Structure and materials of tapes for electrochemical cells utilizing liquefied gas electrolytes

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 31st, 2026

Detected March 31st, 2026

Summary

USPTO granted patent US12592418B1 to South 8 Technologies, Inc. on March 31, 2026, covering stable polymer materials for tapes in electrochemical cells using liquefied gas electrolytes. The patent addresses degradation issues in conventional polymers like PET and PDMS by using polyimide, polypropylene, or polyethylene tape carriers with PMMA adhesives.

View original document View source feed page

What changed

Patent US12592418B1 was granted covering specific polymer compositions for electrochemical cell components. The invention replaces chemically unstable materials (polyethylene terephthalate, polybutylene terephthalate, polydimethylsiloxane) with stable alternatives (polyimide, polypropylene, polyethylene for tape carriers; poly(methyl methacrylate) for adhesives) to prevent cell failure when using liquefied gas electrolytes.

No immediate regulatory compliance action is required. Third parties seeking to manufacture electrochemical cells with liquefied gas electrolytes may need to license this technology or develop non-infringing alternatives. This patent establishes intellectual property protection for South 8 Technologies, Inc. and does not impose obligations on other entities.

Source document (simplified)

← USPTO Patent Grants

Structure and materials of tapes for electrochemical cells utilizing liquefied gas electrolytes

Grant US12592418B1 Kind: B1 Mar 31, 2026

Assignee

SOUTH 8 TECHNOLOGIES, INC.

Inventors

Jungwoo Lee, Jeremy Intrator, Frederick Krause, Cyrus S. Rustomji

Abstract

Electrochemical cells employing liquefied gas electrolytes may experience degradation of certain polymer components, such as tapes made from poly(ethylene terephthalate), poly(butylene terephthalate), or polydimethylsiloxane. These materials exhibit low chemical stability, potentially leading to cell failure. Embodiments disclosed herein utilize stable polymers, including polyimide, polypropylene, or polyethylene as tape carriers and poly(methyl methacrylate) as adhesives, to enhance compatibility and performance in such cells.