CN109910337B - High-speed production method of flexible graphite polar plate with vertical lamellar structure - Google Patents
High-speed production method of flexible graphite polar plate with vertical lamellar structure Download PDFInfo
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Abstract
The invention relates to a high-speed production method of a flexible graphite polar plate with a vertical lamellar structure, which comprises the following steps: (1) The expanded graphite powder is put on a horizontal conveyor belt (5) in a stuffing box (8); (2) Preliminary rolling is carried out on graphite powder on a conveyor belt (5) by using a rough roll (7); (3) passing through a horizontal finishing mill; (4) Then the low-density flexible graphite plate enters a continuous vertical roller finishing mill group for continuous finish rolling; (5) Then the high-density flexible graphite plate enters a grooved roll for printing; (6) And cutting the printed flexible graphite plate by using a shearing device to obtain the vertical type lamellar unipolar plate. Compared with the prior art, the invention changes the horizontal lamellar structure into the vertical lamellar structure by utilizing the overturn of the lamellar structure in the flexible graphite plate, thereby greatly improving the electric conductivity and the thermal conductivity of the flexible graphite plate in the vertical direction.
Description
Technical Field
The invention relates to a fuel cell, in particular to a high-speed production method of a flexible graphite polar plate with a vertical lamellar structure.
Background
As a core component of the fuel cell, the bipolar plate plays key roles of electric conduction, heat conduction, cathode and anode gas isolation, pile structure support and the like. The polar plate is usually made of metal material, impermeable graphite, flexible graphite and the like. Because of high strength and high gas barrier property, the metal material can be used for preparing ultrathin plates, but has poor corrosion resistance and the like, so that a galvanic pile cannot have long service life when the bipolar plate is applied to the material. The impermeable graphite has excellent corrosion resistance and strong electric conduction and heat conduction capacity, so that the service life of the galvanic pile can be prolonged. However, the brittle nature of the material, the complex processing procedures, make it impossible to mass produce, resulting in high costs. The flexible graphite material solves the problem of difficult processing of the material on the basis of having the advantage of impermeable graphite. The material is used for preparing a light plate in a rolling mode, and then a monopole plate with a flow field is prepared by a mould pressing method. Continuous production can greatly reduce the processing cost of materials. In addition, the cost of the material itself is low. The material is thus a selected direction of fuel cell plate material.
The lamellar structure within the flexible graphite causes its electrical and thermal conductivity in the vertical and horizontal directions to exhibit anisotropy. In the prior art of their production, they are generally prepared by means of molding or rolling. Chinese patent CN101222052a describes a method for manufacturing a flexible graphite plate with grooves on both sides, which uses a mould pressing method to prepare the flexible graphite plate. The prior art has the following defects: because of the microstructure of the flexible graphite sheet, the graphite sheets are stacked in a continuous phase, resulting in anisotropy of conductivity and thermal conductivity in the horizontal and vertical directions. However, the electrical conductivity and thermal conductivity of the flexible graphite sheet produced by the prior art in the horizontal direction are far greater than those in the vertical direction, which is contrary to the requirement of the polar plate for high vertical direction electrical conductivity and thermal conductivity. Chinese patent CN106876724a discloses a roll-pressing production method of flexible graphite unipolar plate for fuel cell, which can continuously produce flexible graphite unipolar plate, and improve production efficiency. However, the technology is limited to continuous production of the traditional flexible graphite electrode plate, and cannot continuously produce the flexible graphite electrode plate with a vertical lamellar structure.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high-speed production method of the vertical lamellar structure flexible graphite polar plate, which is characterized in that the lamellar structure inside the flexible graphite plate is turned over to change the horizontal lamellar structure into the vertical lamellar structure, so that the electric conductivity and the heat conductivity of the flexible graphite plate in the vertical direction are greatly improved.
The aim of the invention can be achieved by the following technical scheme: a high-speed production method of a flexible graphite polar plate with a vertical lamellar structure is characterized by comprising the following steps:
1) Putting the expanded graphite powder on a horizontal conveyor belt in a stuffing box, and keeping the running speed of the conveyor belt matched with the stacking height of the expanded graphite powder, wherein the stacking height of the expanded graphite powder is 3-30 mm; the expanded graphite powder is put into the stuffing box through the feeding tank and the feeding mechanism. The stuffing box is a bottomless box body, and a conveying device is arranged at the bottom and comprises a front roller, a conveying belt and a rear roller. The width of the inner wall of the stuffing box can be freely adjusted according to the design. The conveying device is used for conveying the whole expanded graphite powder forwards, and the forward running speed is matched with the feeding speed to control the stacking height of the expanded graphite powder in the stuffing box.
2) By coarse materialThe roller carries out preliminary rolling on the graphite powder on the conveyor belt to obtain the graphite powder with the thickness of 1-10 mm and the density of 0.01-0.3 g/cm 3 Is a very low density flexible graphite sheet; the rough roller is arranged at the outlet of the stuffing box and matched with the rear roller to perform preliminary rolling on graphite powder. The rough roll is used for rough rolling the expanded graphite powder to form a block with extremely low density, and the block can be pushed forward on the supporting plate without loosening.
3) After passing through a horizontal finishing mill, the thickness is 0.1-3.0 mm, and the density is 0.05-0.60 g/cm 3 Is a low density flexible graphite sheet; the finishing roller has the function of rolling the block with extremely low density into a low-density flexible graphite plate, so that the block can conveniently enter a subsequent vertical roller continuous rolling unit. The horizontal finishing mill comprises an upper horizontal finish rolling roller and a lower horizontal finish rolling roller which are arranged in pairs up and down to form a finishing roller pair, the finishing roller pair is connected with a conveyor belt through a horizontal supporting plate, and graphite plates obtained by preliminary rolling are introduced into the finishing roller pair for finish rolling.
4) Then the low-density flexible graphite plate enters a continuous vertical roller finishing mill group for continuous finish rolling; the continuous vertical roll finishing mill group comprises a plurality of groups of vertical roll devices which are arranged continuously, each group of vertical roll devices comprises a combined unit consisting of a pair of vertical rolls and a pair of horizontal rolls, and a double vertical roll continuous rolling unit is arranged behind the combined unit. The vertical roller and the horizontal roller form a combined unit, the horizontal roller is positioned above and below the vertical roller, the arc roller surface of the vertical roller is contacted with the side wall of the flexible graphite plate, the horizontal roller is combined for limiting the thickness direction, and the flexible graphite plate biting and limiting device is arranged in front of the vertical roller device to guide the flexible graphite plate into the vertical roller device and limit the thickness. The double-vertical-roller continuous rolling unit is formed by arranging two pairs of vertical rollers in front and back, and the double-vertical-roller continuous rolling unit is utilized to widen the graphite plates. The number of the vertical roller devices can be continuously 1-10 according to the needs. The vertical roller and horizontal roller combined unit has the functions of limiting the width of the flexible graphite plate and providing friction force for driving the graphite plate to move forwards. The double vertical roll continuous rolling unit aims to rapidly widen the graphite plates. Wherein the height of the graphite plate biting and limiting device of each unit can be freely adjusted.
5) After finish rolling by a continuous vertical roll finishing mill group, the width direction of the low-density flexible graphite plate is reduced to 0.05 to 0.50 times of the original width, and the density of the sheet layer after overturning is 0.80 to 1.80g/cm 3 Is a high density flexible graphite sheet;
6) Then the high-density flexible graphite plate enters a grooved roll for printing; the grooved roll includes the hole pattern upper roll and the hole pattern lower roll that set up in pairs. The purpose of the grooved roller is to continuously print the graphite sheet.
7) And cutting the printed flexible graphite plate by using a shearing device to obtain the vertical type lamellar unipolar plate. The shearing device aims to rapidly shear the printed flexible graphite polar plate to obtain a single polar plate with a flow field.
Compared with the prior art, the invention has the following advantages:
(1) Realizing continuous production of the flexible graphite polar plate with the vertical lamellar structure and greatly improving the production efficiency.
(2) The electric conductivity and the heat conductivity of the flexible graphite polar plate in the vertical direction are greatly improved. Through experiments, the electric conductivity in the vertical direction is increased from 22.70S/cm to more than 1000S/cm of the common flexible graphite plate, and the heat conductivity is increased from 6.27W/m.K to more than 35W/m.K of the common flexible graphite plate.
(3) The resin impregnation time can be significantly reduced. The time for reaching 40% impregnation rate is shortened from 130min of the common flexible graphite plate to within 10 min.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
fig. 2 is a schematic diagram of a first vertical roll+horizontal roll combination.
In FIG. 1, 1 is a feed tank, 2 is a feeding mechanism, 3 is expanded graphite powder, 4 is a front roller, 5 is a conveyor belt, 6 is a rear roller, 7 is a rough roller, 8 is a stuffing box, 9 is a horizontal support plate, 10 is a horizontal finish rolling upper roller, 11 is a horizontal finish rolling lower roller, 12 is a low density flexible graphite sheet, 13 is a flexible graphite sheet biting and limiting device, 14 is a limiting lower roller, 15 is a limiting upper roller, 16 is a first pass vertical roller, 17 is a flexible graphite sheet biting and limiting device, 18 is a second pass vertical roller, 19 is a third pass vertical roller, 20 is a flexible graphite sheet biting and limiting device, 21 is a limiting upper roller, 22 is a limiting lower roller, 23 is a fourth pass vertical roller, 24 is a flexible graphite sheet biting and limiting device, 25 is a fifth vertical roller, 26 is a sixth vertical roller, 27 is a flexible graphite sheet biting and limiting device, 28 is a limiting upper roller, 29 is a limiting lower roller, 30 is a seventh pass vertical roll, 31 is a flexible graphite sheet biting and limiting device, 32 is an eighth pass vertical roll, 33 is a ninth pass vertical roll, 34 is a flexible graphite sheet biting and limiting device, 35 is a limiting upper roll, 36 is a limiting lower roll, 37 is a tenth pass vertical roll, 38 is a flexible graphite sheet biting and limiting device, 39 is an eleventh pass vertical roll, 40 is a twelfth pass vertical roll, 41 is a flexible graphite sheet biting and limiting device, 42 is a limiting upper roll, 43 is a limiting lower roll, 44 is a thirteenth pass vertical roll, 45 is a flexible graphite sheet biting and limiting device, 46 is a fourteenth pass vertical roll, 47 is a fifteenth pass vertical roll, 48 is a flexible graphite sheet biting and limiting device, 49 is a limiting upper roll, 50 is a limiting lower roll, 51 is a sixteenth pass vertical roll, 52 is a hole-type upper roll, 53 is a hole-type lower roll, 54 is a shearing device, 55 is a unipolar plate, 4 to 6 are expanded graphite powder conveying devices, 13 to 16, 20 to 23, 27 to 30, 34 to 37, 41 to 44, 48 to 51 are 6 groups of vertical roll and horizontal roll combined units, 17 to 19, 24 to 26, 31 to 33, 38 to 40, 45 to 47 are 5 groups of double vertical roll continuous rolling units, and 13 to 51 form a continuous vertical roll finishing mill unit;
in fig. 2, 14 is a limit lower roller, 15 is a limit upper roller, 161 is a right vertical roller, 162 is a left vertical roller, 131 is an upper biting and limiting device, and 132 is a lower biting and limiting device.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Example 1
As shown in fig. 1, a high-speed production method of a flexible graphite polar plate with a vertical lamellar structure comprises the following steps:
1. the method comprises the steps of putting expanded graphite powder 3 on a horizontal conveyor belt 5 in a stuffing box 8 through a feeding tank 1 and a feeding mechanism 2, wherein the stuffing box 8 is a bottomless box body, the bottom of the stuffing box is a conveyor belt 5, the conveyor belt 5 is driven by a front roller 4 and a rear roller 6 which are arranged in front of and behind the conveyor belt 5, the running speed of the conveyor belt is kept to be matched with the stacking height of the expanded graphite powder, and the stacking height of the expanded graphite powder is 3-30 mm;
2. a rough roll 7 is arranged at the outlet of the stuffing box 8, the rough roll 7 is matched with the rear roll 6, graphite powder on the conveyor belt 5 is primarily rolled by the rough roll 7, the height of the expanded graphite piled in the stuffing box is controlled to be 18mm in the embodiment, the width of the inner wall of the stuffing box 8 is adjusted to be 1520mm, and after passing through the rough roll 7, the whole height of the flexible graphite is compressed to be 6mm;
3. the transmission belt 5 is connected with a horizontal finishing mill through a horizontal supporting plate 9, the horizontal finishing mill comprises a horizontal finish rolling upper roller 10 and a horizontal finish rolling lower roller 11 which are arranged in pairs up and down to form a finishing roller pair, the extremely low density flexible graphite plate obtained in the step 2 is subjected to the horizontal finishing mill to obtain a low density flexible graphite plate with the height depression of 1.2mm, and the width and thickness direction dimensions of 1520mm multiplied by 1.2mm are obtained;
4. then the low-density flexible graphite sheet 12 enters a continuous vertical roller finishing mill group for continuous finishing; the continuous vertical roll finishing mill group comprises a plurality of groups of vertical roll devices which are arranged continuously, each group of vertical roll devices comprises a combined unit consisting of a pair of vertical rolls and a pair of horizontal rolls, and a double vertical roll continuous rolling unit is arranged behind the combined unit. As shown in fig. 2, taking the first combined machine set as an example to illustrate the structure, the combined machine set includes a horizontal roller (a lower limit roller 14, an upper limit roller 15), a first-pass vertical roller 16 (a right vertical roller 161, a left vertical roller 162), an upper biting and limiting device 131, a lower biting and limiting device 132, the lower limit roller 14 and the upper limit roller 15 are respectively located on the upper and lower sides of the right vertical roller 161 and the left vertical roller 162, and are provided with flexible graphite sheet biting and limiting devices 13 (including the upper biting and limiting device 131 and the lower biting and limiting device 132). The arc roller surface of the vertical roller is contacted with the side wall of the flexible graphite plate, the horizontal roller is combined to limit the thickness direction, and the flexible graphite plate is clamped in front of the vertical roller device and is guided into the vertical roller device by the limiting device, and the thickness is limited. The double vertical roll continuous rolling unit is arranged behind the combined unit: the second-pass vertical roll 18 and the third-pass vertical roll 19 are used for widening the graphite plates by utilizing a double-vertical-roll continuous rolling unit. A flexible graphite plate biting and limiting device 17 is also arranged in front of the second pass vertical roll 18.
As shown in fig. 1, among the plural sets of continuous vertical roll finishing mill sets, after the first set of vertical roll finishing mill sets, there are sequentially provided: the flexible graphite sheet biting and limiting device 20, the limiting upper roller 21, the limiting lower roller 22, the fourth pass vertical roller 23, the flexible graphite sheet biting and limiting device 24, the fifth pass vertical roller 25, the sixth pass vertical roller 26, the flexible graphite sheet biting and limiting device 27, the limiting upper roller 28, the limiting lower roller 29, the seventh pass vertical roller 30, the flexible graphite sheet biting and limiting device 31, the eighth pass vertical roller 32, the ninth pass vertical roller 33, the flexible graphite sheet biting and limiting device 34, the limiting upper roller 35, the limiting lower roller 36, the tenth pass vertical roller 37, the flexible graphite sheet biting and limiting device 38, the eleventh pass vertical roller 39, the twelfth pass vertical roller 40, the flexible graphite sheet biting and limiting device 41, the limiting upper roller 42, the limiting lower roller 43, the thirteenth pass vertical roller 44, the flexible graphite sheet biting and limiting device 45, the fourteenth pass vertical roller 46, the fifteenth pass vertical roller 47, the flexible graphite sheet biting and limiting device 48, the limiting upper roller 49, the limiting lower roller 50, the sixteenth pass vertical roller 51.
The gap of each flexible graphite plate biting and limiting device is 1.3mm, and the width of the roll gap of the horizontal roll is 1.2mm. After passing through the continuous vertical roll finishing mill group, the width of the low-density flexible graphite plate is reduced from 1520mm to 152mm, and the height is kept to be 1.2mm, so that the high-density vertical lamellar flexible graphite plate is formed.
5. After finish rolling by a continuous vertical roll finishing mill group, the width direction of the low-density flexible graphite plate is reduced to 0.05 to 0.50 times of the original width, and the density of the sheet layer after overturning is 0.80 to 1.80g/cm 3 Is a high density flexible graphite sheet;
6. then the high-density flexible graphite plate enters a grooved roll for printing; the grooved rolls include an upper grooved roll 52 and a lower grooved roll 53 arranged in pairs. The purpose of the grooved roller is to continuously print the graphite plate to obtain the vertical lamellar flexible graphite plate with the flow field, wherein the width and height dimensions of the vertical lamellar flexible graphite plate are 152mm multiplied by 1 mm.
7. The printed flexible graphite plate is cut by a cutting device 54 to obtain a vertical lamellar single-plate, and the purpose of the cutting device is to rapidly cut the printed flexible graphite plate to obtain a vertical lamellar single-plate 55 with a flow field, wherein the size of the vertical lamellar single-plate is 152mm multiplied by 320mm multiplied by 1.2mm.
Example 2
A manufacturing method for continuously producing vertical lamellar flexible graphite plates comprises the following steps:
(1) The method comprises the steps of putting expanded graphite powder on a horizontal conveyor belt in a stuffing box through a feeding tank and a feeding mechanism, keeping the running speed of the conveyor belt matched with the stacking height of the expanded graphite powder, and ensuring the stacking height of the expanded graphite powder to be 3mm;
(2) Preliminary rolling is carried out on graphite powder by using a rough roll to obtain the graphite powder with the thickness of 1mm and the density of 0.01g/cm 3 Is a very low density flexible graphite sheet;
(3) After passing through a horizontal finishing mill, a thickness of 0.1mm and a density of 0.05g/cm were obtained 3 Is a low density flexible graphite sheet;
(4) And then the low-density flexible graphite plate enters a vertical roller device and is combined with a horizontal roller to limit the thickness direction. Because the arc-shaped roller surface of the vertical roller is contacted with the side wall of the flexible graphite plate, the polar plate collapses in the vertical roller rolling process if a limiting device is not arranged above the arc-shaped roller surface. In order to ensure that the flexible graphite plate smoothly enters the vertical roller device, the flexible graphite plate is guided into the vertical roller device by utilizing a flexible graphite plate biting device before the vertical roller device, and the thickness is limited;
(5) After passing through a continuous vertical roll finishing mill group, the width direction of the low-density flexible graphite plate is reduced to 0.05 times of the original width, and the density of the sheet layer after overturning is 0.80g/cm 3 Is a high density flexible graphite sheet;
(6) Then the high-density flexible graphite plate enters a grooved roll for printing;
(7) And cutting the printed flexible graphite plate by using a shearing device to obtain the vertical type lamellar unipolar plate.
Example 3
A manufacturing method for continuously producing vertical lamellar flexible graphite plates comprises the following steps:
(1) The method comprises the steps of putting expanded graphite powder on a horizontal conveyor belt in a stuffing box through a feeding tank and a feeding mechanism, keeping the running speed of the conveyor belt matched with the stacking height of the expanded graphite powder, and ensuring that the stacking height of the expanded graphite powder is 30mm;
(2) Preliminary rolling is carried out on graphite powder by using a rough roll to obtain the graphite powder with the thickness of 10mm and the density of 0.3g/cm 3 Is a very low density flexible graphite sheet;
(3) After passing through a horizontal finishing mill, a thickness of 3.0mm and a density of 0.60g/cm were obtained 3 Is a low density flexible graphite sheet;
(4) And then the low-density flexible graphite plate enters a vertical roller device and is combined with a horizontal roller to limit the thickness direction. Because the arc-shaped roller surface of the vertical roller is contacted with the side wall of the flexible graphite plate, the polar plate collapses in the vertical roller rolling process if a limiting device is not arranged above the arc-shaped roller surface. In order to ensure that the flexible graphite plate smoothly enters the vertical roller device, the flexible graphite plate is guided into the vertical roller device by utilizing a flexible graphite plate biting device before the vertical roller device, and the thickness is limited;
(5) After passing through a continuous vertical roll finishing mill group, the width direction of the low-density flexible graphite plate is reduced to 0.50 times of the original width, and the density of the sheet layer after overturning is 1.80g/cm 3 Is a high density flexible graphite sheet;
(6) Then the high-density flexible graphite plate enters a grooved roll for printing;
(7) And cutting the printed flexible graphite plate by using a shearing device to obtain the vertical type lamellar unipolar plate.
Claims (8)
1. A high-speed production method of a flexible graphite polar plate with a vertical lamellar structure is characterized by comprising the following steps:
(1) The method comprises the steps of putting expanded graphite powder on a horizontal conveyor belt (5) in a stuffing box (8), and keeping the running speed of the conveyor belt matched with the stacking height of the expanded graphite powder, wherein the stacking height of the expanded graphite powder is 3-30 mm;
(2) Preliminary rolling is carried out on graphite powder on a conveyor belt (5) by using a rough roll (7) to obtain the graphite powder with the thickness of 1-10 mm and the density of 0.01-0.3 g/cm 3 Is a very low density flexible graphite sheet;
(3) After passing through a horizontal finishing mill, the thickness is 0.1-3.0 mm, and the density is 0.05-0.60 g/cm 3 Is a low density flexible graphite sheet;
(4) Then the low-density flexible graphite plate enters a continuous vertical roller finishing mill group for continuous finish rolling; the continuous vertical roll finishing mill group comprises a plurality of groups of vertical roll devices which are arranged continuously, each group of vertical roll devices comprises a combined unit consisting of a pair of vertical rolls and a pair of horizontal rolls, and a double vertical roll continuous rolling unit is arranged behind the combined unit; the vertical roller and the horizontal roller form a combined unit, the horizontal roller is positioned above and below the vertical roller, the arc roller surface of the vertical roller is contacted with the side wall of the flexible graphite plate, the horizontal roller is combined for limiting in the thickness direction, and a flexible graphite plate biting and limiting device is arranged in front of the vertical roller device to guide the flexible graphite plate into the vertical roller device and limit the thickness;
(5) After finish rolling by a continuous vertical roll finishing mill group, the width direction of the low-density flexible graphite plate is reduced to 0.05 to 0.50 times of the original width, and the density of the sheet layer after overturning is 0.80 to 1.80g/cm 3 Is a high density flexible graphite sheet;
(6) Then the high-density flexible graphite plate enters a grooved roll for printing;
(7) And cutting the printed flexible graphite plate by using a shearing device to obtain the vertical type lamellar unipolar plate.
2. The high-speed production method of the flexible graphite polar plate with the vertical lamellar structure according to claim 1, wherein the expanded graphite powder in the step (1) is put into a stuffing box (8) through a feeding tank (1) and a feeding mechanism (2).
3. The high-speed production method of the flexible graphite polar plate with the vertical lamellar structure according to claim 1, wherein the stuffing box (8) in the step (1) is a bottomless box body, and a conveying device is arranged at the bottom and comprises a front roller (4), a conveying belt (5) and a rear roller (6).
4. A method for producing flexible graphite plates with vertical lamellar structure at high speed according to claim 3, characterized in that the rough roll (7) in step (2) is arranged at the outlet of the stuffing box (8) and matched with the rear roll (6), and graphite powder is subjected to preliminary rolling.
5. The high-speed production method of a flexible graphite sheet of vertical lamellar structure according to claim 1, characterized in that the horizontal finishing mill in step (3) comprises a horizontal finishing upper roll (10) and a horizontal finishing lower roll (11) arranged in pairs up and down to form a finishing roll pair, the finishing roll pair is connected to a conveyor belt (5) through a horizontal support plate (9), and the graphite sheet obtained by preliminary rolling is introduced into the finishing roll pair for finish rolling.
6. The high-speed production method of the flexible graphite polar plate with the vertical lamellar structure, which is characterized in that the double-vertical-roller continuous rolling unit is formed by arranging two pairs of vertical rollers in front of and behind each other, and the double-vertical-roller continuous rolling unit is utilized to widen the graphite polar plate.
7. The high-speed production method of the flexible graphite polar plate with the vertical lamellar structure according to claim 1, wherein 1-10 vertical roller devices can be arranged continuously.
8. The high-speed production method of a flexible graphite plate of vertical lamellar structure according to claim 1, characterized in that the grooved rolls in the step (6) comprise an upper grooved roll (52) and a lower grooved roll (53) arranged in pairs.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194188A (en) * | 1997-03-24 | 1998-09-30 | 片山特殊工业株式会社 | Metal sheet, its producing method and electrode using said metal sheet battery |
| CN107324829A (en) * | 2017-07-11 | 2017-11-07 | 广东思泉新材料股份有限公司 | A kind of preparation method of graphite flake |
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| US6881604B2 (en) * | 1999-05-25 | 2005-04-19 | Forskarpatent I Uppsala Ab | Method for manufacturing nanostructured thin film electrodes |
| EP1588994B1 (en) * | 2004-04-16 | 2007-10-24 | Sgl Carbon Ag | Method for the production of shaped bodies of expanded graphite |
| US20090151847A1 (en) * | 2007-12-17 | 2009-06-18 | Aruna Zhamu | Process for producing laminated exfoliated graphite composite-metal compositions for fuel cell bipolar plate applications |
| JP6067636B2 (en) * | 2014-09-12 | 2017-01-25 | トヨタ自動車株式会社 | Method for producing electrode for lithium ion secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194188A (en) * | 1997-03-24 | 1998-09-30 | 片山特殊工业株式会社 | Metal sheet, its producing method and electrode using said metal sheet battery |
| CN107324829A (en) * | 2017-07-11 | 2017-11-07 | 广东思泉新材料股份有限公司 | A kind of preparation method of graphite flake |
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