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China claims solid-state battery breakthrough could double EV range

tiencars by tiencars
17/10/2025
in World
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China claims solid-state battery breakthrough could double EV range
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Chinese researchers say they’ve cracked some of the toughest problems holding back solid-state batteries — the technology that could finally let electric vehicles travel 1,000 km on a single charge instead of the 500 km or so most manage today.

State broadcaster CCTV reported the advances on Oct 16, highlighting work from three separate teams. But as with most battery announcements, especially ones that come through state media, the devil’s in the details — and a lot of those details are missing.

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The most intriguing work comes from the Chinese Academy of Sciences, where researchers developed an iodide-ion layer that apparently migrates to the trouble spot between lithium metal and the solid electrolyte.

Think of it as a kind of self-healing grout that fills in microscopic gaps. Those gaps are a major headache in solid-state batteries because they create resistance, allow damaging dendrites to form, and ultimately kill the battery early.

Another CAS team took a different tack: making the brittle ceramic electrolyte tougher.

They embedded it in a polymer framework that can bend and twist without cracking — sort of like adding rebar to concrete. Their lab tests showed up to 86% better capacity, though we don’t know much about the actual cell design or how they tested it.

Meanwhile, Tsinghua University went after the voltage problem. They used fluorinated materials to create a protective layer on electrodes that lets the battery operate at higher voltages without breaking down.

Their cells supposedly survived nail penetration and two hours in a 120°C oven while fully charged — the kind of abuse tests that would make a conventional lithium-ion battery catch fire.

None of these reports included the kind of data battery experts really want to see: How many charge cycles did the cells survive? How fast can they charge? What about manufacturing. Can you actually make these materials at scale without spending a fortune?

And there’s no timeline. Are we talking about batteries in cars next year, or lab curiosities that might never leave the research facility?

This isn’t unique to China.

Solid-state battery announcements have become something of a running joke in the EV world.

Companies and research labs worldwide have been promising breakthroughs for years, yet we’re still waiting for the first commercially viable solid-state EV battery.

The core problem these Chinese teams are tackling is real, though.

Solid electrolytes just don’t play nice with soft lithium metal — it’s like trying to make a good seal between glass and putty. Poor contact means ions can’t flow efficiently, and the battery degrades fast.

If these three approaches actually work outside the lab and can be manufactured cheaply enough, we could see a genuine leap forward in EV range.

But that’s a lot of ifs. For now, consider this another entry in the “promising but unproven” category.

Tags: China broadcaster CCTVChinese Academy of SciencesChinese researcherssolid-state batteries
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tiencars

tiencars

Veteran writer, street food lover and all-around car enthusiast. The creator of all that you see on this patch of the Internet. Call me Ed.

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  • New Volvo XC60 priced, cheaper EC40 single-motor, XC90 gets new silver colour
  • China claims solid-state battery breakthrough could double EV range
  • Porsche names Michael Leiters CEO from 2026
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