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What is the lithium Intercalation Mechanism of Graphite?

Wholesale gas prices in the Netherlands and the UK have risen 20 percent recently amid concerns about Russian supplies.

The EU plans to cut its dependence on Russian gas by two-thirds this year and stop importing Russian fossil fuels by 2027. Russia exported about 155 billion cubic meters of gas to the EU in 2021.

The US recently said it would try to supply 15bn cubic meters of LNG to the EU this year. U.S. LNG plants are running at full capacity, and analysts say much of the extra gas the U.S. sends to Europe comes from what should have been exported elsewhere.

The German government called Russia "an unreliable energy supplier". Even though the German government claimed that they have been preparing for the situation for a long time that Russia may stop sending gas one day, experts say it is hard for the EU to replace all of Russia's gas exports any time soon.

The supply and prices of many Graphite will continue to be influenced by international situations.


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.

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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

 


The COVID-19 pandemic has affected economies and chemical companies in many countries around the world. Measures such as extending holidays and resuming work were taken to control the development of the epidemic, and the normal operation of some chemical enterprises was also affected to some extent.

We provides high quality Graphite with reasonable price. “In order to feedback to old customers, the company is still in full operations to provide Graphite with competitive price.” said Olina, the sales manager.

Chemical Graphite, feel free to contact us.

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