Range anxiety, the fear that your electric vehicle will run out of charge before reaching your destination, remains one of the biggest psychological barriers to EV adoption worldwide. current electric vehicle It can travel about 700 kilometers on a single charge, a number engineers and battery scientists have been trying to push for years. Now, a team of researchers at South Korea’s Pohang University of Science and Technology has identified what they’re calling a breakthrough: a gel-based solution that could allow EVs to drive up to 1,000 kilometers on a single charge, using materials that are cheaper and more practical than anything the industry has tried before.

Why has silicon always been the biggest promise and biggest problem of EV batteries?

Silicon has long been an attractive answer to the EV battery problem. Its storage capacity far exceeds that of the graphite anodes used in most lithium-ion batteries today, making it an obvious candidate for the next generation of battery designs. The problem is what happens when you actually use it. During charging, the silicon expands to more than three times its original size, then shrinks back during discharge. When done repeatedly, this mechanical stress causes the material to fracture, causing the battery to wear out faster and become unstable over time.The industry response has been to use nano-sized silicon particles, which are small enough that expansion causes less structural damage. This works to a certain extent. But nano-silicon production is technically complex and extremely expensive to scale, making it difficult to move from the laboratory to large-scale manufacturing without huge cost implications.

how a gel polymer electrolyte Silicone solves the expansion problem

The POSTECH team, led by Professor Soojin Park, PhD candidate Minjun Jae and Dr. Hye Bin Son, took a different approach. Instead of shrinking the silicon to the nanoscale, they placed it on microscopic particles a hundred times larger than those used in conventional nano-silicon anodes and combined them with a gel polymer electrolyte instead of the liquid electrolyte found in standard batteries.The gel acts as a stable medium. Because it is neither completely liquid nor completely solid, it can accommodate the expansion and contraction of large silicon particles during charging cycles without the structural fracturing that makes standard micro-silicon unstable. The result, published in the journal Advanced Science, was a battery that remained stable even with micro-silicon particles up to five micrometers in size, a scale that was previously thought to be too large to work reliably.

The numbers behind this breakthrough: 40% more energy density

The performance figures associated with the new system are important. The silicone-gel electrolyte combination provides ion conductivity equivalent to conventional batteries using liquid electrolytes, meaning it does not sacrifice the speed at which charge moves through the battery. Additionally, it achieved approximately 40% improvement in energy density compared to current battery designs. This improvement, applied to existing EV battery packs, keeps the 1,000 km range figure within reach.“We used a micro-silicon anode, yet we still have a stable battery,” Professor Park said. “This research brings us closer to a real 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 clear that the process is straightforward and ready for immediate application, a key gap in battery research, where breakthroughs unable to survive the transition to industrial manufacturing rarely reach consumers.

Why does this battery discovery matter beyond the lab?

POSTECH’s success comes at a time when the global EV battery race is rapidly intensifying. China’s CATL recently unveiled its Qilin compressed battery at the 2026 Beijing Motor Show, with a claimed 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 long-range 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, despite all their promise, face serious manufacturing and durability challenges that have kept them from production vehicles for years. A gel polymer electrolyte system that works with existing lithium-ion manufacturing infrastructure and provides a 40% energy density gain without the expense of nano-silicon represents a more near-term path to meaningful range improvements.

What’s next for silicone gel EV batteries

The study was supported by the Independent Researcher Program of the National Research Foundation of Korea, and the team’s immediate next steps include refining the system for durability over long charging cycles, the real-world test that all battery chemistries must ultimately pass.For EV drivers, the importance is straightforward. A vehicle that can travel 1,000 kilometers on a single charge is no longer a car that requires careful route planning, deliberate charging stops or constant attention to the battery indicator. It’s just a car that runs on electricity. Getting there has always been a chemistry problem. A team in South Korea may have found a practical answer inside a jar of gel.