Low‐Temperature Synthesis of a Sulfur‐Polyacrylonitrile Composite Cathode for Lithium‐Sulfur Batteries

PÁEZ JEREZ, ANA L.; CHEMES, DOLY M.; SHAM, EDGARDO L.; DAVIES, LILIAN E.; TESIO, ALVARO Y.; FLEXER, VICTORIA

ChemistrySelect

WILEY-VCH

Lugar: Londres; Año: 2020 vol. 5 p. 5465 - 5472

2365-6549

Through a novel synthesis process, a novel sulfurized polyacrylonitrile(SPAN) composite, noted as DH-150-300-SPAN, wasprepared and tested as cathode material for lithium sulfur(Li-S) batteries. The reported process involves two heatingsteps at low temperature. The first plateau at 150°C meltselemental sulfur, while the second, at 300°C, produces thecycling of polyacrylonitrile, and incorporates sulfur to the cyclicpolymeric structure. A fully morphological and electrochemicalcharacterization was carried out. The SPAN composite contains(38.3 +/- 0.2) % S. Li- S batteries assembled using these cathodeshave shown good performance, reaching high and stablecapacity values, above 1000 mAhg- 1S after 150 cycles at 0.1 C.This is the first time that stable cycling is achieved for a SPANcomposite synthesized at such low temperatures and for shortheating treatments. Our work describes an easy route toprepare a promising candidate for cathode material of Li- Sbatteries by using a low-cost process and low-cost materials.