Yadea lithium batteries are better.
The graphene battery provided by Yadi is a high-end battery product manufactured by Chaowei Battery. If the lithium battery is a Chaowei series product of the same brand, the overall cost of the lithium product. The battery will be higher. It is higher and has better safety performance. Lithium batteries from major brands are always of a higher standard than graphene batteries. They have a longer overall lifespan, a newer weight, and better overall battery life.
Price is undoubtedly the most important factor for many people, and if you value it, lead acid batteries are naturally the first choice. In terms of price, they account for two thirds of graphene batteries and three. Lead-acid batteries currently represent a third of lithium batteries. In reasonn their advantageous price, lead acid batteries are currently the most used batteries in two-wheeled electric vehicles.
The difference between batteries:
1. Lithium Battery:
The lithium battery uses a positive electrode. As a lithium material, the negative is composed of graphite, organic electrolyte and a specially formed polymer film. This is a battery with the characteristics of light weight and high density. It is currently the main battery for electric vehicles. of mid-to-high-end consumer battery market share.
2. Graphene Battery:
Graphene battery is a battery based on a lead acid battery with a special graphene element added. Ordinary batteries have increased characteristics. density and extended lifespan. This is an innovative battery actually promoted by leading brands such as Yadi and Emma.
What are the positive and negative electrode materials of lithium ion batteries?
The negative electrode materials of lithium batteries are generally divided into the following types:
p> The first is carbon. Negative electrode materials:
The negative electrode materials currently used in lithium-ion batteries are mainly carbon materials, such as artificial graphite, natural graphite, mesophase carbon microspheres, petroleum coke, carbon fiber. , and pyrolytic resin, 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-based composite oxide. Oxides refer to oxides of metallic tin in various valence states. HeThere is currently no commercial product.
The third type is lithium-containing transition metal nitride anode materials, which currently have no commercial products.
The fourth type is alloy negative electrode materials:
Including tin-based alloys, silicon-based alloys, germanium-based alloys , aluminum-based alloys, antimony-based alloys, magnesium-based alloys and other alloys, and there are currently no commercial products.
The fifth type is nanoscale negative electrode materials: 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, manys companies began to use nanotitanium oxide and nanoscale oxide materials. Silicon oxide is added to the previous traditional graphite, tin oxide and nanocarbon. Inside the tube, the charge and discharge capacity as well as the number of charge and discharge times of the lithium battery are significantly improved.
What ingredients are used for the positive and negative electrodes of lithium batteries used in solar street lights?
Is it a lithium-ion battery? The negative electrode material of lithium batteries is lithium metal.
The negative electrode materials for lithium-ion batteries on the market are mainly carbon materials, various carbons. The specific content is as follows:
The main negative electrode materials for lithium-ion batteries that have been researched and developed include: graphite, tarn stone, carbon fiber, pyrolytic carbon, carbon black, glassy carbon, etc. Among them, graphite and oil have the greatest application value.
The lithium insertion characteristics of graphite-type carbon materials are: ① The lithium insertion potential is low and flat, which can provide high and stable working voltage for lithium batteries -ion; ② The insertion capacity of lithium is high; , and the theoretical capacity of LiC6 is 372 mAh?g-1③ has poor compatibility with organic solvents and is prone to solvent co-insertion, reducing the insertion performance of lithium.
The characteristics of insertion and delithiation of tar and carbon materials are: ① The initial insertion potential of lithium is high, and the potential curve is asymmetric. Lithium insertion generally starts below 1.1V, and there is no ppotential platform evident during the entire lithium insertion process; ② In the composition of the intercalation compound LixC6, x=0.5, the lithium insertion capacity is related to the heat treatment temperature and surface condition; ; ③ Compatible with solvents Good sexual and circulatory performance.
Physical properties of carbon anode materials
Carbon materials natural graphite artificial graphite petroleum coke pitch coke pyrolytic carbon acetylene ink
Heat treatment 2800 2500 2200 1900 1400 1200< /p>
Temperature∕℃
Crystallinity 229.1 112.1 84.5 3.9 2.5 1.2 1.2
Lc∕nm 47.4 19.3
Lattice constant 0.335 1.336 0.337 0.346 0.347 0.380 0.348
d∕nm 0.339 0.343
Density 2.20 1 .98 2.00 2.13 2.02 1.60 1.31
g?cm-3 1.95 1.97
Specific surface area 6.3 1.5 1.9 9.5 4.3 4.0 31.7
cm2?g-1 2.84.0
The ingredients of the positive and negative electrodes of lithium batteriesium used in solar street lights mainly include the following materials.
Cathode ingredients:
1. Cathode Active Materials: Commonly used cathode active materials include lithium manganate (LiMn2O4), lithium cobalt oxide (LiCoO2), and lithium iron phosphate (LiFePO4). Among them, lithium iron phosphate is currently the most widely used cathode material because of its high safety, good service life and high energy density.
2. Binders: Commonly used binders include polymers, such as polyacrylate (PAA) and polyvinyl ester (PEA). The function of the binder is to bind the positive active material and the conductive agent together to form a solid positive structure.
3. Conductive agent: Commonly used conductive agents include carbon black and conductive polymers. The function of the conducting agentis to improve the conductive performance of the positive electrode and promote the conduction of electrons.
Anode ingredients:
1. Negative active material: The commonly used negative active material is graphite. Graphite has good service life and high energy density, and is currently the most widely used anode material.
2. Binder: Polymer is also used as a binder to bind the negative active material and the conductive agent together.
3. Conductive agent: Commonly used conductive agents include carbon black and conductive polymers. The function of the conductive agent is to improve the conductive performance of the negative electrode and promote the conduction of electrons.
In addition to the above ingredients, lithium batteries also include an electrolyte and a separator. The electrolyte generally consists of lithium salts and organic solvents.ques to ensure the transport of lithium ions. The separator is used to isolate the positive and negative electrodes to prevent short circuits.
In short, the ingredients of positive electrodes of lithium batteries used in solar street lights mainly include positive active materials, binders and conductive agents, and the ingredients of negative electrodes mainly include negative active materials , binders and conductive agents. The selection and combination of these ingredients can be tailored to specific application needs and performance requirements.