CN104003371A - Method for preparing porous carbon material used for super capacitor through using cashmere wool as raw material - Google Patents
Method for preparing porous carbon material used for super capacitor through using cashmere wool as raw material Download PDFInfo
- Publication number
- CN104003371A CN104003371A CN201410261771.6A CN201410261771A CN104003371A CN 104003371 A CN104003371 A CN 104003371A CN 201410261771 A CN201410261771 A CN 201410261771A CN 104003371 A CN104003371 A CN 104003371A
- Authority
- CN
- China
- Prior art keywords
- porous carbon
- carbon material
- cashmere
- raw material
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a method for preparing porous carbon material used for a super capacitor through using cashmere wool as raw material and belongs to the field of new energy technologies. According to the method for preparing the porous carbon material, the cashmere wool is used as the raw material, the cashmere wool is washed clean, then high-temperature pre-carbonization is performed on the cashmere wool to obtain a carbon precursor, and then an alkali metal hydroxide activation method is used for obtaining the porous active carbon material used for the super capacitor. The cashmere wool biological material is sufficiently used, the raw material is novel, cost is low, the source is wide, and the prepared porous carbon material richens micropore / mesoporous multi-level pore passages, is large in specific area and excellent in super capacitance performance and has great industrialization prospects and practical value.
Description
Technical field
The invention belongs to technical field of new energies, be specifically related to the preparation method of porous carbon material for supercapacitor.
Background technology
Ultracapacitor, is called again electrochemical capacitor, is a kind of novel power-type electronic devices and components.It has the large electric current fast charging and discharging characteristic of electrical condenser between battery and ordinary capacitor, also has the high energy storage characteristic of battery simultaneously, and long service life, can not pollute surrounding enviroment, and be a kind of desirable environmental protection energy storage device.Nowadays supercapacitor applications is very extensive, and no matter high-power start system, the energy work rate system of electromobile etc. of the power supply of the standby power supply of storer, electronic toy, space missile transmitting all can be seen the figure of ultracapacitor.
In ultracapacitor, the electrode of electrostatic double layer energy storage principle is generally carbon electrode.The porous active Carbon Materials of high-specific surface area becomes the first-selected electrode materials of high-performance electric chemistry electrical condenser.Gac has been realized commercialization as the ultracapacitor of electrode materials at present, is widely applied at numerous areas.
China is wool textile industry big producing country, and cashmere resources is abundant, is that maximum in the world sheep is raised state, and second largest woool production state is again maximum wool importer simultaneously.At present people are that to utilize mode be mainly physics, machinery and simple chemical means to cashmere, and its added value is not high.Cashmere carbon containing, can also be used to make absorbent charcoal material in fact.Application number be 201110106698.1 patent documentation disclosed be a kind of method of utilizing waste wool to prepare gac, he utilizes ZnCl
2, K
2cO
3deng being activator, the specific surface area of the porous activated carbon of preparing is up to 426m
2g
-1.But this technical scheme is only the angle being utilized from raw material, prepare common porous activated carbon specific surface area too low, cannot meet the requirement of ultracapacitor to porous carbon electrode high-specific surface area.
The special mechanics of biological tissue of cashmere is the important prerequisite of preparing porous carbon material for supercapacitor, is different from the raw material of preparing ultracapacitor porous charcoal that other patent is used.Up to now, also do not prepare pertinent literature and the patent report of porous carbon material for supercapacitor taking cashmere as raw material.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides and a kind ofly prepare the method with the porous carbon material for supercapacitor that enriches micro/meso porous hierarchical porous structure and high-specific surface area taking wide material sources and cashmere with low cost as raw material.
The present invention is a kind of utilizes cashmere to prepare the method for porous carbon material for supercapacitor for raw material, and concrete steps are as follows:
(1) wool is processed into after cashmere through a point comb, removes surperficial impurity with deionized water rinsing, clean post-drying;
(2) dried cashmere material is put into tube furnace, in rare gas element, with speed, 1～10 DEG C/min is warmed up to pre-carbonization temperature, at this temperature, is incubated 2h, obtains carbon precursor;
Described rare gas element is one or more in nitrogen, argon gas, helium; Described pre-carbonization temperature is 350～450 DEG C;
(3) carbon precursor step (2) being obtained grinds, and evenly mix by a certain percentage with alkali metal hydroxide, then be placed in rare gas element, with speed, 1～10 DEG C/min is warmed up to activation temperature, and be incubated 1～10h, under this activation temperature, carbon precursor is activated, obtain activation products;
Described carbon precursor evenly mixes 1:2～5 in mass ratio with alkali metal hydroxide; Described alkali metal hydroxide is the mixture of the one or both in potassium hydroxide, sodium hydroxide; Described rare gas element is one or more in nitrogen, argon gas, helium; Described activation temperature is 700～900 DEG C;
(4) acid neutralization for the activation products that step (3) obtained, and extremely neutral, dry by washed with de-ionized water; After grinding, obtain target product: porous carbon material for supercapacitor;
Described acid is one or more in hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid.
As one optimization, in described step (2), pre-carbonization temperature is 400 DEG C, and rare gas element is nitrogen; In described step (3), carbon precursor and alkali metal hydroxide in mass ratio 1:3 fully mix, and activation temperature is 800 DEG C, and soak time is 2h, and alkali metal hydroxide is potassium hydroxide, and rare gas element is nitrogen; In described step (4), acid is hydrochloric acid.
Compared with prior art, the present invention has following technique effect:
(1) utilize a kind of brand-new biomaterial to prepare porous carbon material for supercapacitor, raw material sources are extensive and with low cost, are conducive to industrialized realization;
(2) the concrete special mechanics of biological tissue of cashmere is the important prerequisite of preparing porous carbon material for supercapacitor, is that activator forms the basis of enriching micro/meso porous hierarchical porous structure and high-ratio surface area in charcoal forerunner;
(3) porous carbon material for supercapacitor that prepared by the present invention have abundant micro-/Jie's multi-stage artery structure and high-specific surface area (1358m
2g
-1), large by its prepared porous carbon electrode specific storage, power characteristic is good and good cycling stability; Experiment showed, that prepared porous carbon material is in 6M KOH aqueous electrolyte, its specific discharge capacity is 267F g
-1, and with 1M (C
2h
5)
4nBF
4/ Propylene carbonate solution is electrolytic solution, and the porous carbon material of preparing is that the symmetrical electrical condenser of button that electrode assembling becomes has high-energy-density density, specific power characteristic and good cyclical stability.
Brief description of the drawings
Fig. 1 is the Ar adsorption desorption hysteresis loop figure of prepared porous carbon material in the embodiment of the present invention 1;
From figure, Ar adsorption desorption hysteresis loop shape can be found out, has abundant mesoporous and micropore canals structure with the prepared porous carbon material of egg white.Can calculate its specific surface area by this figure is 1358m
2g
-1.
Fig. 2 is the pore size distribution curve figure of prepared porous carbon material in the embodiment of the present invention 1;
As can be seen from this figure, the main aperture of prepared porous carbon material is mainly distributed between 0.5-4.0nm.
Fig. 3 is the specific storage graphic representation of prepared porous carbon material under different current densities in the embodiment of the present invention 1;
As can be seen from this figure, prepared porous carbon material is in the electrolytic solution of 6M KOH, at 0.5A g
-1current density under, it is 267F g than electric capacity
-1, when current density is brought up to 10A g
-1time, its quality still can remain on 158F g than electric capacity
-1.
Fig. 4 is the Ragone graphic representation based on the symmetrical ultracapacitor of prepared porous carbon material in the embodiment of the present invention 1;
As can be seen from this figure, with 1M (C
2h
5)
4nBF
4/ Propylene carbonate solution is electrolytic solution, and the porous carbon material making is that electrode assembling becomes the symmetrical electrical condenser of button, and its specific energy and specific power density can reach respectively 18Wh kg
-1with 6250W kg
-1.
Fig. 5 is the cycle life graphic representation based on the symmetrical ultracapacitor of prepared porous carbon material in the embodiment of the present invention 1;
As can be seen from this figure, with 1M (C
2h
5)
4nBF
4/ Propylene carbonate solution is electrolytic solution, and the porous carbon material making is that the symmetrical electrical condenser of the button of electrode assembling one-tenth is at 1A g
-1current density under, after 5000 times charge and discharge continuously, its specific discharge capacity decays approximately 9%.
Embodiment
The following examples will be further described the present invention, but not thereby limiting the invention.
Embodiment 1
Collect the wool that Ordos, inner Mongolia produces, after a point comb is processed, obtain cashmere, with deionized water rinsing, by clean after cashmere in 60 DEG C of oven dry of vacuum drying oven, be placed in silica tube, in the tube furnace that is connected with nitrogen, be warmed up to 400 DEG C with the temperature rise rate of 5 DEG C/min, and be incubated 2h.Then the cashmere charcoal above-mentioned pre-charing being obtained and activator in mass ratio 1:3 fully mix, and activator is potassium hydroxide, then, under nitrogen atmosphere, be warmed up to 800 DEG C activate with the temperature rise rate of 5 DEG C/min, and soak time is 2h.By 0.1M dilute hydrochloric acid washing for above-mentioned activation products, then by washed with de-ionized water to neutrality, be dried, obtain porous carbon material.Can find out from Fig. 1 and 2, prepared porous charcoal has abundant micro/meso porous hierarchical porous structure and high specific surface area (1358m
2g
-1).
Get the prepared porous charcoal of 5mg, in active substance: the ratio of acetylene black: tetrafluoroethylene=5:2:1 is evenly mixed, pressure with 20MPa is pressed onto mixture on nickel foam current collector, makes electrode of super capacitor, in 6M KOH electrolytic solution, carries out electro-chemical test.Wherein, foam nickel electrode sheet is working electrode, and saturated calomel electrode is reference electrode, and platinum plate electrode is to electrode.As shown in Figure 3, prepared porous carbon material is at 0.5A g
-1current density under, it is 267F g than electric capacity
-1, when current density is brought up to 10A g
-1time, its quality still can remain on 158F g than electric capacity
-1, illustrate that this porous carbon electrode has good high rate performance.
The porous carbon material making and conductive agent acetylene black and binding agent polyvinylidene difluoride (PVDF) are dispersed in nitrogen methyl-2-pyrrolidone according to mass ratio 80:10:10, fully stir and make to mix.The slurry obtaining is evenly applied in metal collector, and Al paper tinsel is as plus plate current-collecting body, and Cu paper tinsel is as negative current collector.In the vacuum drying oven of 120 DEG C after dry 24h, transfer to and in the glove box that is full of argon gas, be assembled into the symmetrical electrical condenser of button.This symmetry electrical condenser is with 1M (C
2h
5)
4nBF
4/ Propylene carbonate solution is electrolytic solution, taking polypropylene diaphragm as barrier film.Fig. 4 is the Ragone curve of the symmetrical electrochemical capacitor of this button.As can be seen from the figure, the specific energy of this electrical condenser and specific power density can reach respectively 18Wh kg
-1with 6250W kg
-1.Fig. 5 is the cycle life curve of the symmetrical electrical condenser of button.As can be seen from the figure, at 1A g
-1current density under, after 5000 times charge and discharge continuously, the decay of its specific discharge capacity is about 9%, demonstrates its good electrochemical stability.
Embodiment 2
Collect the wool that Ordos, inner Mongolia produces, after a point comb is processed, obtain cashmere, with deionized water rinsing, by clean after cashmere in 60 DEG C of oven dry of vacuum drying oven, be placed in silica tube, in the tube furnace that is connected with argon gas, be warmed up to 350 DEG C with the temperature rise rate of 1 DEG C/min, and be incubated 2h.Then the cashmere charcoal above-mentioned pre-charing being obtained and activator in mass ratio 1:2 fully mix, and activator is potassium hydroxide, then, under argon gas atmosphere, be warmed up to 700 DEG C activate with the temperature rise rate of 1 DEG C/min, and soak time is 2h.By 0.1M dilute sulphuric acid washing for above-mentioned activation products, then by washed with de-ionized water to neutrality, be dried, obtain porous carbon material.
The electrochemical test method of porous carbon material is identical with embodiment 1.
Embodiment 3
Collect the wool that Ordos, inner Mongolia produces, after a point comb is processed, obtain cashmere, with deionized water rinsing, by clean after cashmere in 60 DEG C of oven dry of vacuum drying oven, be placed in silica tube, in the tube furnace that is connected with argon gas, be warmed up to 450 DEG C with the temperature rise rate of 3 DEG C/min, and be incubated 2h.Then the cashmere charcoal above-mentioned pre-charing being obtained and activator in mass ratio 1:4 fully mix, and activator is sodium hydroxide, then, under argon gas atmosphere, be warmed up to 900 DEG C activate with the temperature rise rate of 3 DEG C/min, and soak time is 5h.By the rare nitric acid washing of 0.1M for above-mentioned activation products, then by washed with de-ionized water to neutrality, be dried, obtain porous carbon material.
The electrochemical test method of porous carbon material is identical with embodiment 1.
Embodiment 4
Collect the wool that Ordos, inner Mongolia produces, after a point comb is processed, obtain cashmere, with deionized water rinsing, by clean after cashmere in 60 DEG C of oven dry of vacuum drying oven, be placed in silica tube, in the tube furnace that is connected with helium, be warmed up to 450 DEG C with the temperature rise rate of 10 DEG C/min, and be incubated 2h.Then the cashmere charcoal above-mentioned pre-charing being obtained and activator in mass ratio 1:5 fully mix, activator is with potassium hydroxide and sodium hydroxide 1:1 proportioning in mass ratio, then under helium atmosphere, be warmed up to 1000 DEG C activate with the temperature rise rate of 10 DEG C/min, soak time is 10h.By the rare nitric acid washing of 0.1M for above-mentioned activation products, then by washed with de-ionized water to neutrality, be dried, obtain porous carbon material.
The electrochemical test method of porous carbon material is identical with embodiment 1.
Embodiment 5
Collect the wool that Ordos, inner Mongolia produces, after a point comb is processed, obtain cashmere, with deionized water rinsing, by clean after cashmere in 60 DEG C of oven dry of vacuum drying oven, be placed in silica tube, in the tube furnace that is connected with helium, be warmed up to 400 DEG C with the temperature rise rate of 8 DEG C/min, and be incubated 2h.Then the cashmere charcoal above-mentioned pre-charing being obtained and activator in mass ratio 1:4 fully mix, activator is with potassium hydroxide and sodium hydroxide 1:1 proportioning in mass ratio, then under helium atmosphere, be warmed up to 900 DEG C activate with the temperature rise rate of 8 DEG C/min, soak time is 8h.By 0.1M dilute phosphoric acid washing for above-mentioned activation products, then by washed with de-ionized water to neutrality, be dried, obtain porous carbon material.
The electrochemical test method of porous carbon material is identical with embodiment 1.
Claims (2)
1. a method of preparing porous carbon material for supercapacitor taking cashmere as raw material, is characterized in that, described preparation method comprises the steps:
(1) wool is processed into after cashmere through a point comb, removes surperficial impurity with deionized water rinsing, clean post-drying;
(2) dried cashmere material is put into tube furnace, in rare gas element, with speed, 1～10 DEG C/min is warmed up to pre-carbonization temperature, at this temperature, is incubated 2h, obtains carbon precursor;
Described rare gas element is one or more in nitrogen, argon gas, helium; Described pre-carbonization temperature is 350～450 DEG C;
(3) carbon precursor step (2) being obtained grinds, and evenly mix by a certain percentage with alkali metal hydroxide, then be placed in rare gas element, with speed, 1～10 DEG C/min is warmed up to activation temperature, and be incubated 1～10h, under this activation temperature, carbon precursor is activated, obtain activation products;
Described carbon precursor evenly mixes 1:2～5 in mass ratio with alkali metal hydroxide; Described alkali metal hydroxide is the mixture of the one or both in potassium hydroxide, sodium hydroxide; Described rare gas element is one or more in nitrogen, argon gas, helium; Described activation temperature is 700～900 DEG C;
(4) acid neutralization for the activation products that step (3) obtained, and extremely neutral, dry by washed with de-ionized water; After grinding, obtain target product: porous carbon material for supercapacitor;
Described acid is one or more in hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid.
2. a kind of method of preparing porous carbon material for supercapacitor taking cashmere as raw material as claimed in claim 1, is characterized in that, in described step (2), pre-carbonization temperature is 400 DEG C, and rare gas element is nitrogen; In described step (3), carbon precursor and alkali metal hydroxide in mass ratio 1:3 fully mix, and activation temperature is 800 DEG C, and soak time is 2h, and alkali metal hydroxide is potassium hydroxide, and rare gas element is nitrogen; In described step (4), acid is hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261771.6A CN104003371A (en) | 2014-06-11 | 2014-06-11 | Method for preparing porous carbon material used for super capacitor through using cashmere wool as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261771.6A CN104003371A (en) | 2014-06-11 | 2014-06-11 | Method for preparing porous carbon material used for super capacitor through using cashmere wool as raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104003371A true CN104003371A (en) | 2014-08-27 |
Family
ID=51364316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410261771.6A Pending CN104003371A (en) | 2014-06-11 | 2014-06-11 | Method for preparing porous carbon material used for super capacitor through using cashmere wool as raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104003371A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152170A (en) * | 2015-10-13 | 2015-12-16 | 东南大学 | Preparation method for cicada slough based porous carbon material used for electrochemical capacitor |
| CN105502389A (en) * | 2015-12-21 | 2016-04-20 | 哈尔滨工业大学 | Method for preparing activated carbon material for supercapacitor electrode from calyx seu fructus physalis persistent calyxes |
| CN105883804A (en) * | 2016-04-18 | 2016-08-24 | 江苏大学 | Preparation method of porous carbon nanomaterial for adsorbing methylene blue |
| CN105931860A (en) * | 2016-04-27 | 2016-09-07 | 大连理工大学 | Method for preparing graphene-based multilayer porous carbon material by utilizing ionothermal method |
| CN106832866A (en) * | 2016-12-11 | 2017-06-13 | 戴琪 | A kind of method that utilization wool fiber prepares absorbing material |
| CN108400363A (en) * | 2018-03-09 | 2018-08-14 | 中国科学技术大学 | A kind of electrode material and its preparation method and application |
| CN109671573A (en) * | 2018-12-28 | 2019-04-23 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of preparation method of super capacitor material and products thereof and application |
| CN110577220A (en) * | 2019-10-16 | 2019-12-17 | 中原工学院 | Preparation method and application of nitrogen-containing porous carbon based on waste goat wool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161485A (en) * | 2011-04-27 | 2011-08-24 | 武汉纺织大学 | Method for preparing activated carbon by using waste wool |
-
2014
- 2014-06-11 CN CN201410261771.6A patent/CN104003371A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161485A (en) * | 2011-04-27 | 2011-08-24 | 武汉纺织大学 | Method for preparing activated carbon by using waste wool |
Non-Patent Citations (1)
| Title |
|---|
| 牛耀岚等: "KOH 活化废弃麻制备活性炭及其结构表征", 《高等学校化学学报》, vol. 31, no. 10, 31 October 2010 (2010-10-31), pages 1 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152170A (en) * | 2015-10-13 | 2015-12-16 | 东南大学 | Preparation method for cicada slough based porous carbon material used for electrochemical capacitor |
| CN105502389A (en) * | 2015-12-21 | 2016-04-20 | 哈尔滨工业大学 | Method for preparing activated carbon material for supercapacitor electrode from calyx seu fructus physalis persistent calyxes |
| CN105883804A (en) * | 2016-04-18 | 2016-08-24 | 江苏大学 | Preparation method of porous carbon nanomaterial for adsorbing methylene blue |
| CN105931860A (en) * | 2016-04-27 | 2016-09-07 | 大连理工大学 | Method for preparing graphene-based multilayer porous carbon material by utilizing ionothermal method |
| CN106832866A (en) * | 2016-12-11 | 2017-06-13 | 戴琪 | A kind of method that utilization wool fiber prepares absorbing material |
| CN106832866B (en) * | 2016-12-11 | 2019-02-26 | 河北伟成毛毡有限公司 | A method of absorbing material is prepared using wool fiber |
| CN108400363A (en) * | 2018-03-09 | 2018-08-14 | 中国科学技术大学 | A kind of electrode material and its preparation method and application |
| CN109671573A (en) * | 2018-12-28 | 2019-04-23 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of preparation method of super capacitor material and products thereof and application |
| CN110577220A (en) * | 2019-10-16 | 2019-12-17 | 中原工学院 | Preparation method and application of nitrogen-containing porous carbon based on waste goat wool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104003371A (en) | Method for preparing porous carbon material used for super capacitor through using cashmere wool as raw material | |
| CN103979530A (en) | Method for preparing porous carbon for electrochemical capacitor from egg white used as raw material | |
| CN102923698B (en) | Preparation method for three-dimensional porous graphene for supercapacitor | |
| CN108529587B (en) | Preparation method and application of phosphorus-doped biomass graded porous carbon material | |
| CN104817082A (en) | Method for preparing nitrogen-enriched porous carbon material for supercapacitor by taking lignite as raw material | |
| Guo et al. | N, P, S co-doped biomass-derived hierarchical porous carbon through simple phosphoric acid-assisted activation for high-performance electrochemical energy storage | |
| CN105390672A (en) | Preparation method for three-dimensional nitrogen-doped mesoporous carbon ultra-thin nanosheet material | |
| CN110330016A (en) | An a kind of step cooperative development method of anthracite-base porous carbon graphite microcrystal and hole | |
| CN109713269B (en) | Preparation method of polyene/S composite positive electrode material for lithium-sulfur battery | |
| CN103594254A (en) | Method for preparing manganese dioxide/mesoporous carbon nanometer graded composite electrode material | |
| CN104715936B (en) | A kind of classifying porous carbon electrode material and preparation method for ultracapacitor | |
| CN105152170A (en) | Preparation method for cicada slough based porous carbon material used for electrochemical capacitor | |
| CN107275640B (en) | One step prepares the double-doped cotton base porous carbon of sulphur nitrogen | |
| CN104627976A (en) | Preparation method of meso-porous carbon aerogel with high specific surface area | |
| CN104071768A (en) | Partially graphitized porous carbon electrode material with pore diameter grading distribution and preparing method thereof | |
| CN108584944A (en) | A kind of preparation method of the ultracapacitor rich nitrogen grading porous carbon electrode material of high-specific surface area | |
| Tang et al. | Enhancement in electrochemical performance of nitrogen-doped hierarchical porous carbon-based supercapacitor by optimizing activation temperature | |
| CN112357921B (en) | Hierarchical porous carbon, and preparation method and application thereof | |
| CN105645410A (en) | 3D network pore structure super-capacitor carbon and preparation method thereof | |
| CN108715447A (en) | A kind of camphor tree Quito mesoporous activated carbon and preparation method thereof and the application in electrochemical energy storage | |
| CN105280393A (en) | Amorphous carbon material for nano tunnel and preparation method thereof | |
| CN105140052A (en) | Super-capacitor carbon electrode material preparation method based on taxodiaceae plant cones | |
| CN103545491A (en) | Preparation method of graphene/titanium dioxide composite material for lithium ion battery cathode material | |
| CN105036130A (en) | Method for preparing activated carbon materials for super capacitor by using elm seeds as raw materials | |
| Xiao et al. | Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors with high energy density |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140827 |