Range anxiety, the creeping fear that your electric car will run out of charge before you reach your destination, remains one of the biggest psychological barriers to electric vehicle adoption around the world.
Current electric cars can travel about 700 kilometers on a single charge, a number that engineers and battery scientists have been trying to surpass for years. Now, a team of researchers at Pohang University of Science and Technology in South Korea has identified what they call a breakthrough: a gel-based solution that could allow electric vehicles to approach 1,000 kilometers on a single charge, using materials that are cheaper and more practical than anything the industry has tried before.
Why silicon has always been the biggest promise and biggest problem for electric vehicle batteries
Silicon has long been the elusive answer to the electric vehicle battery problem. It has a storage capacity that far exceeds that of the graphite anodes used in most lithium-ion batteries today, making it an obvious candidate for next-generation battery design. The problem is what happens when you actually use it. During charging, silicone expands more than three times its original size, then contracts again during discharge.
This mechanical stress, which is repeated, causes the material to break, causing the battery to rapidly deteriorate and make it unstable over time.The industry response has been to use nanosized silicon particles, which are small enough that expansion causes less structural damage. It works to some extent. But producing nanoscale silicon is technically complex and expensive on a large scale, making it difficult to move from the laboratory to mass manufacturing without incurring enormous costs.
How a Electrolytic polymer gel Solves the problem of silicon expansion
The POSTECH team, led by Professor Soojin Park, PhD candidate Minjun Je, and Dr Hye Bin Son, took a different approach. Instead of shrinking silicon down to the nanoscale, they kept it in microscopic particles, 100 times larger than those used in conventional silicon nanoanodes, and paired them with a gelatinous polymer electrolyte instead of the liquid electrolyte found in standard batteries.The gel acts as a stabilizer. Because it is neither fully liquid nor fully solid, it can accommodate the expansion and contraction of larger silicone molecules during charging cycles without the structural crushing that makes standard micro silicone unstable.
The result, published in the journal Advanced Science, was a battery that remained stable even with tiny silicon particles as small as five micrometres, a scale that was previously considered too large to work reliably.
The numbers behind this breakthrough: 40% increase in energy density
The performance numbers associated with the new system are significant. The silicone gel electrolyte formula provides ionic conductivity similar to traditional batteries that use liquid electrolytes, meaning it does not sacrifice the speed at which the charge moves through the battery.
At the same time, it achieved an approximately 40% improvement in energy density compared to current battery designs. This improvement, applied to existing electric car battery packs, is what makes the 1,000 km range within reach.“We used a small silicon anode, but we have a stable battery,” Professor Park said. “This research brings us closer to a true, high-energy-density lithium-ion battery system.”Crucially, the manufacturing process behind the new system does not require exotic or expensive equipment.
The team was frank that the process is straightforward and ready for immediate application, which represents an important distinction in battery research, where breakthroughs that cannot survive the transition to industrial manufacturing rarely reach consumers.
Why is battery detection important outside the laboratory?
POSTECH’s breakthrough comes at a time when the global electric vehicle battery race is rapidly accelerating. Chinese company CATL recently unveiled its Qilin compact battery at the 2026 Beijing Auto Show, claiming a range of up to 1,500 kilometers using semi-solid-state chemistry.
Meanwhile, Geely, Toyota and a host of Western startups are pursuing solid-state battery technologies with similar far-reaching ambitions, though most are not expected to reach mass production before the late 2020s or early 2030s.What distinguishes the POSTECH gel approach is its relative simplicity. Solid-state batteries, for all their promise, face serious manufacturing and durability challenges, which have kept them out of production vehicles for years.
A polymer gel electrolyte system that works with existing lithium-ion manufacturing infrastructure and provides a 40% increase in power density without the expense of nanoscale silicon represents a near-term path to meaningful range improvement.
What comes next for silicon gel EV batteries?
The study was supported by the Independent Researchers Program of the National Research Foundation of Korea, and the team’s immediate next steps include optimizing the system for durability over long charging cycles, the real-world test that all battery chemistries must eventually pass.For electric vehicle drivers, the importance is straightforward. A car that can travel 1,000 kilometers on a single charge is no longer a car that requires careful route planning, deliberate stops for charging or constant attention to the battery indicator. It is simply an electric car. Getting there has always been a chemistry problem. A team in South Korea may have found a practical answer inside a jar of gel.
