Modified Artificial Graphite: an Excellent Anode Material for Lithium Batteries

Byadmin

Aug 24, 2023

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Graphite Graphite can be classified into artificial graphite Graphite or natural graphite. Although both graphite powders have similar properties in terms of physical and chemical structure, their applications are very different. Some researchers have not noticed the differences between the two, and called it graphite as a whole in several studies. This conflation has resulted in many errors of judgment and decision-making, which have led to a waste of resources and financial losses. This article discusses the differences between natural and synthetic graphite in terms of their structure, composition and performance.

Graphite Powder: Classification & Characteristics

Graphite powder is produced by transforming organic carbon under long-term conditions of high temperatures and high pressures in the geological environment. It is nature’s crystallization. The crystal form of graphite determines the process characteristics. Minerals with different crystallographic forms have different industrial value and uses. There are several types of graphite powder. The industry divides graphite according to its crystalline form. My country has two main categories: flake graphite, and cryptocrystalline.

Crystallography uses polycrystals to describe the structure of graphite. Artificial graphite comes in many different forms, each with a unique production process. Artificial graphite is a term that can be used to describe all graphite obtained from organic carbonization, graphitization, and high temperature treatment. Examples include carbon (graphite), carbon fiber (graphite), foam (graphite), etc. Artificial graphite, in its narrowest sense, is the result of using carbonaceous raw material (petroleum, pitch, etc.). With low impurity contents as aggregates, coal pitches, etc. After batching, kneading molding and carbonization (industrially referred to as It is a block-solid material obtained through baking) and graphitization. Examples include graphite electrode, hot isostatic pressed graphite and others. Today, we will look at the uses and production processes of artificial graphite.

Artificial Graphite Production and Application Process

Anodes are one of the key materials used in lithium-ion battery systems. They play a major role in energy and cycle stability. The development of science has led to the emergence of new negative electrodes materials. These materials include graphene and carbon nanotubes. They also come in silicon-based, tinbased, tungstenbased, etc. but their large quantity is limited due to a variety problems. At present, graphite carbon materials dominate the market for anode materials.


Artificial graphite is less crystallin and has a disordered structure compared to natural graphite. It also has a smaller interlayer spacing. Artificial graphite also has a surface that is not smooth and porous. It also has a high specific surface. It decomposes and reacts easily with the electrodelyte. Therefore, its initial efficiency (=350mAh/g), and specific capacity are low.


Researchers improved the production method to overcome the problem of artificial graphite, which is used in lithium-ion batteries. A modified artificial graphite with high compaction, a long cycle time and a low rate of expansion is one such product. Using it as a negative electrode for a replacement lithium battery will improve its conversion to electrolyte and reduce swelling in the pole shoe. The process of production is to replace the artificial graphite by pitch, etc. The carbonization process is to replace the artificial graphite with pitch, etc. A layer of amorphous, carbon-doped material is formed over the artificial graphite. The layer that overlaps can be used to prevent organic solvents from being incorporated into graphite and to prevent its expansion and contracting. The surface layer has been displaced so that the lithium batteries are interrupted. This maintains high capacity and low potential, as well as compatibility with a wide range of solvents.


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