Battery Metals Market
The global demand for electric cars on the rise and the requirement for lithium in long-life batteries is accelerating. The lithium market is about to boom exponentially and the demand for lithium mining production is increasing significantly. Many automakers are forward thinking and going totally to manufacture electric vehicles as soon as 2019.
Conventional engine fossil fuel costs are high and electricity is by far a cheaper and a longer lasting alternative with all the advantages of a clean source of power. Electric cars are mechanically much simpler, with electric motors compared to combustion engines with added benefits of less noise and pollution, and more torque.
Technological advances in batteries is allowing them to hold power for a longer time period allowing cars to have an increasing range and the price of EVs has come down significantly.
The “Big 3” car companies and automakers around the world are ramping up EV production and the battery manufacturers are searching exhaustively for raw materials, particularly lithium.
The Role Lithium Will Play in the Future
The lithium market is under-developed compared to most other industrial commodities, leaving a value space for a select number of companies to find and develop economic lithium deposits. Lithium has many types of applications, from lubricating grease and glass fabrication, to glazes for ceramics, and most importantly, batteries. Lithium is predicted to continue to play an increasingly important role in the battery-powered clean air future for at least the next 20 years.
Geology is important for processing
Lithium is present in a number of different minerals, but for those interested in commercial extraction, there are really only a few deposit types that are of interest. Pegmatites are commonly found throughout the world, but lithium-rich granite Lithium-Caesium-Tantalum (LCT) pegmatite intrusions are much less common, making up less than 1%. These type of ore bodies are the hard-rock source of lithium. The lithium minerals that occur in the LCT granite pegmatites are spodumene, lepidolite, cookeite and amblygonite. Spodumene is the most commonly occurring lithium hard-rock mineral and was once the main source of lithium metal globally. This has now been surpassed by lithium in brines which have become the largest contributor to lithium production.
Lithium hard-rock recovery involves the following key steps: crushing of the ore, concentration by gravity and or froth flotation, to produce a lithium concentrate followed by hydrometallurgy and precipitation of a lithium chemical. This is typically lithium hydroxide or lithium carbonate, which can be sent to factories to be manufactured into its final form.
Evaluating a lithium deposit
Grade is arguably the most important figure in any type of deposit. Typically, spodumene is the highest-grade common lithium mineral and easiest to recover. Coarser minerals are also better for processing. Also, byproducts can also add value to the deposit, including tantalum, niobium, tin, beryllium and caesium. High concentrations of impurities (non-profitable by-products) can lead to higher refinement costs and could limit their use in end use applications, such as glass and ceramics.
Lithium for batteries
Lithium provides the best combination of energy density (weight to power ratio) and price with current technology. Currently, there are an estimated 80 different lithium-ion battery chemistries in production, with these varying chemistries all exhibiting different characteristics, such as capacity and voltage. Lithium is typically found in the cathode of the battery, commonly in the form of lithium cobalt oxide, while the electrolyte is commonly in the form of lithium salts. The anode material is commonly carbon-based, with graphite being the most popular. Lithium ion battery’s output is around 3.6 volts, which is more than twice as much as its alkaline cousin.
Demand for 2025 is projected differently, not only in overall demand tonnage, but in the percentages each application encompasses. The future is expected to be bright for batteries in the non-traditional markets; electric cars, e-bikes, and energy storage.