Lithium battery formation involves charging lithium batteries once after production. This is used to activate the battery. Its function is similar to "formatting" a floppy disk. Once training is completed, the battery can begin charging and discharging normally. The principle is to charge the battery for the first time to activate the active materials in the battery and form a dense film on the surface of the anode to protect the entire chemical interface.
Main materials for lithium batteries
Carbon anode materials
The anode materials actually used in lithium-ion batteries are mainly carbon materials, such as artificial graphite and natural graphite. stone, mesophase carbon microspheres, petroleum coke, carbon fiber, pyrolyzed carbon resin, etc.
Tin-based negative electrode materials
MatsTin-based negative electrode materials can be divided into two types: tin oxide and tin-based composite oxide. Oxides refer to oxides of metallic tin in various valence states. There are no commercial products.
Nitride
There is no commercial product.
Is the negative electrode of the lithium-ion battery harmful to humans?
The lithium battery is a “lithium-ion battery” (battery lithium-ion, LIB abbreviated lithium); polymer battery, The vast majority are “lithium-ion polymer batteries” (lithium-ion polymer batteries, called LPB).
LIB and LPB use similar chemical materials and electrochemical properties. The main difference is that certain colloidal substances are used to help the battery plate adapt or absorb the electrolyte, thereby reducing the amount of liquid electrolyte used. Battery packaging littlet change from a metal shell to aluminum foil packaging.
Electrode materials and battery structure
1. Cathode materials
(1) Lithium cathode materials: mainly LiCoO2, LiNiO2 and LiMnO2.
(2) Polymeric cathode materials: mainly heterocyclic polymers such as polypyrrole (Ppy), polythiophene (PTh) and their derivatives.
2. Negative electrode materials
(1) Carbon materials: mainly natural graphite, coke and carbon fiber, etc. At present, more advanced negative electrode layered graphite particles have adopted nanocarbon. .
(2) Tin oxide negative electrode material: use a mixture of SnO, SiO2 and a small amount of Al2O3, B2O3, P2O3, etc., and heat it gradually up to 1000°C or slightly higher temperature for 12 hours in an argon atmosphere. Mixed oxides containingdivalent tin can be produced.
3. Structure of the positive electrode
LiCoO2 (lithium cobalt oxide) + conductive agent (acetylene black) + adhesive (PVDF) + current collector (foil aluminum or aluminum strip) positive electrode< /p>
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4. Negative electrode structure
Graphite + conductive agent (acetylene black) + thickener ( CMC) + binder (SBR) + current collector (copper foil or nickel strip) negative electrode The actual ingredients and production process are quite detailed and complex.
Materials for negative electrodes of lithium-ion batteries; the first is a carbon negative electrode material: it was actually used as a negative electrode. lithium-ion battery material It is mainly carbon materials, such as artificial graphite, natural graphite, mesophase carbon microspheres, pet cokeole, carbon fiber, pyrolytic resin carbon, etc. The second type is tin-based negative electrode materials: Tin-based negative electrode materials can be divided into two types: tin oxide and tin tin-based composite oxide. Oxides refer to oxides of metallic tin in various valence states. There are currently no commercial products. The third type is lithium-containing transition metal nitride anode materials, which currently have no commercial products. The fourth type isalloy negative electrode materials: including tin-based alloys, silicon-based alloys, germanium-based alloys, aluminum-based alloys, alloys antimony-based, magnesium-based alloys and other alloys. There are currently no commercial products. The fifthThis type concerns negative electrode materials at the nanoscale: carbon nanotubes and nanoalloy materials. The sixth type of nanomaterial is nanooxide: at present, Hefei Xiangzheng Chemical Technology Co., Ltd. According to the latest market development trends of lithium battery new energy industry in 2009, many companies began to use nanoscale titanium oxide and nanoscale silicon. The oxide to be added to the previous traditional graphite, tin oxide and carbon nanotubes significantly improves the charge and discharge capacity and the number of charge and discharge times of lithium batteries.
Therefore, it is harmless if you do not come into regular contact with it.