloy of above-mentioned metal.
7. battery electrode assembly according to claim 1, it is characterized in that: the described oxide that can form with lithium the metal of alloy is with M
xO
yBe the electrode material of general formula, M comprises Ga, Ge, In, Sn, Sb, Pb, Bi, and x and y decide according to the metallic valence state of institute and molecular structure.
8. battery electrode assembly according to claim 1 is characterized in that: described sulphur or sulfide comprise S and with M
xS
yBe the electrode material of general formula, x, y decide according to valence state and the molecular structure of contained transition metal.
9. battery electrode assembly according to claim 1 is characterized in that: described electrode particle size is 1 nanometer to 100 micron.
10. battery electrode assembly according to claim 1, it is characterized in that: the mass ratio of described silica and electrode particle is 0.01:1 to 2:1; Described conductive materials is material with carbon element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101302442A CN103378359A (en) | 2012-04-28 | 2012-04-28 | Battery electrode assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101302442A CN103378359A (en) | 2012-04-28 | 2012-04-28 | Battery electrode assembly |
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| Publication Number | Publication Date |
|---|---|
| CN103378359A true CN103378359A (en) | 2013-10-30 |
Family
ID=49463162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101302442A Pending CN103378359A (en) | 2012-04-28 | 2012-04-28 | Battery electrode assembly |
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|---|---|
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102144323A (en) * | 2008-07-15 | 2011-08-03 | 陶氏环球技术公司 | Inorganic binders for battery electrodes and aqueous processing thereof |
-
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- 2012-04-28 CN CN2012101302442A patent/CN103378359A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102144323A (en) * | 2008-07-15 | 2011-08-03 | 陶氏环球技术公司 | Inorganic binders for battery electrodes and aqueous processing thereof |
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Application publication date: 20131030 |