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

• Company Chapter – Contemporary Amperex Technology Limited (CATL) – China

  Version: 2025-11-18, minor update: 2026-05-21, for paid subscribers
• Technology Assessment: The world's largest Li-ion producer advances two distinct electrolyte architectures in parallel rather than converging on one. The chapter examines how each architecture targets a different performance regime and deployment horizon, why moisture sensitivity and mechanical brittleness remain the central scale-up questions for the all-solid track, and how public statements align with what the patent portfolio reveals about development priorities.
  Product Development Pathway
  (10 R&D Concepts)

  Supramolecular ionic liquid electrolyte membranes using self-assembled molecular stacking to form ordered ion transport channels within a polymer matrix, combined with lithium metal negative electrodes. Fiber-reinforced sulfide electrolyte membranes with phase-change toughening agents that absorb fracture energy at grain boundaries and arrest crack propagation. Further concepts address room-temperature transport in polymer backbones, mechanical strength without sacrificing electrode wetting, curing uniformity during in-situ manufacturing, compatibility between inorganic and polymer phases, electrode contact under stiff electrolytes, and environmental tolerance during production.
  Key Synergies

  Two independent electrolyte architectures advanced in parallel, each surrounding a central ion transport mechanism with mechanical, interfacial, and manufacturing concepts – enabling parallel de-risking of near-term deployment and longer-term all-solid qualification.
• Document size: ≈4,000 words, 5 figures, 1 adjacent Excel file (list of patent families with AI-based summaries)

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