CN102055013A - Activated carbon layer for chemical battery - Google Patents
Activated carbon layer for chemical battery Download PDFInfo
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- CN102055013A CN102055013A CN2009101933486A CN200910193348A CN102055013A CN 102055013 A CN102055013 A CN 102055013A CN 2009101933486 A CN2009101933486 A CN 2009101933486A CN 200910193348 A CN200910193348 A CN 200910193348A CN 102055013 A CN102055013 A CN 102055013A
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- activated carbon
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- felt
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of battery products, in particular to an activated carbon layer for a chemical battery. The chemical battery comprises a battery body and an activated carbon layer positioned in the battery body, wherein activated carbon in the activated carbon layer is activated carbon felt. The carbon material in the activated carbon layer adopts the activated carbon felt to obtain a larger area and capture more battery ions, so that the electric quantity of the battery can be increased, and the performance of the battery can be improved.
Description
The technical field is as follows:
the invention relates to the technical field of battery products, in particular to an activated carbon layer for a chemical battery.
Background art:
the chemical battery is a device for converting chemical energy of positive and negative active materials into electric energy through electrochemical reaction. Through long-term research and development, chemical batteries come to a situation of various varieties and wide application. For example, alkali manganese batteries, zinc manganese batteries, lithium batteries, zinc batteries, lead acid batteries, nickel cadmium batteries, nickel iron batteries, nickel hydrogen batteries, lithium ion batteries, magnesium batteries, and the like are common. In some chemical batteries, an activated carbon layer is commonly used as the negative electrode. Such as lithium ion batteries, magnesium batteries, water batteries, etc., which have been widely used. For example, the following steps are carried out: the negative electrode material of the lithium ion battery is lithium metal, and the positive electrode material is a carbon material. The anode material of the lithium ion battery is cobalt lithium oxide, and the cathode material is carbon material. The battery realizes the charging and discharging process of the battery through the insertion and extraction of lithium ions generated by the anode in the cathode carbon material.
Generally, a lithium ion battery comprises the following structure:
1. positive electrode structure: liCoO2 (lithium cobaltate), conductive agent (acetylene black), adhesive (PVDF), current collector (aluminum foil)
2. Negative electrode structure: the reaction on the positive electrode of graphite, a conductive agent (acetylene black), a thickening agent (CMC), a binder (SBR), a current collector (copper foil) is as follows:
LiCoO2= charge = Li1-xCoO2+ Xli + + Xe (electron)
The reaction occurring at the negative electrode is
6C+XLi++Xe＝＝＝＝＝LixC6
In the above lithium ion battery, as well as the currently popular environmentally friendly water battery and magnesium battery, a carbon material is used as a negative electrode, and for example, graphite is used in the above lithium ion battery. In these chemical batteries, activated carbon is used as a negative electrode and the activated carbon is used as a nest of ions for trapping ions, electrons, and the like of a positive electrode. Currently, when an activated carbon layer is manufactured, a coating mode is mostly adopted, that is, activated carbon is uniformly coated on a current collector of a negative electrode or a layer of activated carbon layer is formed on the current collector of the negative electrode by a spraying mode. The carbon in the resulting activated carbon layer is thus formed as a stack of particles. The greater the surface area of the activated carbon layer, the greater the current stored. However, the surface area of the activated carbon layer formed by coating or spraying cannot be increased, so that the electric quantity of the battery is limited.
The invention content is as follows:
the technical problem to be solved by the invention is to overcome the defects of the prior art and provide the activated carbon layer for the chemical battery, which has a simple structure and can greatly increase the surface area of the activated carbon layer so as to improve the electric quantity of the battery.
In order to solve the technical problems, the invention adopts the following technical scheme: the chemical battery comprises a battery body and an activated carbon layer positioned in the battery body, wherein activated carbon in the activated carbon layer is activated carbon felt.
The carbon atoms in the activated carbon felt in the activated carbon exist in a disordered stacking mode of graphite-like microcrystals.
The activated carbon layer comprises: the current collector and the activated carbon felt coated on the surface of the current collector.
The battery body is any one of a lithium battery, a lithium ion battery, a magnesium battery and a water battery.
The carbon material in the activated carbon layer adopts the activated carbon felt to obtain a larger area and capture more battery ions, so that the electric quantity of the battery can be increased, and the performance of the battery can be improved.
The specific implementation mode is as follows:
the present invention will be specifically explained below by taking a magnesium battery as an example. The embodiment comprises the following steps: a cathode, a separator paper, an activated carbon layer, and an anode.
Wherein, the cathode is: the magnesium alloy plate or the cast magnesium alloy plate is adopted for manufacturing.
The isolation paper is used for preventing the direct contact of the positive and negative active materials from causing the internal short circuit of the battery. The release paper is made of paper release material, which has the following advantages:
1. has good chemical stability and certain mechanical strength in the electrolyte, and can bear the oxidation-reduction action of the electrode active material.
2. The ability of the ions to pass through the separator paper is greater, i.e., the separator paper has less resistance to the movement of electrolyte ions. Thus, the internal resistance of the battery is correspondingly reduced, and the energy loss of the battery during discharging is reduced.
3. The separator paper is a good insulator for electrons and is inexpensive.
The carbon material of the activated carbon layer adopts activated carbon felt.
Anode: is made of copper plate or foam copper.
The cathode, the isolating paper, the activated carbon layer and the anode are sequentially overlapped and encapsulated in a shell, and the shell is filled with electrolyte.
In this embodiment, in order to increase the surface area, the activated carbon layer is an activated carbon felt, that is, "felt hairs" are formed on the surface of the activated carbon layer, so that the surface area of the activated carbon layer can be increased, and more magnesium ions can be trapped. Specifically, the activated carbon felt is produced by taking organic polymer or asphalt as a raw material, and has low ash content. The main element is carbon. The carbon atoms exist in the activated carbon felt in a disordered stacking mode of graphite-like microcrystals, the unit space ordering is poor, the activated carbon felt is generated in pores after being activated, more than 90 percent of the activated carbon felt is micropores, and the microstructure of the activated carbon fiber is formed. Such a microstructured carbon material may provide a large amount of surface area. The surface of the battery is provided with a large number of micropores, so that during the charging and discharging processes of the battery, when activated carbon is adsorbed and desorbed, the ion adsorption path is short, and adsorbed substances can directly enter the micropores.
The activated carbon felt adopted by the invention contains a small amount of hydrogen, oxygen and the like besides carbon elements. Generally the total amount of oxygen-containing groups will not exceed 1.5meq/g.
Because the invention adopts the activated carbon felt, the surface area of the activated carbon felt is 1 to 2 orders of magnitude larger than that of the granular activated carbon which is usually prepared by adopting a coating and spraying mode, and because the micropores of the activated carbon felt are directly arranged on the surface, the activated carbon felt can be directly contacted with the adsorption particles in the battery, the adsorption speed is very high, and the performance of the battery can be greatly improved.
In the above embodiment, the injection amount of water in the housing is: at least the cathode, the isolation paper, the activated carbon layer and the anode are soaked.
The chemical equation of the first embodiment is: mg + H 2 O＝MgO+H 2
Wherein the cathode electrolysis equation is: mg-2e - +2OH - ＝Mg+H 2 O
The anode electrolysis equation is: 2H 2 O+2e - ＝2OH - +H 2
In the first embodiment, the magnesium alloy plate or the cast magnesium alloy plate is used as the cathode, which has better stability, and when in use, a little water is added for soaking, so that direct current of 1.4 volts can be generated. After the water battery is used for a period of time, the magnesium element in the cathode is gradually consumed, and the water battery can be scrapped and recycled after the cathode is completely consumed.
Compared with other chemical batteries of the same type, the chemical battery adopts the activated carbon felt, so that the electric quantity of the chemical battery is higher than that of other chemical batteries of the same type, the performance of the chemical battery is higher, and the charging and discharging speed is higher.
Second embodiment, a lithium ion battery of this embodiment is an embodiment, which is similar to the above embodiment, and the activated carbon layer in the negative electrode also adopts an activated carbon felt, and the activated carbon felt is coated on a current collector made of copper foil to form the negative electrode of the battery. In the same way, the lithium ion battery adopts the activated carbon felt as the carbon material, so that the performance of the battery is greatly improved.
It is to be understood that the above description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and that equivalent changes or modifications in the structure, features and principles of the present invention described in the claims should be included in the claims.
Claims (4)
1. An activated carbon layer for a chemical battery, comprising: battery body and be located the activated carbon layer in the battery body, its characterized in that: the activated carbon in the activated carbon layer is activated carbon felt.
2. An activated carbon layer for chemical batteries according to claim 1, characterized in that carbon atoms in activated carbon felt in said activated carbon are present in the form of turbostratic stacks of graphite-like crystallites.
3. An activated carbon layer for chemical batteries according to claim 2, characterized in that said activated carbon layer comprises: the current collector and the activated carbon felt coated on the surface of the current collector.
4. The activated carbon layer for chemical batteries according to claim 3, wherein the battery body is any one of a lithium battery, a lithium ion battery, a magnesium battery and a water battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101933486A CN102055013A (en) | 2009-10-27 | 2009-10-27 | Activated carbon layer for chemical battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101933486A CN102055013A (en) | 2009-10-27 | 2009-10-27 | Activated carbon layer for chemical battery |
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| CN102055013A true CN102055013A (en) | 2011-05-11 |
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| CN2009101933486A Pending CN102055013A (en) | 2009-10-27 | 2009-10-27 | Activated carbon layer for chemical battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784624A (en) * | 2016-12-16 | 2017-05-31 | 山东精工电子科技有限公司 | A kind of based lithium-ion battery positive plate and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480399A (en) * | 2003-07-18 | 2004-03-10 | 中国科学院山西煤炭化学研究所 | Method for preparing spherical active cardon with base of resin |
| CN101548028A (en) * | 2007-05-15 | 2009-09-30 | 东洋铝株式会社 | Carbon-coated aluminum material, and method for production thereof |
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2009
- 2009-10-27 CN CN2009101933486A patent/CN102055013A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480399A (en) * | 2003-07-18 | 2004-03-10 | 中国科学院山西煤炭化学研究所 | Method for preparing spherical active cardon with base of resin |
| CN101548028A (en) * | 2007-05-15 | 2009-09-30 | 东洋铝株式会社 | Carbon-coated aluminum material, and method for production thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784624A (en) * | 2016-12-16 | 2017-05-31 | 山东精工电子科技有限公司 | A kind of based lithium-ion battery positive plate and preparation method thereof |
| CN106784624B (en) * | 2016-12-16 | 2019-11-05 | 山东精工电子科技有限公司 | A kind of based lithium-ion battery positive plate and preparation method thereof |
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Application publication date: 20110511 |