Hvorfor liker litiumbatterier å bruke grafittanodematerialer?

(Hvorfor liker litiumbatterier å bruke grafittanodematerialer?)

Hva er litiumionbatteri?

Lithium ion battery refers to a secondary battery system in which two different lithium intercalation compounds that can reversibly intercalate and deintercalate lithium ions are used as the positive electrode and the negative electrode of the battery, hhv. Under lading, lithium ions are deintercalated from the positive electrode, through the electrolyte and separator, and embedded in the negative electrode; during discharge, on the contrary, lithium ions are deintercalated from the negative electrode, through the electrolyte and separator, and embedded in the positive electrode. The negative electrode of the lithium ion battery is made of negative electrode active material, binder and additives mixed to make a paste glue, which is evenly spread on both sides of the copper foil, dried and rolled.

What are the advantages of graphite as a negative electrode material?

Grafitt er en allotrop av karbon, and the two are closely related. Grafitt er den mest stabile formen for karbon. (Diamond is a metastable allotrope of carbon. Although its hardness is much higher than graphite, it is the hardest substance in nature, but its stability is lower than that of graphite.)

Generelt sett, graphite has the advantages of high electronic conductivity, small volume change of layered structure before and after lithium intercalation, high lithium intercalation capacity and low lithium intercalation potential, and has become the mainstream commercial lithium-ion battery negative electrode material.

What is the way of obtaining graphite?

There are two ways to obtain graphite: one is natural ore, and the other is the synthesis of coal tar. The graphite materials used in lithium-ion batteries are generally prepared by blending 55% synthetic graphite and 45% low-purity natural graphite.

Manufacturers once favored synthetic graphite because its uniformity and purity were superior to natural graphite. Now it is not the same, the application of modern chemical purification methods makes it possible to obtain 99.9% pure natural graphite after heat treatment. I kontrast, synthetic graphite is 99% pure, making the former more popular.

Compared with synthetic graphite, purified natural flake graphite has higher crystallinity and exhibits better electrical and thermal conductivity. I tillegg, natural graphite is expected to reduce the production cost of lithium-ion batteries, while achieving equal or better battery performance.

Høykvalitets grafittprodusent

Ingefær måne & Star New Energy Technology Co., LTD, stiftet i oktober 17, 2008, er en høyteknologisk bedrift forpliktet til forskning og utvikling, produksjon, behandling, salg og tekniske tjenester av litium ion batteri anode materialer. Etter mer enn 10 år med utvikling, selskapet har gradvis utviklet seg til en diversifisert produktstruktur med naturlig grafitt, kunstig grafitt, kompositt grafitt, mellomfase og andre negative materialer (silisium karbon materialer, osv.). Produktene er mye brukt i high-end lithium ion digital, strøm- og energilagringsbatterier. Hvis du leter etter anodemateriale til litiumbatteri,klikk på de nødvendige produktene og send oss ​​en forespørsel：sales@graphite-corp.com

(Hvorfor liker litiumbatterier å bruke grafittanodematerialer?)