Stable-state batteries nonetheless aren’t prepared, however gels are

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Lithium-ion batteries are in all places as we enter the second quarter of the twenty first century, and that’s an issue. From exploding e-bikes in stairwells to lithium-ion power banks combusting midflightthe risky nature of conventional liquid electrolytes has grow to be an simple public security hazard.

In 2025, the US Client Product Security Fee (CPSC) issued remembers for nearly 1.9 million energy banks from corporations like AnkerBaseus, and INIU. It additionally prompted remembers for tens of thousands of e-bikes over hearth considerations, whereas issuing a uncommon warning to instantly stop using batteries present in a number of Rad Energy Bikes fashions.

The answer, we’ve been informed for no less than a decade, is the solid-state battery. Its arrival is perpetually imminent and guarantees to ship combustion-free battery cells which can be low cost and light-weight, cost rapidly, run cool, and maintain ungodly quantities of vitality in much less house. It’s no marvel that everybody stopped of their tracks when Donut Lab claimed to have a “miracle” solid-state battery that was prepared for manufacturing. We need to consider!

Alas, what sounded too good to be true seems to be precisely that, having now been thoroughly debunked. However whereas the world was distracted, a brand new class of improved batteries has been making its manner into energy banks, e-bikes, and extra.

These subsequent era batteries aren’t liquid and so they’re not strong; they’re one thing in between. Semi-solid-state batteries are a bridge to the long run, with a gel-like composition that gives some advantages of solid-state, with far much less danger of the thermal runaway exhibited by conventional lithium-ion batteries.

In April 2025, I reviewed the “world’s first” semi-solid-state power bank from an organization referred to as Kuxiu. In the present day, a number of additional brands promote related merchandise. They price slightly extra however pack extra vitality into the identical house and carry out higher in chilly climate. Extra importantly, they’re much less prone to overheat and catch hearth over their lifetimes, which might be two to 3 instances longer than conventional lithium-ion energy banks.

Every product launch is normally accompanied by a video displaying lab-coated hooligans with hammers, nails, drills, pliers, and knives doing their finest to bend, puncture, and tear the batteries. Spoiler: Risky liquid electrolyte ignites, however the semi-solid gels don’t.

Apart from the electrolyte, the basic design of a semi-solid-state battery is in any other case unchanged. You’ve got an anode on one aspect of the semi-solid electrolyte and a cathode on the opposite, with ions scrambling backwards and forwards because the cell costs and discharges. With minor changes, semi-solid-state batteries might be manufactured on the identical meeting strains as their fire-prone friends.

In different phrases, semi-solid-state batteries don’t must blow up the current to energy the long run, and the e-bike trade has taken discover.

Ride1Up is arguably main the cost towards semi-solid state within the US. In early Could, it introduced the Revv1 EVOor what it calls “the world’s first semi-solid-state electrical bike.” The 1,040Wh battery made by Heyuan Lithium Inno is supposed to resist over 1,200 charging cycles, not 500 like typical e-bike batteries, earlier than dropping beneath 80 % of its authentic storage capability. It may additionally cost in two hours and higher stand up to excessive temperatures. It begins transport in August 2026.

To not be outdone, world bicycling large Big introduced on the finish of Could that it will even be adopting semi-solid-state batteries. It’s engaged on no less than 5 mass-produced e-bikes utilizing Heyuan Lithium Inno’s semi-solid-state batteries. It has additionally partnered with T&D, a battery firm spun out of element maker Bafang. Big says T&D’s battery has 50 % extra capability in comparison with lithium-ion and permits them to scale back the frame-integrated weight by 21 %, according to Bike Europe. We’re nonetheless ready for Big to disclose the precise e-bikes.

Chinese language telephones have been capturing headlines with silicon-carbon batteries, however some additionally characteristic semi-solid electrolytes. The change from graphite to silicon-carbon anodes permits these superior batteries to pack much more vitality into much less house. Manner again in 2024, Vivo introduced the X200 collection with a battery that mixed a semi-solid-state electrolyte with a silicon-carbon anode. This identical BlueVolt-branded battery might be present in new Vivo units just like the X300 Ultra.

And that’s simply the beginning. Semi-solid-state batteries are being examined or commercialized in the whole lot from drones to EVs and people big-ass energy stations used for residence backup throughout an influence outage.

The adoption of semi-solid-state batteries throughout machine classes is being pushed, partly, by stricter guidelines imposed by Chinese language regulators.

New guidelines for e-bikes, for instance, which got here into drive in December 2025, require batteries to move a puncture take a look at to see if it triggers a fireplace or explosion. And whereas energy banks aren’t subjected to the identical torture throughout certification, they nonetheless must move a collection of rigorous exams that push liquid electrolytes to their excessive. In any other case they received’t get China’s CCC mark (analogous to the CE mark in Europe or UL within the US) required for air journey.

This presents a compelling case for producers to undertake semi-solid-state batteries, which naturally align with China’s rigorous regulatory requirements. Ought to that occur, it will trigger extra meeting strains to retool and drive down the manufacturing prices, paving the way in which for a wider vary of machine classes to profit from these subtle batteries.

And since China controls the world’s battery provide, all nations might finally profit from the improved security. That’d be excellent news for the US particularly, with its patchwork of state legal guidelines, city ordinancesand elective UL certifications which have thus far didn’t make e-bike batteries and energy banks meaningfully safer nationwide.

As for true solid-state batteries, nicely, we’ll simply need to preserve ready. Within the meantime, Donut Lab says it’s still open for business.