کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6464974 | 1422946 | 2018 | 8 صفحه PDF | دانلود رایگان |
- Self-supporting GNS/aMWCNT foam@S cathode is fabricated by solvothermal reaction followed by electrochemical deposition.
- A novel P(BA-co-PEGDA)/LiTFSI-DOL/DME quasi-solid-state polymer electrolyte is prepared.
- As-assembled Li-S batteries exhibit excellent cycling stability.
The dissolution and shuttle of the intermediate lithium polysulfides are major issues which restrict practicality of lithium-sulfur batteries. Herein, self-supporting graphene/acid-treated multi-walled carbon nanotube organic foam-supported sulfur (oGCTF@S) composites are fabricated by solvothermal reaction followed by electrochemical deposition. The oGCTF@S composites can provide high electronic conductivity and much void space for accommodating volume change of sulfur and confine dissolution of the polysulfides by physical adsorption. In addition, a novel quasi-solid-state polymer electrolyte (QPE) of poly(butyl acrylate)/poly(ethylene glycol) diacrylate (P(BA-co-PEGDA))/LiTFSI-DOL/DME is prepared to further suppress the polysulfides shuttle through chemical adsorption with oxygen-containing functional groups. The lithium-sulfur battery assembled by oGCTF@S composites cathode and QPE shows a high initial discharge capacity of 1033 mAh gâ1, and the capacity can retain 834 mAh gâ1 after 200 cycles at 0.1 C, which is much more stable than that with the commercial separator and liquid electrolyte (LE).
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Journal: Chemical Engineering Journal - Volume 332, 15 January 2018, Pages 8-15