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Spherical graphite Application
Spherical graphite material has good electrical conductivity, high crystallinity, low cost, high theoretical lithium insertion capacity, low charge, and discharge potential, and flatness. It is an important part of lithium-ion battery negative electrode material and is used as a negative electrode for lithium-ion battery production at home and abroad. Material replacement products. It has excellent electrical conductivity and chemical stability, high charge and discharge capacity, long cycle life, and environmental protection.
Spherical graphite Preparation
In the process of spherical graphite processing, the graphite dry concentrate is firstly crushed, trimmed, and magnetically separated in the spherical graphite workshop to form the initial product spherical graphite, and then it enters the purification workshop to become spherical graphite (high purity) after high-temperature purification.
Application of spherical graphite in the battery industry
As the world transforms to a clean energy base across electric vehicles (motor vehicles, passenger and heavy transport) and home energy storage, the global demand for cost-effective energy storage solutions continues to drive the growth of the graphite flake market.
Spherical graphite is a crucial ingredient to the efficient operation of lithium-ion batteries (LiB). Spherical graphite is the key component of the anode of a LiB which without, the LiB would not function.
Historically Spherical Graphite has been derived from synthetic graphite, a significantly more costly option when compared against natural flake graphite.
Typically, flake graphite is shaped into a rounded, spherical shape by a mechanical attrition process. The rounded shape of Spherical Graphite allows for more efficient packaging of particles in a LiB anode, which increases the energy and recharge capacity of the LiB.
LiB requires different Spherical Graphite sizes as the Spherical Graphite particle size impacts the performance targets of the LiB. i.e. a small Spherical Graphite particle, d50 of 10 microns, would be used in a LiB that has faster-charging requirements, while a LiB battery that had large power requirements would use a larger Spherical Graphite particle with d50 of 20 microns.
The spheroid graphite is then purified to remove deleterious elements including SiO2, Fe, S, and other metal elements. Various purification techniques are used. These include aggressive acid purification with hydrofluoric acid and thermal purification, using high-temperature furnaces. Both these methods have their advantages and disadvantages.
After purification, the Purified Spherical Graphite is coated to assist with improving the surface and area of the particles. Many LiB manufacturers used their own proprietary technology for coating.
The coated, purified Spherical Graphite is then packed into the shape of the anode required for the LiB batteries.
Test work to date has confirmed that Spherical Graphite is ideally suitable for Lithium-Ion Battery (LiB) applications.
(aka. Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years’ experience in providing super high-quality chemicals and Nanomaterials. The Spherical Graphite produced by our company has high purity, fine particle size, and impurity content. Please contact us if necessary.