from chemistry to pack
Fraunhofer ISE has run a 25 Ah pouch cell with a silicon-rich anode through more than 1,000 full cycles and kept over 83% of its capacity [2]. The same lab ran the cell at two clamping pressures, and the result depends heavily on which one. Pressure is the lever a pack designer controls, so this … Read more
NASA says its SPEARS solid-state cells survive −170 °C and work to −80 °C. What was actually tested, what the conference slides add, and what a lunar rover would need from the cell.
Quantifying microstructure differences across Gr-SiOx anodes stopped at states of charge from 0 to 100%. Introduction Fast charging in graphite-silicon suboxide (Gr-SiOx) composite anodes depends on maintaining efficient ionic transport as the electrode evolves during lithiation. This is particularly challenging because the two active phases undergo different degrees of dimensional change. SiOx offers substantially higher … Read more
How much energy will a cell hold in 2030, or in 2035? (If you need a refresher on the two measures, see cell energy density.) Most answers to that question start from a target or a press release. This one starts from the cells themselves. We took every cell in our cell database that has … Read more
Every solid-state battery announcement over the past year or so has come with a headline charge time: 15 minutes, 12 minutes, sometimes under 10. Feels like a limbo dance at a bar, getting lower and lower as we all get drunk on the lemonade. Lined up next to each other the claims look almost interchangeable, … Read more
2026 OEM Claims vs. Actual Dates Every major automaker and cell maker working on solid-state batteries has, at some point, put a year on when a real customer will be able to buy a car with one inside. Those years keep moving. This post lines up the current public claims from five of the most … Read more
Every solid-state chemistry roundup mentions that cells need “stack pressure,” usually as a single line in a spec table. What that line means for the person actually designing the pack around the cell: This gets skipped almost everywhere. This is the pack-design follow-on to our cell-level piece on What’s the right stack pressure?, which covers … Read more
Choosing a solvent blend or additive package is fundamentally a search problem: a handful of components, each at a continuous concentration, combine into a space with far more candidate formulations than anyone could test by hand. The Electrolyte Solvent Ratios and Electrolyte Additives pages describe what’s in that space and why each component matters. This … Read more
Lithium dendrites growing through a solid electrolyte do not behave like the diffuse, roughly uniform plating seen at a liquid electrolyte interface. In a polycrystalline ceramic or a cold-pressed sulfide pellet, the microstructure itself dictates where lithium goes: dendrites overwhelmingly nucleate and propagate along grain boundaries rather than through the bulk of individual grains, even … Read more
The reference page on LFP’s cathode-electrolyte interface covers coatings and doping as the two established levers. There is a third, newer one that deserves its own look: treating the CEI itself, or the process that forms it, as the thing being engineered. Three recent papers take genuinely different routes to that same goal, and reading … Read more