Nickel is one of the most versatile metals on the planet, essential to everything from the batteries powering electric vehicles to the enzymes that help plants process nitrogen. The global nickel market is projected to reach $47.6 billion by 2026, growing at over 7% annually, driven largely by demand from clean energy, aerospace, and medical technology. Here’s why this silvery-white metal matters across so many fields.
Powering Electric Vehicles
Nickel’s biggest growth story right now is in lithium-ion batteries. In the cathodes of EV batteries, nickel is the ingredient that increases energy density, which directly translates to driving range. The more nickel packed into a cathode, the more energy the battery stores per unit of weight. This is why battery manufacturers have been pushing toward “nickel-rich” formulations, steadily increasing the proportion of nickel while reducing cobalt, which is expensive and raises ethical sourcing concerns.
The most common cathode chemistry in EVs combines nickel, manganese, and cobalt (known as NMC). Each metal plays a distinct role: nickel boosts energy storage, manganese prevents overheating, and cobalt adds thermal stability. The industry trend is unmistakable. Newer battery generations contain a higher percentage of nickel and less cobalt, making nickel the single most critical cathode material for the electric vehicle transition.
Keeping Jet Engines Running
Nickel-based superalloys are the backbone of modern aerospace engineering. Jet engine turbine blades and disks operate at extreme temperatures where most metals would soften or deform. Nickel superalloys resist this degradation. NASA’s Glenn Research Center has developed nickel-based compositions that resist deformation at temperatures above 700°C, pushing the operating limits of turbine disks even further.
What makes nickel special here is its ability to maintain structural integrity under sustained heat and mechanical stress, a property engineers call “creep resistance.” Without nickel superalloys, modern commercial and military jet engines simply couldn’t generate the thrust they do. The same properties make nickel alloys valuable in power generation turbines and chemical processing equipment that operates under harsh conditions.
A Critical Nutrient for Plants
Nickel is officially classified as an essential micronutrient for plants. Its primary job is activating urease, the enzyme that breaks down urea in plant tissues. Without enough nickel, urea accumulates to toxic levels. When urease functions properly, it converts urea into ammonia, and the nitrogen from that ammonia gets recycled into amino acids, polyamines, and other compounds the plant needs to grow.
More recent research has expanded nickel’s biological resume beyond urease. Nickel also appears to activate a form of glyoxalase I, an enzyme that degrades methylglyoxal, a toxic byproduct of normal cellular metabolism. This means nickel plays a role in helping plants tolerate stress, not just manage nitrogen. A plant deficient in nickel doesn’t just struggle with nitrogen processing; it becomes more vulnerable to environmental pressures.
Interestingly, no nickel-dependent enzymes have been found in mammals. But in bacteria, archaea, and primitive organisms, nickel is a cofactor for nine known enzymes that perform jobs ranging from breaking down carbon monoxide to neutralizing damaging oxygen radicals. Soil bacteria that depend on nickel-containing enzymes are part of the nutrient cycles that keep ecosystems functioning.
Medical Devices That Remember Their Shape
One of nickel’s most remarkable applications comes from an alloy called Nitinol, a roughly equal blend of nickel and titanium. Nitinol has a property called “shape memory,” meaning it can be deformed and then return to its original shape when warmed. It’s also superelastic, able to flex far more than ordinary metals without permanent damage.
These properties have made Nitinol a go-to material for medical devices. Self-expanding cardiovascular stents, the small mesh tubes that hold open clogged arteries after angioplasty, rely on Nitinol’s ability to be compressed into a thin catheter and then spring open once placed inside a blood vessel. Orthodontic wires use the same superelastic behavior to apply gentle, consistent pressure to teeth over time. Nitinol’s biocompatibility, meaning the body tolerates it well, and its fatigue resistance make it uniquely suited to devices that need to flex millions of times inside the human body.
Stainless Steel and Everyday Corrosion Resistance
The largest single use of nickel, by volume, remains stainless steel production. Adding nickel to steel dramatically improves its resistance to corrosion, makes it easier to form into complex shapes, and increases its toughness at low temperatures. The kitchen sink, surgical instruments, food processing equipment, and building facades all depend on nickel-containing stainless steel. About two-thirds of all nickel produced globally goes into stainless steel and other alloy applications, forming the invisible backbone of infrastructure and manufacturing worldwide.
Recycling and Environmental Impact
Nickel is one of the more recyclable industrial metals, though the picture is complicated. Over 40% of nickel from end-of-life products was recovered in 2023, based on what was theoretically available for recycling. However, the overall share of recycled nickel in global supply actually dropped from 35% to 31% between 2015 and 2023, largely because demand grew faster than recycling capacity could keep up.
The environmental case for recycling is strong. Recycled nickel produces roughly 80% less greenhouse gas emissions than freshly mined nickel, according to the International Energy Agency. Scaling up nickel recycling could deliver a 35% cumulative reduction in emissions from producing the lithium, nickel, and cobalt needed for clean energy technologies through 2040. As EV batteries from the first generation of electric cars start reaching end of life in the coming years, nickel recovery from spent batteries will become an increasingly important part of the supply chain.
Nickel Allergy: The Health Tradeoff
For all its industrial value, nickel is also the most common cause of contact allergy from metals. In Europe, roughly 8 to 19% of adults and 8 to 10% of children have a nickel allergy, which causes an itchy, red rash where nickel-containing objects touch the skin. Earrings are the most prominent trigger. One large study found that ear piercing increased the odds of developing nickel allergy more than fivefold in children surveyed in 2017.
The allergy is significantly more common in girls and women, largely due to higher rates of ear piercing. Children with eczema are also more susceptible, with nickel allergy rates roughly double those of children without eczema. European regulations limit the amount of nickel that consumer products can release onto skin, but enforcement gaps persist. Studies have found that around 15% of inexpensive earrings sold in Denmark and nearly a third of earrings imported from China exceeded nickel release limits. Mobile phones, laptop surfaces, keys, and even children’s toys have been documented as nickel exposure sources.
The good news is that allergy rates among schoolchildren appear to be declining slightly, dropping from 7.7% to 6.1% over roughly a decade, likely due in part to regulations limiting nickel in jewelry and consumer goods.