Cobalt-free cathode for lithium-ion batteries: Innovation can lead to safe, long-lasting power storage for electric vehicles and equipment.

By On Sep 22, 2022

Researchers at the University of California, Irvine and four national laboratories have developed a way to make lithium-ion battery cathodes without using cobalt, a mineral plagued by price fluctuations and geopolitical problems.

In a paper published today in Nature, scientists describe how they overcame the thermal and chemical stability of cathodes made of nickel — a common substitute for cobalt — by combining other metals.

“Using a technique we refer to as ‘high-level doping’, we were able to successfully create a cobalt-free cathode with very high thermal tolerance and high frequency charge cycles,” he said. said corresponding author Huolin Xin, UCI professor of physics & amp; astrology. “This breakthrough resolves long-standing safety and stability concerns surrounding high-nickel battery materials, paving the way for broad-based commercial applications.”

Cobalt is one of the biggest threats to supply chains in the adoption of electric cars, trucks and other electronic devices that require batteries, according to the authors of the paper. The mineral, which is chemically suitable for the purpose of stabilizing lithium-ion battery cathodes, is almost exclusively mined in the Democratic Republic of Congo under abusive and inhumane conditions.

“Electric vehicle manufacturers are keen to reduce the use of cobalt in their battery packs not only to reduce costs but to prevent child labor practices used in mining,” said Xin. “Research has also shown that cobalt can lead to the release of oxygen at high energies, which is damaging to lithium-ion batteries. All this points to the need for replacement.”

However, nickel-based cathodes come with their own problems, such as poor heat tolerance, which can cause battery material oxidation, overheating and even explosion. Although high-nickel cathodes can accommodate large capacities, volume stress from repeated expansion and contraction can cause poor stability and safety concerns.

The researchers sought to address these issues through a complex combination of high-entropy doping using HE-LMNO, a composite of the transition metals magnesium, titanium, manganese, molybdenum and niobium inside the building, with some of these minerals used on the surface and interface. with other battery components.

Xin and his colleagues employed a variety of synchrotron X-rays, transmission electron microscopes and 3D nanotomography devices to determine that the cobalt-zero cathode exhibited unprecedented zero-to-zero volume changes. there is frequent use. The very stable structure is able to withstand more than 1,000 cycles and high temperatures, which makes it similar to cathodes with low nickel content.

For some of these research tools, Xin collaborated with researchers at the National Synchrotron Light Source II, located at the Department of Energy’s Brookhaven National Laboratory in New York. As a DOE Office of Science user center, NSLS-II gave the team access to three of the 28 science instruments — called beamlines — to study the internal structure of the new cathode.

“The combination of different methods of the NSLS II beamlines enabled the discovery of the effect of oxygen vacancy traps and defects inside the material, which effectively prevents the formation of cracks in the upper part of HE-LMNO, making this model very stable during cycling,” said co-author Mingyuan Ge, a scientist at NSLS-II.

Xin added: “Using this advanced device, we were able to observe greatly increased thermal stability and zero-volumetric change characteristics of the cathode, and were able to demonstrate remarkably improved power retention and cycle life. This research can set the stage for developing energy-dense alternatives to existing batteries.”

He said the work is a step toward achieving the dual goal of promoting the proliferation of clean transportation and energy storage while addressing environmental justice issues surrounding the extraction of minerals used for batteries.

The project, funded by the Department of Energy’s Office of Energy Efficiency and Renewable Energy, also involved researchers from Illinois’ Argonne National Laboratory, the Pacific Northwest National Laboratory and SLAC’s National Accelerator Laboratory. California.

Contents

Which is the electrode used in lithium-ion battery?

Electric current is generated when lithium ions move from the negative electrode (anode) to the positive electrode (cathode) through the electrolyte during discharge. The reverse of this process results in the integration of lithium ions back to the anode and their removal from the cathode to produce a charged state.

Is lithium used as anode or cathode? (A metal-lithium battery uses lithium as the anode; Li-ion uses graphite as the anode and the active material as the cathode.) Lithium is the lightest of all metals, has the greatest electrochemical potential and provides the specific energy of largest by weight.

Which electrode is used in battery?

One electrode, called the cathode, connects to the positive end of the battery and is where electricity (or electrons) leave the battery during discharge, which is when the battery is used to power something.

Which electrolyte is used in battery?

Potassium hydroxide is the electrolyte in common alkaline batteries. The most common electrolyte in lithium batteries is a lithium salt such as lithium hexafluorophosphate (LiPF6).

Are electrodes in batteries?

A battery consists of one or more chemical cells. Each cell contains two metal electrodes and at least one electron solution (a solution containing ions that can conduct electricity). A battery works by an electrical reaction called oxidation and reduction.

What is the working electrode in a battery?

Batteries usually have two electrodes: the anode and the cathode. The ions pass through the separator to the electrode during either charging or discharging cycles and release energy in the process. Battery test units can be built to include third party power. This is called the reference electrode (RE).

Will we run out of cobalt?

More than 70% of the world’s cobalt is mined in the Democratic Republic of the Congo, and every country that produces electronics wants that source. But based on operating mines and projected demand, forecasters predict that supply will not be able to keep up with demand by 2030, or even as early as 2025.

Is there an alternative to cobalt? Some cobalt-free batteries already exist, but they require some commercialization. â There is already a non-cobalt battery that can work and that is lithium iron phosphate or LFP.

Is cobalt in short supply?

According to researchers’ estimates based on mining and projected demand data, cobalt supply will not be able to keep up with demand by 2030, even if we recycle used cobalt. Cobalt is one of the most important components in lithium-ion batteries as it increases energy density and extends battery life.

Why is cobalt in short supply?

Plans to expand cobalt mines in the DRC have helped ease supply forecasts for the metal used in rechargeable batteries. The market deficit for cobalt is shrinking as the world’s leading producer of the precious metal expands production to meet demand for batteries used in electric vehicles.

Is cobalt in high demand?

Cobalt demand is expected to increase rapidly as the EV transition progresses. Demand is projected to approach 320 kt in the next 5 years from 175 kt in 2021; 70% of the growth will come from the EV segment. Supplies will keep pace with demand in the short term, however supply chain challenges remain a significant risk.

How much cobalt do we have left?

Major Countries Based on Cobalt Reserves 2021 Since the total global cobalt reserves are 7.6 million metric tons, this means that DR Congo’s cobalt reserves represent almost half of the world’s metal reserves.

How much cobalt is there left?

Since the total global cobalt reserves are 7.6 million metric tons, this means that DR Congo’s cobalt reserves represent almost half of the world’s metal reserves.

Where are the largest cobalt reserves?

According to the report, DR Congo boasts the world’s largest supply of cobalt ore deposits (3,500,000 tons), followed by Australia (1,400,000 tons) and Indonesia (600,000 tons). This means that DR Congo’s cobalt reserves are almost half (46%) of the world’s cobalt reserves.

How much cobalt is left in the earth?

According to the US Geological Survey (USGS), the total reserves of cobalt worldwide are estimated at 7.1 million tons, with 140,000 tons produced globally in 2020.

How much cobalt do we need?

The average adult intake of cobalt is 5 to 8 mcg per day. A safe Recommended Dietary Allowance (RDA) for cobalt has not yet been established. Trace amounts of cobalt are found in most foods.

What is the future of cobalt?

Will cobalt prices rise?

Since its launch, the price of both contracts has risen. Cobalt is now trading at $34/kg, more than double its launch level. The price of lithium increased even faster, from $13/kg in May 2021 to more than $40 in February 2022.

Does Tesla use cobalt?

Tesla already uses cobalt-free LFP batteries in half of its new cars. Tesla has confirmed that almost half of all its cars produced in the last quarter have already used cobalt-free metal-phosphate (LFP) batteries.

Is the demand for cobalt going up or down?

On the demand side, global demand for cobalt is expected to be 194,000 mt of iron content, an increase of 27% annually. The demand for electric battery market will increase significantly in 2021.

Are children mining cobalt?

Of the 255,000 Congolese cobalt miners, 40,000 are children, some under the age of six. Most of the work is informal small-scale mining where workers earn less than $2 a day using their own tools, primarily their hands.

Who is mining cobalt? Today, a company called Nornickel is the world’s largest producer of refined nickel, and its mine in Norilsk region will produce more than 4 percent of global cobalt by 2021.

Is mining cobalt safe?

Waste from cobalt and other metals can contaminate water, air and soil, leading to reduced crop production, food and water contamination, and respiratory and reproductive health issues. The miner said the working conditions were unsafe, unfair and stressful.

Why is cobalt mining good?

Cobalt is a required metal in battery technology that is driving the transition to ‘green’ electric vehicles. It also provides income to 150,000-200,000 miners and their dependents in impoverished areas of the DRC.

Is cobalt mining ethical?

Low labor costs, relaxed regulations, and poor governance in the DRC allow the development of artisanal mining and cheap sources of cobalt. However, cobalt from the DRC is tainted by ethical and humanitarian issues, including: Child labor. Corruption.

Is cobalt toxic to the environment?

Cobalt is also essential for the health of various animals, such as cattle and sheep. Exposure of humans and animals to levels of cobalt normally found in the environment is not harmful.

How dirty is cobalt mining?

Materials released during cobalt mining include radioactive emissions, cancer-causing particles, and particles that can cause vision problems, vomiting and nausea, heart problems, and thyroid damage.

Is cobalt toxic to the environment?

Cobalt is also essential for the health of various animals, such as cattle and sheep. Exposure of humans and animals to levels of cobalt normally found in the environment is not harmful.

Where is 60% of the world’s cobalt mined?

Since the 1960s, the world’s cobalt mine production has been concentrated in the Democratic Republic of Congo.

Is cobalt mined with child labor?

Cobalt is an essential element used by major technology companies in rechargeable lithium-ion batteries, electrical appliances, and electric vehicles. However, DRC’s valuable cobalt industry comes at a price: extracting the mineral is dependent on child labor, safety risks, environmental abuses, and corruption.

What does NMC stand for in batteries?

Lithium-Nickel-Manganese-Cobalt-Oxide (LiNiMnCoO2), abbreviated to NMC, has become the cathode powder designed to develop batteries for electric appliances, e-bikes and other electric trains.

Which battery is better LFP or NMC? Battery life is historically not long. A ship can operate for up to 30 years or more, however, a typical NMC battery sometimes lasts for at least 6 years. LFP can provide better cycle life, but in terms of cycle life, LTO batteries are the clear winner.

Do NMC batteries contain lithium?

In short, NMC batteries offer a combination of Nickel, Manganese and Cobalt. They are sometimes called Lithium Manganese Cobalt Oxide batteries.

Does NMC battery have lithium?

NMC uses Lithium, Manganese, and Cobalt oxide as cathode materials while LFP uses Lithium Iron Phosphate chemistry. Both types of batteries use a graphite anode.

Do lead acid batteries have lithium?

Two of the most common types of battery chemistry are lithium-ion and lead acid. As their names suggest, lithium-ion batteries are made of lithium metal, while lead-acid batteries are made of lead.

What is NCM lithium battery?

Li-ion battery consists of four main parts: cathode, anode, electrolyte and separator. A battery type is usually named after its cathode material such as an NCM battery or an LFP battery. NCM contains Lithium, Nickel, Cobalt and Manganese while LFP contains Lithium, Iron and Phosphate.

How long does a NMC battery last?

NMC batteries have an expected cycle life of about 2000-2500 cycles. These batteries can provide full power for up to three to four years, with rapid degradation thereafter.

What is the lifespan of a rechargeable lithium battery?

The typical life expectancy of a Lithium-ion battery is about two to three years or 300 to 500 charging cycles, whichever comes first. One charge cycle is the time of use from fully charged, to fully charged, to fully charged again.

Is NMC a lithium battery?

NMC battery is a type of lithium ion battery. NMC batteries have a cathode made of nickel, manganese, and cobalt. You’ve probably used NMC batteries more than you know – they power smartphones, laptops, and electric cars. They are also one of the most popular options for solar storage.

Will LFP batteries last longer?

Long cycle life Many studies show that LFP batteries have a cycle life of 2 to 4 times longer than NMC batteries. However, with a slightly lower range, you may need more cycle life to achieve the same mileage as an NCA or NCM kit.

What is NCM battery?

A battery type is usually named after its cathode material such as an NCM battery or an LFP battery. NCM contains Lithium, Nickel, Cobalt and Manganese while LFP contains Lithium, Iron and Phosphate.

Is NCM a lithium ion?

Lithium iron phosphate (LiFePO4) and Lithium Nickel Manganese Cobalt Oxide (NCM) are both members of the lithium-ion battery family. Li-ion battery consists of four main parts: cathode, anode, electrolyte and separator. A battery type is often named after its cathode material such as an NCM battery or an LFP battery.

What does NCM stand for in batteries?

Lithium nickel manganese cobalt oxides (abbreviated as Li-NMC, LNMC, NMC or NCM) are mixed metal oxides of lithium, nickel, manganese and cobalt.

What is the difference between LFP and NMC batteries?

Both NMC and LFP are lithium-ion batteries, but the cathode material is different in both. NMC uses lithium, manganese, and cobalt oxide as cathode materials while LFP uses lithium metal phosphate chemistry. Both types of batteries use a graphite anode.