Home Chemistry Carbon-coated ReS2 hierarchical nanospheres to inhibit polysulfide dissolution in ether-based electrolytes for high-performance Na-ion batteries

Carbon-coated ReS2 hierarchical nanospheres to inhibit polysulfide dissolution in ether-based electrolytes for high-performance Na-ion batteries

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Carbon-coated ReS2 hierarchical nanospheres to inhibit polysulfide dissolution in ether-based electrolytes for high-performance Na-ion batteries

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On this work, we report a easy hydrothermal route coupled with put up carbonization therapy to synthesize novel ReS2/C hierarchical nanospheres as a complicated sodium storage anode in ether-based electrolytes (EBEs). Within the ReS2/C architectures, few-layered ReS2 nanosheets with an expanded interlayer spacing of 0.67 nm are self-assembled to type hierarchical nanospheres, offering a strong construction and a big floor space facilitating electrolyte contact in sodium-ion batteries (SIBs). The amorphous carbon coating performs key roles in not solely enhancing the digital conductivity but in addition inhibiting the shuttle impact of polysulfides in EBEs, which leads to superior high-rate functionality and glorious cyclability. Consequently, the ReS2/C anode yields a excessive particular capability of 185 mAh/g at an ultra-high present density of 20 A/g, and maintains a particular capability of 209 mAh/g after circulating 3000 cycles at 10 A/g as the best present density for long-term biking up to now. In contrast with the carbonate-based electrolytes (CBEs), the ReS2/C anode containing EBEs exhibits considerably extended biking lifespan and improved high-rate functionality. Furthermore, the Na3V2(PO4)3║ReS2/C full cell is demonstrated for the primary time and delivers respectable biking efficiency of 300 cycles at 1C with a capability retention of 95.9%. Our work supplies new perception into enhancing sodium storage efficiency of ReS2-based anodes by nanoscale engineering and electrolyte modulation.

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