The following content is sponsored by Northern Graphite
Graphite: An Essential Material in the Battery Supply Chain
The demand for lithium-ion (Li-ion) batteries has skyrocketed in recent years due to the increasing popularity of electric vehicles (EVs) and renewable energy storage systems.
What many people don’t realize, however, is that the key component of these batteries is not just lithium, but also graphite.
Graphite represents almost 50% of the materials needed for batteries by weight, regardless of the chemistry. In Li-ion batteries specifically, graphite makes up the anode, which is the negative electrode responsible for storing and releasing electrons during the charging and discharging process.
To explore just how essential graphite is in the battery supply chain, this infographic sponsored by Northern Graphite dives into how the anode of a Li-ion battery is made.
What is Graphite?
Graphite is a naturally occurring form of carbon that is used in a wide range of industrial applications, including in synthetic diamonds, EV Li-ion batteries, pencils, lubricants, and semiconductor substrates.
It is stable, high-performing, and reusable. While it comes in many different grades and forms, battery-grade graphite falls into one of two classes: natural or synthetic.
Natural graphite is produced by mining naturally occurring mineral deposits. This method produces only one to two kilograms of CO2 emissions per kilogram of graphite.
Synthetic graphite, on the other hand, is produced by the treatment of petroleum coke and coal tar, producing nearly 5 kg of CO2 per kilogram of graphite along with other harmful emissions such as sulfur oxide and nitrogen oxide.
A Closer Look: How Graphite Turns into a Li-ion Battery Anode
The battery anode production process is composed of four overarching steps. These are:
Mining
Shaping
Purifying
Coating
Each of these stages results in various forms of graphite with different end-uses.
For instance, the micronized graphite that results from the shaping process can be used in plastic additives. On the other hand, only coated spherical purified graphite that went through all four of the above stages can be used in EV Li-ion batteries.
The Graphite Supply Chain
Despite its growing use in the energy transition all around the world, around 70% of the world’s graphite currently comes from China.
With scarce alternatives to be used in batteries, however, achieving supply security in North America is crucial, and it is using more environmentally friendly approaches to graphite processing.
With a lower environmental footprint and lower production costs, natural graphite serves as the anode material for a greener future.
Click here to learn more about how Northern Graphite plans to build the largest Battery Anode Material (BAM) plant in North America.
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