Solid-State / Solid-Liquid Electrolyte Li-Ion Battery Innovation & Patent Review

• Company Chapter – Blue Solutions – France

  Version: 2026-02-19, minor update: 2026-05-14, for paid subscribers
• Technology Assessment: Blue Solutions has fielded all-solid-state lithium metal cells in commercial vehicle service while competitors remain at prototype stage – but that deployment rests on elevated-temperature operation. The chapter examines how the move toward ambient-temperature architectures reshapes the electrolyte design problem, why lithium metal defect control at volume remains the central scale-up question, and how public positioning compares with the portfolio's development priorities.
  Product Development Pathway
  (5 R&D Concepts)

  Single-ion conducting copolymer system that dilutes a costly functional monomer with neutral comonomers, addressing the processability, compatibility, and precursor-cost limits that constrain the corresponding homopolymer. Room-temperature grafting platform that attaches single-ion conducting groups onto commercially available polymer backbones, targeting the chain-mobility limits of rigid single-ion polymers. Further concepts address mechanical reinforcement of conductive polymer films without sacrificing ion transport, interface passivation to suppress irregular lithium deposition during plating, and chemical decoupling between the two electrode environments within a single separator membrane.
  Potential Synergies to Deliver Well-Rounded Cells for Application

  Single-ion transport, interface passivation, and membrane-level mechanical and chemical separation form complementary pathways – converging on an ambient-temperature lithium metal architecture where conductivity, dendrite control, and processability qualify together.
• Document size: ≈4,085 words, 12 images, 1 adjacent Excel file (list of patent families with AI-based summaries)

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