A pomegranate-structured sulfur cathode material with triple confinement of lithium polysulfides for high-performance lithium–sulfur batteries
| العنوان: | A pomegranate-structured sulfur cathode material with triple confinement of lithium polysulfides for high-performance lithium–sulfur batteries |
|---|---|
| المؤلفون: | Wen Liu, Qian Wang, Hailiang Wang, Yingying Mi, Jianbing Jiang, Henghui Zhou, Gary W. Brudvig |
| المصدر: | Journal of Materials Chemistry A. 5:11788-11793 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Materials science, Renewable Energy, Sustainability and the Environment, Graphene, Inorganic chemistry, Oxide, chemistry.chemical_element, 02 engineering and technology, General Chemistry, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Sulfur, Cathode, 0104 chemical sciences, law.invention, chemistry.chemical_compound, Ferrocene, chemistry, law, General Materials Science, 0210 nano-technology, Polysulfide |
| الوصف: | High-performance lithium–sulfur batteries are widely and intensively pursued, owing to their projected high energy density and low cost. However, realizing the stable cycling of a sulfur cathode with good discharging/charging rate capability under high sulfur content and high sulfur loading conditions remains a major challenge. Confining the dissolvable lithium polysulfide intermediates while addressing the intrinsic low electrical conductivity of sulfur is a key approach toward solving the problem. This work presents the design of a pomegranate-structured sulfur cathode material with high electrochemical performance. To synthesize the material, mesoporous carbon particles with ferrocene decoration are infiltrated with sulfur and then wrapped into secondary particles by dendrimer-linked graphene oxide. In the designed structure, the mesoporous carbon serves as a conductive matrix and porous host for sulfur species; ferrocene provides polar sites to bind lithium polysulfides chemically; the dendrimer-linked graphene oxide encapsulation layers further confine leaching of polysulfides and ferrocene into the electrolyte. With the three components providing triple confinement of the polysulfides, the material with a high sulfur content of 75.7 wt% exhibits excellent cycling stability and good rate capability. A capacity of 826 mA h g−1 can be delivered at 1.0C with an average decay of only 0.010% per cycle over 1200 cycles. With a high S mass loading of 4 mg cm−2, the cathode can still be cycled at 0.5C for 300 cycles with a capacity decay as low as 0.038% per cycle. |
| تدمد: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c7ta00035a |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::89cbaf3efe879d451b641e37b509f327 https://doi.org/10.1039/c7ta00035a |
| رقم الانضمام: | edsair.doi...........89cbaf3efe879d451b641e37b509f327 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
|---|---|
| DOI: | 10.1039/c7ta00035a |