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Polyaniline-coated S/Super-P composites as cathode materials for high performance lithium-sulfur batteries by Zilong Li; Bin Wang; Haiping Su; Yazhuo Shang; Honglai Liu is a Engineering article available to read on EtoBox.

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Lithium-sulfur (Li-S) batteries are promising alternatives to conventional lithium-ion batteries owing to their high theoretical capacity and eco-friendliness. However, their commercialization has been limited due to poor cathode conductivity and polysulfide dissolution. In this study, we synthesized a S/Super-P @ Polyaniline (S/ Super-P @ PANi) composite via a straightforward high-energy ball milling (HEBM) and in-situ oxidative polymerization process. The refined sulfur and Super-P particles were encapsulated by a conductive PANi coating shell, which not only facilitated electron transfer but also inhibited the dissolution of lithium polysulfides through physical confinement and chemical adsorption. The S/Super-P @ PANi electrode showed a high initial capacity of 1185.3 mAh⋅g -1 at 0.1 C. Under a sulfur loading of 3.5 mg⋅cm -2 , the electrode delivered an areal capacity of 2.8 mAh cm -2 and maintained 1.8 mAh cm -2 after 400 cycles, with a capacity decay rate of 0.08% at 0.5 C. This rational and scalable synthesis method has great potential for use in high-performance Li-S batteries.

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Author

Zilong Li; Bin Wang; Haiping Su; Yazhuo Shang; Honglai Liu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)