Patent Publication: Regenerative Fuel Cell Electrolyte Fluid Additives
Summary
The European Patent Office has published patent application EP4712174A1 concerning fluid additives for regenerative fuel cells. The patent, filed by Services Pétroliers Schlumberger and Schlumberger Technology B.V., describes a method to dislodge gas bubbles from electrodes using specific polymer or surfactant additives in the electrolyte fluid to enhance efficiency.
What changed
This document is a publication of a patent application (EP4712174A1) from the European Patent Office (EPO). It details a technical invention related to regenerative fuel cells, specifically focusing on the use of flexible long chain polymers or viscoelastic surfactants as fluid additives in the electrolyte. The invention aims to improve fuel cell efficiency by dislodging gas bubbles from electrodes through controlled fluid dynamics and elastic turbulence.
While this is a patent publication and not a regulatory rule, it signifies a new technological development in the energy sector. Companies operating in the fuel cell industry, particularly those involved in research, development, or manufacturing of regenerative fuel cell technology, should be aware of this publication. There are no immediate compliance obligations arising from this patent publication; however, it may influence future industry standards or patent landscapes.
Source document (simplified)
FLUID ADDITIVES FOR REGENERATIVE FUEL CELLS
Publication EP4712174A1 Kind: A1 Mar 18, 2026
Applicants
Services Pétroliers Schlumberger, Schlumberger Technology B.V.
Inventors
COLBOURNE, Adam, GARCIA, Javier Rubio, CLARKE, Andrew, SNOSWELL, David
Abstract
A regenerative fuel cell has one half-cell which produces gas while charging and consumes the gas during discharge. The electrolyte liquid circulated through that half-cell contains a flexible long chain polymer or a viscoelastic surfactant. The half-cell is configured to compel the flow of electrolyte liquid to make repeated changes in direction and the flow rate is sufficient that elastic turbulence occurs. This dislodges bubbles of produced gas from the electrodes, maintaining more electrode surface available for reaction and enhancing efficiency. The other half-cell may also be in a state of elastic turbulence enhancing mass transport to and from its electrode surface
IPC Classifications
H01M 8/023 20160101AFI20260203BHEP H01M 8/0258 20160101ALI20260203BHEP H01M 8/18 20060101ALI20260203BHEP
Designated States
AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
Named provisions
Related changes
Source
Classification
Who this affects
Taxonomy
Browse Categories
Get Energy alerts
Weekly digest. AI-summarized, no noise.
Free. Unsubscribe anytime.
Get alerts for this source
We'll email you when ChangeBridge: EPO Bulletin - Batteries (H01M) publishes new changes.