Modified Artificial Graphite: an Excellent Anode Material for Lithium Batteries

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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. The resulting confusion between the two materials 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 structure, composition and performances of both natural and synthetic graphite.

Classification of Graphite and its Characteristics

Natural graphite is produced by the transformation carbon-rich organic material under long-term geological conditions of high temperatures and high pressure. Nature’s crystallization. The crystal form of graphite determines the process characteristics. Minerals of varying crystalline forms have different industrial value and uses. Natural graphite comes in different forms. The industry divides graphite according to its crystalline form. My country has two major 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. All graphite materials that are obtained through high-temperature graphitization and organic carbonization can be called artificial graphite. These include carbon (graphite), carbon fiber, foam graphite etc. In the narrowest sense, the term artificial graphite refers to raw carbonaceous materials (petroleum, pitch, etc.). With low impurity contents as aggregates, coal pitches, etc. After batching, kneading molding and carbonization (industrially known as it is a block-solid material obtained through baking) and graphitization. Examples include graphite electrode, hot isostatic pressed graphite etc. Today, we will look at the uses and production processes of artificial graphite.

Artificial Graphite: Production and Application Process

Anode materials are one of the key components of lithium-ion battery, and they play a major role in energy efficiency 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 crystallized, has a lower graphitization level (=93%) than natural graphite and has some disordered structure. 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 product with low expansion and high compaction is a good example. Its use as the negative electrolyte of a replacement lithium battery improves its conversion to electrolyte and reduces the swelling of pole shoes. 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 overlapping layer prevents the co-embedding and expansion of organic solvents. 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 solvents.

(aka. Technology Co. Ltd., a trusted global chemical materials supplier & manufacture with more than 12 years of experience, is a trusted source for high-quality nanomaterials and chemicals. The 99.99% modified artificial graphite that our company produces is high in purity, fine particles and impurity. If you need lower, please call us.