CN1581536A - Cell and its preparing method - Google Patents
Cell and its preparing method Download PDFInfo
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- CN1581536A CN1581536A CNA03140085XA CN03140085A CN1581536A CN 1581536 A CN1581536 A CN 1581536A CN A03140085X A CNA03140085X A CN A03140085XA CN 03140085 A CN03140085 A CN 03140085A CN 1581536 A CN1581536 A CN 1581536A
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- China
- Prior art keywords
- battery
- ladder type
- negative pole
- multistage ladder
- sawtooth
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Secondary Cells (AREA)
Abstract
The disclosed battery includes a positive pole, a negative pole and barrier membrane between positive pole and negative pole. Surfaces of positive pole and negative pole faced to the said barrier membrane are as inner surfaces. There are multiple cascaded grooves or zigzag structure on inner surface. The preparation method includes steps: providing positive and negative poles; fabricating multiple cascaded grooves or zigzag structure on inner surface by using photo-etching technique. The disclosed battery increases energy density of battery remarkably, being suitable to lithium cell or macromolecule lithium cell.
Description
[technical field]
The present invention relates to a kind of battery and its preparation method.
[background technology]
Battery is one to convert chemical energy the device of electric energy to, because have portability, multiple combination, high-energy-density and do not have discharge noise and the advantage of waste gas, so be subjected to widespread usage in a lot of fields, especially computer (Computing), the 3C industry of communication (Communication) and consumption electronic products (ConsumerElectronics).
Battery mainly is made of four parts: electrode (containing positive pole and negative pole), electrolyte, spacer and tank body.The general method that improves energy content of battery density has two kinds: the one, the electrode material by exploitation high capacity capacity improves energy content of battery density, as cathode of lithium battery from the native graphite to the CNT (carbon nano-tube); The 2nd, by the reaction contact area that increases battery electrode energy content of battery density is improved.The reaction surface of general battery electrode is the flat surface or the porous surface structure of formation naturally, its effective electrode surface area (Surface Area ofElectrodes) only limits to react flat surface or porous surface, as in unit space, directly increasing the method for battery electrode or the bent battery electrode of employing crook, though can improve the battery electrode energy density, but corresponding increase volume of battery or weight are unfavorable for battery miniaturization development.
In view of this, provide a kind of energy content of battery density that increases but not increase the battery of battery volume or weight in fact for necessary.
[summary of the invention]
The object of the present invention is to provide a kind ofly can not increase the battery that energy content of battery density is increased.
Another object of the present invention is to provide the preparation method of above-mentioned battery.
For realizing the object of the invention, the invention provides a kind of battery, described battery comprises:
One positive pole; Towards a described anodal negative pole that is provided with;
And one barrier film between described positive pole and negative pole;
Positive pole and negative pole are inner surface towards the surface of barrier film;
At least one inner surface of described positive pole and negative pole has multistage ladder type groove of a plurality of nanoscales or sawtooth (zig-zag) structure.
The present invention also provides a kind of method for preparing above-mentioned battery, and it may further comprise the steps:
One battery electrode is provided, comprises an anodal and negative pole;
Use photoetching technique to be etched into multistage ladder type groove of a plurality of nanoscales or sawtooth (zig-zag) structure on the battery electrode surface.
Compared with prior art, the positive pole that the present invention discloses and the surface energy of multistage ladder type groove surfaces of a plurality of nanoscales of negative pole or sawtooth (zig-zag) structure make the ion of electrode reaction that more electrode surface area be arranged, and it is long-pending effectively to have increased electrode reaction surfaces under the situation that does not increase the battery volume and weight, reaches the effect that increases energy content of battery density.
[description of drawings]
Fig. 1 is the side schematic view of first embodiment, one lithium battery anode.
Fig. 2 is the side schematic view of the reticle plate in the photoetching for the first time.
Fig. 3 is the side schematic view that lithium battery anode applies photoresist layer.
Fig. 4 to Fig. 6 is that lithium battery anode exposes for the first time, development, etched step schematic diagram.
Fig. 7 is the side schematic view of a DU of lithium battery anode etching.
Fig. 8 is the side schematic view of the reticle plate of photoetching for the second time.
Fig. 9 is the side schematic view that the lithium battery anode of Fig. 7 applies photoresist layer.
Figure 10 to Figure 12 is that lithium battery anode exposes for the second time, development, etched step schematic diagram.
Figure 13 is the side schematic view of three DUs of lithium battery anode etching.
Figure 14 is the schematic diagram of first embodiment, one lithium battery.
Figure 15 is the schematic diagram of second embodiment, one lithium battery.
[embodiment]
As shown in figure 14, first embodiment of the invention is that example elaborates with the lithium battery: general lithium battery mainly comprises negative pole (Anode), anodal (Cathode), barrier film (Separator) and electrolyte (Electrolyte), in charge and discharge process, lithium ion can move between negative pole and positive pole.Anode material of lithium battery mainly is a lithium-containing transition metal oxide, comprises LiNiO
2, LiCoO
2And LiMn
2O
4Deng.Lithium cell cathode material mainly is to be carbon material and tin-oxide based on graphite.
Lithium battery of the present invention comprises a positive pole 10, and its material is LiCoO
2One negative pole 10 ' faces with positive pole 10, and its material is a graphite; One barrier film 12 is positioned between positive pole 10 and the negative pole 10 ', and its material is an organic polymer; Anodal 10 one sides towards barrier film 12 are inner surface 102, and inner surface 102 is the surfaces with the multistage ladder type groove structure of a plurality of nanoscales, and negative pole 10 ' has the multistage ladder type groove structure of identical a plurality of nanoscales.The multistage ladder type groove structure of these a plurality of nanoscales has effectively increased electrode reaction surfaces under the situation that does not increase the battery volume and weight long-pending, reaches the effect that increases energy content of battery density.
The first embodiment of the present invention is by photoetching technique etching to be carried out on the battery electrode surface, forms the surface with the multistage ladder type groove structure of a plurality of nanoscales.Now be that example is described photoetching process in detail with the lithium battery anode.
See also Fig. 1, a lithium battery anode 10 at first is provided.
For the inner surface 102 that makes lithium battery anode forms a flat surface, can make that inner surface 102 is smooth by methods such as mechanical polishing or chemical polishings.Its evenness is the smaller the better, forms easily in order to the subsequent step photoresist layer.
See also Fig. 2, a reticle plate 111 is provided, its resolution is 100lines/mm.This reticle plate size is identical with inner surface 102.
See also Fig. 3, on the inner surface 102 of lithium battery anode, form one deck photoresist layer 121.
See also Fig. 4, above-mentioned photoresist layer 121 is exposed.Put reticle plate 111 on photoresist layer 121 surfaces and aim at exposure.Aim at that exposure can go up with UV-irradiation at exposure machine (Aligner) or stepper (Stepper); Also can be directly with electron beam writing machine (E-beam writer), photograph bit by bit exposes to the sun.
See also Fig. 5, again with the photoresist layer flush away of exposure area, remaining photoresistance figure can be used as down together etched cover curtain (Masking) and uses after drying.
See also Fig. 6, on the battery electrode inner surface 102 that has developed, carry out photoetching or low-light and develop.At the dissolved position of photoresist layer 121, the smooth inner surface 102 of battery electrode is down etched groove, etching depth can be controlled by calculator.
See also Fig. 7,, remove photoresist layer 121, obtain having only the inner surface 102 of a step grating with solution corrosion lithium battery anode inner surfaces 102 such as potassium cyanide.
See also shown in Figure 8ly,, provide second reticle plate 112 for manufacturing multistage ladder type grating surface.These reticle plate 112 resolution are 300lines/mm.
See also Fig. 9 to shown in Figure 12, on the lithium battery anode inner surface 102 that Fig. 7 makes, repeat steps such as above coating photoresist layer 123, exposure, development, etching and removal residue photoresist layer 123 again, wherein etching depth is half of etching depth for the first time, can make lithium battery anode 10, as shown in figure 13 with a plurality of even multistage ladder type grooves.
See also shown in Figure 13, lithium battery anode according to method for preparing comprises an outer surface 102 ' and an inner surface 102, inner surface 102 is more than one the multistage ladder type groove structure of nanoscale, its each cycle 102T one has the ladder of a plurality of steps, each shoulder height 102h equates, shoulder height is less than 100 nanometers, and each step width 102b equates.
Can carry out on the cathode of lithium battery surface equally according to above-mentioned photoetching technique, its relevant technical conditions can make corresponding changes according to the characteristic of negative material to reach same technique effect.
The those of ordinary skill of described technical field learns easily, and the resolution by changing reticle plate can form asymmetric staged groove through photoetching repeatedly again, and above-mentioned groove can reach constructed effect equally.
See also shown in Figure 15ly, the second embodiment of the present invention is by photoetching technique photoetching to be carried out on the battery electrode surface, forms the surface with a plurality of nanoscale sawtooth (zig-zag) structure.
The battery lithium of present embodiment comprises: battery electrode contains anodal 11 and one negative pole 11 '; Between positive pole 11 and negative pole 11 ', a barrier film 12 is arranged.Anodal 11 surfaces towards barrier film 12 are inner surface 112, carve by photoetching technique at inner surface 112 and to have a plurality of sawtooth (zig-zag) structure, the spacing on anodal 11 inner surface 112 adjacent sawtooth tops is 1～100 nanometer, and negative pole 11 ' has identical a plurality of sawtooth (zig-zag) structure.
The improvement of the battery electrode surface texture of battery of the present invention is applicable to lithium battery, high-polymer lithium battery etc., can increase electrode surface area under the situation that does not increase the battery volume or weight, thereby improves battery capacity.
Claims (10)
1. battery, described battery comprises:
One positive pole; Towards a described anodal negative pole that is provided with;
And the barrier film between described positive pole and negative pole;
Positive pole and negative pole are inner surface towards the surface of barrier film, it is characterized in that described positive pole and negative pole have a plurality of multistage ladder type grooves or sawtooth (zig-zag) structure towards at least one mask of the inner surface of barrier film.
2. a kind of battery as claimed in claim 1 is characterized in that multistage ladder type groove structure comprises a plurality of cycles, and each cycle comprises the staged groove that more than one step formed.
3. a kind of battery as claimed in claim 2 is characterized in that the staged groove that multistage ladder type groove structure is a symmetrical structure.
4. a kind of battery as claimed in claim 2 is characterized in that the staged groove that multistage ladder type groove structure is a unsymmetric structure.
5. a kind of battery as claimed in claim 1, the shoulder height scope that it is characterized in that each cycle of multistage ladder type groove is 1～100 nanometer.
6. a kind of battery as claimed in claim 1 is characterized in that the most advanced and sophisticated spacing of adjacent sawtooth of sawtooth (zig-zag) structure is 1～100 nanometer.
7. the preparation method of a battery, it may further comprise the steps:
One battery electrode is provided, comprises an anodal and negative pole;
It is characterized in that using photoetching technique to be etched into a plurality of multistage ladder type grooves or sawtooth (zig-zag) structure at least one battery electrode surface.
8. the preparation method of a kind of battery as claimed in claim 7 is characterized in that using photoetching technique to be etched into a plurality of multistage ladder type grooves or sawtooth (zig-zag) structure on the battery electrode surface, comprises step by step following:
Form one deck photoresist layer at the battery electrode inner surface;
One light shield is placed on this photoresist layer top, and the resolution of this light shield is R;
Through overexposure, etching forms the single order groove on the battery electrode inner surface;
Repeat to manufacture reticle plate, exposure, etching, the resolution of use therein light shield is 3R, and the corresponding groove that obtains is 4 rank symmetry staged grooves.
9. the preparation method of a kind of battery as claimed in claim 8 is characterized in that exposure is to expose with ultraviolet photoetching or electron beam writing machine with exposure machine or stepper.
10. the preparation method of a kind of battery as claimed in claim 8 is characterized in that etching is with photoetching or low-light developing technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03140085XA CN1266785C (en) | 2003-08-03 | 2003-08-03 | Cell and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03140085XA CN1266785C (en) | 2003-08-03 | 2003-08-03 | Cell and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1581536A true CN1581536A (en) | 2005-02-16 |
| CN1266785C CN1266785C (en) | 2006-07-26 |
Family
ID=34579228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03140085XA Expired - Fee Related CN1266785C (en) | 2003-08-03 | 2003-08-03 | Cell and its preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1266785C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183819A (en) * | 2008-08-05 | 2014-12-03 | Sakti3有限公司 | Electrochemical cell including functionally graded components |
-
2003
- 2003-08-03 CN CNB03140085XA patent/CN1266785C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183819A (en) * | 2008-08-05 | 2014-12-03 | Sakti3有限公司 | Electrochemical cell including functionally graded components |
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| Publication number | Publication date |
|---|---|
| CN1266785C (en) | 2006-07-26 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20060726 Termination date: 20170803 |