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Separators and binders

7 articles

Battery separator

A battery separator is a porous, insulating membrane between a battery cell's anode and cathode that prevents electronic contact while allowing ion transport, strongly affecting safety and cycle life.

Polyethylene separator

A polyethylene separator is a microporous PE membrane in lithium-ion batteries that blocks electrode contact while letting lithium ions pass, with a thermal shutdown near 130–140 °C.

Polyimide separator

A polyimide separator is a porous polyimide membrane that keeps lithium battery electrodes apart, offering far greater heat resistance and dimensional stability than conventional polyolefin separators.

Polypropylene separator

A polypropylene separator is a microporous polypropylene membrane between a lithium-ion battery's electrodes that prevents short circuit while letting lithium ions pass, known for low cost and thermal shutdown.

Polytetrafluoroethylene binder

The polytetrafluoroethylene (PTFE) binder is a fluoropolymer used in dry battery electrode processing, where mechanical shear turns PTFE particles into a fibrous, solvent-free binding network.

Self-healing battery binder

A self-healing battery binder is a polymeric adhesive in lithium-ion electrodes that repairs cycling damage, chiefly for silicon anodes, which swell about 300% in volume. The concept dates to 2013.

SGL Carbon

SGL Carbon SE is a German manufacturer of carbon-based materials, specialty graphites, and carbon-fiber composites, headquartered in Wiesbaden and supplying graphite anode materials for lithium-ion batteries.