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|Title:||Cardanol benzoxazine-Sulfur Copolymers for Li-S batteries: Symbiosis of Sustainability and Performance|
|Publisher:||WILEY-V C H VERLAG GMBH|
|Abstract:||A sulfur-rich copolymer is synthesized via a sustainable, eco-friendly approach using two major wastes namely, elemental sulfur (industrial waste) and cardanol (agro waste) and its application as cathode active material in Li-S battery. The presence of chemically bound sulfur (90 wt%) utilising cardanol (10 wt%) derivative in the copolymer (S90) showed a reduction in the active material dissolution into the electrolyte. In addition, the organic sulfur units get dispersed into the insoluble/insulating Li-2 S-2/Li2S phase and thus found to suppress their irreversible dep-osition. Li-S battery based on S90/multi-walled carbon nano-tubes (MWCNT) (10 wt%) exhibited a reversible capacity of 1302 mAh g(-1) at 2nd cycle, maintaining a high reversible capacity of 928 mAh g(-1) after 70 cycles at a relatively constant coulombic efficiency over 99% at current rate of 200 mA g(-1). At 1000 mA g(-1) current rate, the composite cathode delivered a reversible capacity of 697 mAh g(-1) at 2nd cycle and retained 75% of its initial capacity even after 180 cycles.|
|Appears in Collections:||Article|
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