1. The Current Reign of Lithium Batteries
Currently, Lithium-Ion Batteries (LIBs) are the dominant technology used in rechargeable energy storage, representing approximately 70% of the global market share of rechargeable device technologies. The advantages of LIBs include the following:
The High Energy Density of Lithium: The light weight and high electrochemical potential of Lithium allows for the development of smaller and longer-lasting EV batteries and electronics.
Cost-Effectiveness through Scale: With decades of manufacturing experience, LIBs have become fundamentally cheaper to manufacture at volume than most other technologies, allowing LIBs to be cost-competitive in everyday mid-range consumer products.
Established (Worldwide) Infrastructure for LIBs: Extensive support networks for LIBs, including electric vehicle recharging stations and utility-scale power storage systems, have developed extensively over the course of several decades.
Despite their current dominance in this sector, there are several vulnerabilities that exist with regard to LIB technology. There are serious concerns regarding the negative impacts of the mining of Lithium on the environment, depletion of precious water resources, and concentration of Lithium. China currently controls more than 60% of the global capacity for the refining of Lithium, which poses supply chain risks to other countries.
2. Challenges Pushing Lithium Toward Obsolescence
A. Environmental and Ethical Considerations
Lithium extraction has an immensely high ecological impact because the method of extracting lithium is through deep mining (this takes place at depths greater than 1.5km), which is rare, but has a huge ecological footprint and uses an excessive amount of water (up to 1m ltr (almost 500,000 gallons) for 1 metric ton of lithium produced). As water is extremely limited in areas where lithium is extracted (e.g. Northern Chile's Atacama Desert), the need for more water creates a greater strain on the available freshwater supply.
B. Performance Drawbacks
Although lithium ion batteries are the most efficient form of battery in terms of energy density, they have specific limitations:
1. Long Charge Times – The majority of the Electric Vehicle (EV) fleet requires a charge anywhere from 30 minutes to several hours to achieve Full Charge.
2. Cold Weather – The performance of lithium ion batteries is decreased by 60% below freezing and therefore EV's may have reduced uses in cold weather climates.
3. Safety – Thermal Runaway can happen as a result of high energy from lithium ion batteries, typically causing fire, explosion etc., although occurrences of these events are rare but in high energy applications they do exist.
C. Geopolitical Vulnerabilities
As a result of China's overwhelming worldwide battery manufacturing and lithium refining capacity the United States, European Union and other Western Powers to a lesser degree are investing significantly in domestic Battery Manufacturing to reduce their reliance on Chinese Battery Supply.
3. Emerging Technologies Challenging Lithium's Dominance
A. Batteries that are solid-state
Batteries based on solid-state technology swap solid-state electrolytes in place of liquid electrolytes as utilized in typical lithium-ion batteries. Therefore solid-state battery technology has several advantages over lithium-ion battery technology which includes:
The following list provides insight into some of the major reasons that drive the transition of the automotive battery market from liquid to solid-state battery technology. The following points indicate that the transition to solid-state battery technology will occur rapidly within the automotive sector.
Safety: While liquid electrolyte batteries present an increased risk of fire and dangerous chemicals during production, there is no manufacture of potentially hazardous chemicals produced by solid-state batteries' production.
Energy Density: Compared to the existing lithium-ion technology, which can store between 250 and 300 Wh/kg of energy, a solid-state battery has the potential to store up to 500 Wh/kg.
Charge Time: Unlike traditional lithium-ion batteries, which typically require hours to fully charge, experimental solid-state batteries were found to require as little as 15 minutes.
Market Shift: As reported by OEMs, many are in process of developing and producing a solid-state battery pack which will be available to market sometime within the next 5 to 7 years (2027-2030).
B. Sodium-Ion Batteries
Sodium-ion (Na-ion) batteries and lithium-ion (Li-ion) batteries differ in and sodium being more plentiful and less expensive than lithium. The advantages of sodium-ion batteries over lithium-ion batteries include:
1. Price - The manufacturing cost of Na-ion batteries is approximately 70% less than that of Li-ion batteries.
2. Eco-Friendly - The quantity of water required to remove sodium is 682 times less than what is required to remove lithium.
3. Cold Weather Performance - Na-ion batteries can operate at extremely low temperatures down to -30 degrees Celsius.
4. Target Market - Companies like Faradion and CATL have set their sights on introducing sodium-ion technology to the tieredEV and grid-scale energy storage. Using Na-ion batteries technology , these companies will focus on cost-sensitive customers.
C. Graphene-Enhanced Batteries
Graphene, which is made of a single layer of carbon atoms, can improve battery performance in the following ways:
Faster Charging: Graphene supercapacitors can allow a smartphone or tablet to be completely charged in approximately 15 seconds.
Higher Use Cycles: Unlike lithium-ion batteries which are capped at 500-2,000 cycles, a graphene battery can achieve 10,000 cycles.
Cold Weather Resistance Graphene batteries will continue to function well at extreme low -40 to high 80 degrees Celsius.
By 2030, graphene batteries, which are currently undergoing experimental testing, could completely transform energy storage options for renewable energy sources and electric cars.
4. Will Lithium Batteries Survive? A Coexistence Scenario
Due to the experimental phase, graphene batteries might allow for a drastic shift toward new forms of energy storage in renewable energy and electric vehicles by the year 2030. Even with the doomsday predictions surrounding lithium batteries, their extinction seems highly unlikely, with predictions leaning toward their technologies coexisting with new innovations.
A few niche markets will still highly depend on lithium-ion batteries for their high energy density, like aviation, and aerospace with the new electric Vertical Take-Off and Landing (eVTOL). In addition, by using hybrid systems or hybrid combinations of lithium with solid-state or sodium-ion batteries, the combination of chemistry would provide several advantages, including improved cost, safety, performance, etc. For instance, the future BMW electric vehicles will likely be using solid-state and lithium-ion cells in combination as a means of leveraging the respective advantages of each technology.
Furthermore, innovations in lithium cell recycling, including China's plan to recycle 1.2 million tonnes by 2025, will enhance the lifespan of lithium cells while also due to cost and energy savings from less mining.
5. The Road Ahead: Balancing Innovation and Practicality
The evolution to a 'post-lithium battery' system depends upon three main factors:
1. Cost Competitiveness – in order for solid-state batteries and sodium-ion batteries to gain significant market share, they need to reach the equivalent of $100 per kWh for pricing to become comparable to lithium-ion batteries.
2. Scalability – solid-state line manufacturing plants such as the CATL 20GWh line must be able to scale from pilot plant to mass production (2027 target).
3. Policy Support – Government policies must be put into place to encourage and incentivize R&D and recycling infrastructure that can reduce or eliminate supply chain risk associated with lithium.
Conclusion
