Solid-state / Semi-solid Li-ion Battery Innovation & Patent Review

• Company Chapter – Ohara – Japan

  Version: 2026-10-12, for paid subscribers
• Technology Assessment: Ohara positions as a materials supplier rather than a cell maker – its oxide glass-ceramic powder already sells into conventional liquid-electrolyte cells, while the same material is re-specified for a co-fired oxide stack. The chapter examines how near-term additive commercialization complements longer-term solid-state development, why joining electrodes to a fired electrolyte remains the central scale-up question, and where patent filings and public claims converge.
  Product Development Pathway
  (5 R&D Concepts)

  Crystallographically specified glass-ceramic powder, with unit-cell geometry held in range by a co-existing secondary crystal phase to lift low-temperature power when dosed into a conventional liquid-electrolyte cathode. Oxide electrolyte composition deliberately held off its ideal stoichiometry, so particle surfaces stay reactive toward an added glass and ionic conductivity potentially survives the low-temperature co-firing an oxide stack requires rather than collapsing at grain boundaries. Further concepts address densification without applied pressure at temperatures electrode materials can tolerate, acid-driven capacity fade in conventional cells, and cathode interface stability on a different all-solid-state platform.
  Key synergies between R&D concepts: One melt-derived glass-ceramic body graded, re-specified or fired across two complementary tracks – additive grades qualifying in liquid-electrolyte cells while composition and sintering-aid design potentially open a co-fired oxide stack, enabling parallel de-risking.
• Document size: ≈5000 words, 7 images, 1 adjacent Excel file (list of patent families with AI-based summaries)

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