Products

  • 0
  • 0

What is the lithium Intercalation Mechanism of Graphite?

US President recently decided to invoke a Cold War-era defense law to encourage domestic Graphite.

Graphite has good conductivity, high crystallinity, and a well-layered structure. It is very suitable for repeated intercalation and deintercalation of lithium ions. It is currently the most widely used and most mature negative electrode material. After lithium ions are intercalated between the graphite layers, a lithium intercalation compound LixC6 (0≤x≤1) is formed, and the theoretical capacity can reach 372mAh/g (x=1). The reaction formula is: xLi++6C+xe-→LixC6

Lithium-ion intercalation changes the stacking mode between graphite layers from ABAB to AAAA.

1650862983401098.jpg

Graphite modification treatment

Since the graphite interlayer spacing (d≤0.34nm) is smaller than the crystal plane interlayer spacing (0.37nm) of the graphite lithium intercalation compound LixC6, the graphite layer spacing changes during the charging and discharging process, which is easy to cause the graphite layer to peel off, pulverize, and also occur. Lithium ions and organic solvent molecules co-intercalate into the graphite layer, and the organic solvent decomposes, affecting the battery cycle performance.

Through graphite modification, such as oxidation on the surface of graphite and coating of polymer pyrolytic carbon, composite graphite with a core-shell structure can be formed, improving the charge and discharge performance of graphite and increasing the specific capacity.

Other anode materials

At present, graphite is the mainstream commercial lithium battery negative electrode material. Its theoretical gram capacity is 372mAh/g. The graphite negative electrode material with better performance on the market can reach 360mAh/g, and the gram capacity gradually tends to the limit value. Although graphite as a negative electrode material has disadvantages such as low gram capacity and cycle deviation, because of the high-cost performance of graphite-based negative electrode materials, it will not be replaced by new materials immediately. The specific reasons are as follows:

1. The new anode material technology is immature, and it will take a long time for performance improvement;

2. The price of new anode materials is higher, and the price advantage of graphite anodes is obvious;

3. The negative electrode material needs to be used in combination with the positive electrode material, electrolyte, etc., and the specific capacity of the current positive electrode material is generally low.

High-quality graphite supplier

Luoyang Moon & Star New Energy Technology Co., LTD, founded on October 17, 2008, is a high-tech enterprise committed to developing, producing, processing, selling, and technical services of lithium-ion battery anode materials. After more than 10 years of development, the company has gradually developed into a diversified product structure with natural graphite, artificial graphite, composite graphite, intermediate phase, and other negative materials (silicon-carbon materials, etc.). The products are widely used in high-end lithium-ion digital power and energy storage batteries. If you are looking for Lithium battery anode material, click on the needed products and send us an inquiry:sales@graphite-corp.com

 


Russia is a major supplier of industrial metals such as nickel, aluminium and palladium. Russia and Ukraine are both major wheat exporters, and Russia and Belarus produce large amounts of potash, an input to fertiliser. The price and market of the Graphite will fluctuate under its influence. Prices of these goods have been rising since 2022 and are now likely to rise further because of the Russia-Ukraine conflict. Russia is a major supplier of industrial metals such as nickel, aluminium and palladium. Russia and Ukraine are both major wheat exporters, and Russia and Belarus produce large amounts of potash, an input to fertiliser. The price and market of the Graphite will fluctuate under its influence. Prices of these goods have been rising since 2022 and are now likely to rise further because of the Russia-Ukraine conflict.

Inquiry us

Our Latest Products

High Purity Tin Sn Powder CAS 7440-31-5,99%

Recently, the Bulgarian Gas Company said that Bulgaria is negotiating with Gazprom on resuming natural gas supply, and there is a possibility that Russia will resume natural gas supply to Bulgaria.Since the outbreak of the conflict between Russia and…

High Purity Nano Ag Silver powder cas 7440-22-4, 99%

The secretary general of the Organization of Petroleum Exporting Countries (OPEC) said recently that US economic sanctions against Venezuela have affected global energy supplies. He told Venezuelan media that the ECONOMIC sanctions imposed by the Uni…

High Purity Tungsten Carbide WC Powder Cas 12070-12-1, 99%

A tanker carrying 650,000 barrels of Venezuelan crude oil is reportedly bound for Europe, the first time Venezuela has exported crude to Europe in the past two years under US sanctions. It is analyzed that the U.S. is making up for the European ener…