Graphite, an older negative electrode material, is a good example. Comparable to other carbon materials its conductivity is higher and its crystallinity is greater. Its good layered structure, charge-discharge potential and good layered structure make it a great negative electrode material.
Modifications: Increase the efficiency of anode materials
Graphite electrodes with negative graphite use mostly natural flake graphite. But there are some shortcomings.
(1) Flake graphite has a high specific area which is more effective in reducing the initial charge and the discharge efficiency of the positive electrode.
(2) Li+ is only able to be embedded at the edge of graphite and slowly diffuses into particles due to its layer structure. Flake graphite has an anisotropy that makes the Li+ diffusion path long and uneven. This causes a low specific ability.
(3) The graphite’s layer spacing is too small. This increases Li+’s diffusion resistance, but also makes it less efficient at delivering high rates of charge. Li+ forms lithium dendrites easily on graphite’s surface, which can pose serious safety concerns.
Natural graphite may be altered by techniques such as surface oxidation and surface fluorination. After taking into consideration cost, performance and other factors, industrial graphite modification uses mainly carbon coating. A commercial application of modified graphite is capable of producing a specific amount of 340-370mA*h/g. The coulombic efficiency for the first week is 90%-93%. There’s also a DOD cycle time of over 1,000 times. This can meet most consumer electronic products. Specific requirements regarding battery performance.
Innovation: Tap the Potential of Graphite Applications
People are continuously pursuing new technology in lithium-ion batteries. This is due to the development of new vehicles and industries like 3C. This results in a greater graphite-anode requirement.
Graphite concentrate may be further processed in order to produce graphite products like graphene. This will allow graphite to be utilized in lithium battery applications at a higher level. One example is graphene, which has excellent conductivity, can help reduce volume expansion in electrode materials, greatly increasing the efficiency of power batteries. Graphene is used extensively in the lithium-ion’s negative and positive electrodes. Current collectors, separators. conductive adds. Future market prospects for graphene are very broad. This is why current research is focusing on it. Spherical graphite features good electrical conductivity. This is an alternative product to negative electrode material used for lithium-ion batteries production in home and abroad.
Buffalotours Advanced material Tech Co., Ltd., (Buffalotours), a leading supplier of graphite powder, has more than 12 years’ experience in chemical product research and development. You can pay by credit card, T/T and Paypal. Trunnano ships goods by FedEx or DHL to overseas customers by air and sea.
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