CN209389133U - A kind of high-pressure solid, high-flexibility metatitanic acid pole piece - Google Patents
A kind of high-pressure solid, high-flexibility metatitanic acid pole piece Download PDFInfo
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- CN209389133U CN209389133U CN201821235251.8U CN201821235251U CN209389133U CN 209389133 U CN209389133 U CN 209389133U CN 201821235251 U CN201821235251 U CN 201821235251U CN 209389133 U CN209389133 U CN 209389133U
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- pole piece
- lithium titanate
- lithium
- metatitanic acid
- aluminium foil
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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
Abstract
A kind of high-pressure solid, high-flexibility metatitanic acid pole piece, comprising: aluminium foil, metatitanic acid lithium coating, wherein, the metatitanic acid lithium coating is coated in aluminium foil both side surface；Metatitanic acid lithium coating includes: little particle lithium titanate, conventional ball lithium titanate particle, little particle lithium titanate in the metatitanic acid lithium coating is filled at the gap between conventional ball lithium titanate particle, and the little particle lithium titanate is bonded together by PVDF glue and conventional ball lithium titanate particle.Be using mixing two kinds of pattern lithium titanates method, spherical lithium titanate and little particle lithium titanate are mixed into homogenate according to a certain percentage, prepare mixed slurry be coated in aluminium foil on, drying, roll, cutting prepares pole piece.Due to little particle large specific surface area, be conducive to binder and conductive agent is uniformly distributed, cementability is good, and extruding of the bulky grain to aluminium foil is buffered when rolling, and small, not cracky is damaged to aluminium foil, pole piece flexibility is good, is conducive to compacted density raising, and easy to operate.
Description
Technical field
The utility model belongs to field of lithium ion battery, is related to the manufacture of a kind of high-pressure solid, high-flexibility metatitanic acid pole piece
Method.
Background technique
Lithium ion battery energy density height, good cycle, it is environmental-friendly, it is widely used in the neck such as electric vehicle, number, energy storage
Domain.Classify according to negative electrode material, lithium ion battery mainly includes graphite system, lithium titanate system and silicon-carbon system, silicon-carbon system
It is not mature enough at present.Compared with graphite cathode material, lithium titanate (Li4Ti5O12, LTO) material of spinel structure is steady safely
It is qualitative good, Li dendrite will not be precipitated because itself intercalation potential is higher, in charge and discharge process and pierce through diaphragm, avoid causing battery short
Road；Resistance to width warm nature can be good, and lithium titanate, can normal charge and discharge at subzero 50 DEG C to 60 DEG C above freezing due to its reasons in structure；Fast charge
It has excellent performance, lithium titanate has three-dimensional lithium ion tunnel, can be with high power charging-discharging；It has extended cycle life.
Lithium titanate material has distinct disadvantage, and as negative electrode material, voltage is higher than graphite cathode, and energy per volume is small,
Pole piece compaction density can be improved in a limited space keeps pole piece thinner, increases pole piece length, the appearance of Lai Tigao unit volume
Amount, but compacted density will lead to greatly very much aluminium foil and be squeezed seriously, aggravation deformation, pole piece flexibility is deteriorated, and causes pole piece impaired
Even it is broken.
At present improve the flexible method of pole piece mainly have dissimilar material layered coated, addition corpus fibrosum, addition graphene,
Pole piece hot-rolling pressure etc..
It is flexible to improve pole piece by graphene is modified and prepare combined conductive agent by patent CN201610991423.3
Property, improve battery high rate performance and cycle performance.The disadvantage is that graphene is at high cost, and the method process provided in patent compared with
It is more, it is unfavorable for operating.
Patent CN204947009U is by designing a kind of pole piece structure, the applied in two coats different materials on aluminium foil, keeps aluminium
The integrality and mechanical strength of foil, improve the flexibility of pole piece.The disadvantage is that materials at two layers is different, battery is two in charge and discharge process
Kind material structure variation is different, may generate stress, will affect battery performance.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provides a kind of high-pressure solid, the system of high-flexibility metatitanic acid pole piece
Method is made, the compacted density of metatitanic acid pole piece is improved, while not influencing the flexibility of pole piece.
A kind of high-pressure solid, high-flexibility metatitanic acid pole piece, comprising: aluminium foil, metatitanic acid lithium coating, wherein, the metatitanic acid
Lithium coating is coated in aluminium foil both side surface；Metatitanic acid lithium coating includes: little particle lithium titanate, conventional ball lithium titanate particle, institute
The little particle lithium titanate in metatitanic acid lithium coating stated is filled at the gap between conventional ball lithium titanate particle, and described small
Grain lithium titanate is bonded together by PVDF glue and conventional ball lithium titanate particle.
Further, the metatitanic acid lithium coating is coated in the two sides table of aluminium foil by conductive agent and the mixing of PVDF glue
Face.
Further, the lithium titanate, conductive agent, PVDF mixed proportion be 92:5:3.
The electrode slice of request for utilization and the specific Contrast on effect of traditional electrode piece are as follows:
1# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 1.6g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
2# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 1.8g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
3# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 2.0g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
4# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 2.2g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 5# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 1.6g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 6# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 1.8g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 7# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 2.0g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 8# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 2.2g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Electrical property detection is carried out to above-mentioned battery, charging/discharging voltage is limited in 1.5-2.7 V.
As can be seen that the pole piece flexibility of method preparation provided by the invention is good, it can achieve higher compacted density, have
Capacity is improved conducive to battery.Pole piece flexibility is good, and core is close after winding, and internal resistance is small, and high rate performance is excellent.
It is using two kinds of pattern lithium titanates of mixing the present invention provides a kind of high-pressure solid, high-flexibility metatitanic acid pole piece
Spherical lithium titanate and little particle lithium titanate are mixed homogenate by method according to a certain percentage, are prepared mixed slurry and are coated on aluminium foil,
Drying, roll, cutting prepares pole piece.Its small particles lithium titanate is by the broken preparation of spherical lithium titanate.Since little particle compares table
Area is big, is conducive to binder and conductive agent is uniformly distributed, and cementability is good, and extruding of the bulky grain to aluminium foil is buffered when rolling, right
Aluminium foil damage is small, not cracky, and pole piece flexibility is good, is conducive to compacted density raising, and easy to operate.
Detailed description of the invention
Fig. 1 is pole piece structure schematic diagram；
Fig. 2 is battery multiplying power charging performance comparison prepared by the 1#-4# of request for utilization；
Fig. 3 is the battery multiplying power charging performance comparison of traditional electrode piece 5#-8# preparation；
Wherein, 1, little particle lithium titanate, 2, aluminium foil；3, conventional ball lithium titanate；1#, 1# scheme curve graph；2#, the side 2#
Case curve graph；3#, 3# scheme curve graph；4#, 4# scheme curve graph；5#, 5# scheme curve graph；6#, 6# scheme curve graph；7#,
7# scheme curve graph；8#, 8# scheme curve graph.
Specific embodiment
Below in conjunction with attached drawing and preferred embodiment, to according to specific embodiment provided by the utility model, structure, feature
And its effect, detailed description is as follows.
A kind of high-pressure solid, high-flexibility metatitanic acid pole piece, comprising: aluminium foil 2, metatitanic acid lithium coating, wherein, the metatitanic acid
Lithium coating is coated in 2 both side surface of aluminium foil；Metatitanic acid lithium coating includes: little particle lithium titanate 1, conventional ball lithium titanate particle 3,
Little particle lithium titanate 1 in the metatitanic acid lithium coating is filled at the gap between conventional ball lithium titanate particle 3, described
Little particle lithium titanate 1 is bonded together by PVDF glue with conventional ball lithium titanate particle 3.
The metatitanic acid lithium coating is coated in the both side surface of aluminium foil 2 by conductive agent and the mixing of PVDF glue.
1), prepared by little particle lithium titanate material
Conventional lithium titanate material is spherical, usual D50 >=5 μm, and spherical lithium titanate D50 used in the present invention is (5 ~ 20) μm,
3 m2/g of BET <.Spherical lithium titanate is crushed by airslide disintegrating mill, prepares little particle lithium titanate, D50≤1 μm, BET > 4
m2/g。
2), a certain proportion of PVDF glue, conductive agent, little particle lithium titanate, spherical lithium titanate material are mixed, preparation slurry
Slurry is coated on the two sides of aluminium foil according to certain surface density, rolls, cut according to certain compacted density after drying by material
After obtain pole piece.
Embodiment 1: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density (1.6-2.2) g/cc, cutting obtains pole piece.Work is routinely made according to lithium battery
Skill, using cobalt acid lithium pole piece as positive plate, using polyethylene, polypropylene composite materials diaphragm, three components of 1.0 mol/L LiPF6 are mixed
Solvent EC/DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
Embodiment 2
The PVDF glue, conductive agent, conventional ball lithium titanate material of same ratio are mixed according to same process, preparation slurry
Material, according to identical surface density by slurry be coated in aluminium foil two sides on, drying, according to compacted density (1.6-2.2) g/cc into
Row rolls, and obtains pole piece.According to lithium battery conventional fabrication process, using cobalt acid lithium pole piece as positive plate, polyethylene, polypropylene are used
Three component mixed solvent EC/DMC/EMC (three solvent volume ratios are 1:1:1) solution of composite diaphragm, 1.0 mol/L LiPF6 is
Electrolyte is assembled into 60138 battery of cylinder.
It is using two kinds of shapes of mixing the present invention provides a kind of high-pressure solid, the manufacturing method of high-flexibility metatitanic acid pole piece
Spherical lithium titanate and little particle lithium titanate are mixed homogenate by the method for looks lithium titanate according to a certain percentage, prepare mixed slurry painting
Overlay on aluminium foil, drying, roll, cutting prepares pole piece.Its small particles lithium titanate is by the broken preparation of spherical lithium titanate.Due to
Little particle large specific surface area, is conducive to binder and conductive agent is uniformly distributed, and cementability is good, and bulky grain is buffered when rolling to aluminium foil
Extruding, small, not cracky is damaged to aluminium foil, pole piece flexibility is good, is conducive to compacted density raising, and easy to operate.
The electrode slice of request for utilization and the specific Contrast on effect of traditional electrode piece are as follows:
1# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 1.6g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
2# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 1.8g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
3# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 2.0g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
4# scheme: according to conventional batteries pole piece manufacture craft, by a certain proportion of PVDF glue, conductive agent, little particle titanium
Sour lithium material, spherical lithium titanate material mixing, prepare slurry, slurry are coated in the two sides of aluminium foil according to certain surface density
On, it is rolled after drying according to compacted density 2.2g/cc, cutting obtains pole piece.According to lithium battery conventional fabrication process, with cobalt
Sour pole piece is positive plate, uses polyethylene, polypropylene composite materials diaphragm, the three component mixed solvent EC/ of 1.0 mol/L LiPF6
DMC/EMC (three solvent volume ratios are 1:1:1) solution is electrolyte, is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 5# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 1.6g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 6# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 1.8g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 7# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 2.0g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Traditional electrode piece compares 8# scheme: according to same process by PVDF glue, conductive agent, the conventional ball of same ratio
Lithium titanate material mixing, prepares slurry, slurry is coated on the two sides of aluminium foil according to identical surface density, drying, according to pressure
Real density 2.2g/cc is rolled, and pole piece is obtained.Make according to lithium battery conventional fabrication process using cobalt acid lithium pole piece as positive plate
With polyethylene, polypropylene composite materials diaphragm, three component mixed solvent EC/DMC/EMC (three solvent volumes of 1.0 mol/L LiPF6
Than being electrolyte for 1:1:1) solution, it is assembled into 60138 battery of cylinder.
Electrical property detection is carried out to above-mentioned battery, charging/discharging voltage is limited in 1.5-2.7 V.
As can be seen that the pole piece flexibility of method preparation provided by the invention is good, it can achieve higher compacted density, have
Capacity is improved conducive to battery.Pole piece flexibility is good, and core is close after winding, and internal resistance is small, and high rate performance is excellent.
The utility model is described in detail above by embodiment, but the content is only the utility model
Preferred embodiment should not be considered as limiting the scope of the present invention.It is all to be made according to application scope of the utility model
All the changes and improvements etc., should still belong within the patent covering scope of the utility model.
Claims (2)
1. a kind of high-pressure solid, high-flexibility metatitanic acid pole piece, comprising: aluminium foil, metatitanic acid lithium coating, wherein, the lithium titanate
Coating is coated in aluminium foil both side surface；Metatitanic acid lithium coating includes: little particle lithium titanate, conventional ball lithium titanate particle, described
Metatitanic acid lithium coating in little particle lithium titanate be filled at the gap between conventional ball lithium titanate particle, the little particle
Lithium titanate is bonded together by PVDF glue and conventional ball lithium titanate particle.
2. a kind of high-pressure solid according to claim 1, high-flexibility metatitanic acid pole piece, it is characterised in that: the metatitanic acid
Lithium coating is coated in the both side surface of filter plate by conductive agent and the mixing of PVDF glue.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235251.8U CN209389133U (en) | 2018-08-02 | 2018-08-02 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235251.8U CN209389133U (en) | 2018-08-02 | 2018-08-02 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
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| Publication Number | Publication Date |
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| CN209389133U true CN209389133U (en) | 2019-09-13 |
Family
ID=67868865
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| CN201821235251.8U Expired - Fee Related CN209389133U (en) | 2018-08-02 | 2018-08-02 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004177A (en) * | 2018-08-02 | 2018-12-14 | 天津普兰能源科技有限公司 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
| CN109004178A (en) * | 2018-08-02 | 2018-12-14 | 天津普兰能源科技有限公司 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
-
2018
- 2018-08-02 CN CN201821235251.8U patent/CN209389133U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004177A (en) * | 2018-08-02 | 2018-12-14 | 天津普兰能源科技有限公司 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
| CN109004178A (en) * | 2018-08-02 | 2018-12-14 | 天津普兰能源科技有限公司 | A kind of high-pressure solid, high-flexibility metatitanic acid pole piece |
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