What applications are graphene materials in lithium electricity?
What are features of Lithium Ion Batteries?
Lithium-ion batteries have the characteristics of high energy density, large reversible capacity, large open circuit voltage, and long service life. In the process of research on lithium-ion battery electrode materials, some allotropes and mixtures of carbon elements can be used as stable materials with excellent electrical conductivity, and are often used in the development of new lithium-ion battery anode materials.
What is the overview of graphene?
Graphene is a planar two-dimensional nanomaterial composed of carbon atoms in a hexagonal honeycomb lattice. Its CC bond length is 0.141nm, its theoretical density is about 0.77mg/m2, and its thickness is only the diameter of one carbon atom. . Carbon atoms participate in the hybridization in the form of sp2, and electrons can be conducted smoothly between layers, so graphene has excellent conductivity and is currently known as the material with the smallest resistivity, which is also the reason why graphene has a broad development prospect in batteries.
What are the applications of graphene materials in lithium electricity?
Application of graphene in cathode materials
For lithium-ion batteries, the applicable cathode materials should meet the characteristics of large reversible capacity, high and stable potential, non-toxic, and low production cost. At present, the more common cathode materials of lithium-ion batteries are mostly lithium iron phosphate materials, but LiFePO4 has poor electrical conductivity and low lithium ion mobility. If the LiFePO4 material is compounded with graphene, its electrical conductivity can theoretically be improved and the rate performance can be improved.
Application of graphene in anode materials
Lithium-ion battery anode materials should meet the conditions of low and stable redox potential, large reversible capacity, dense and stable SEI film formation, non-toxic to the environment, and low production cost. Compared with cathode materials, the application of graphene in anode materials is more extensive and in-depth.
Graphene is directly used as anode material
Graphene has good electrical conductivity, but the easy stacking of its two-dimensional microstructure leads to unsatisfactory research on graphene independent electrode materials. It is mainly manifested in the poor rate performance and low cycle efficiency of the battery. The reversible specific capacity of graphene prepared by Honma et al. can reach 540mAh/g in the first cycle (current density of 50mA/g), but the reversible specific capacity decreases rapidly after multiple cycles. The g current density can reach a high reversible specific capacity (1264mAh/g) in the first cycle, and can still maintain a high reversible specific capacity after 40 cycles.
High quality lithium ion battery manufacturer
Luoyang Moon & Star New Energy Technology Co., LTD, founded on October 17, 2008, is a high-tech enterprise committed to the research and development, production, processing, sales 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
