Triple-Layered Carbon-SiO2 Composite Membrane for High Energy Density and Long Cycling Li–S Batteries
| Autor: | Xiangcun Li, Guihua Yu, Gaohong He, Yan Dai, Xiaopeng Zhang, Wenji Zheng, Shaoran Yang, Yang Liu, Wei Kou, Xiaobin Jiang |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science General Engineering General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur Cathode 0104 chemical sciences law.invention Membrane Adsorption chemistry Chemical engineering law General Materials Science 0210 nano-technology Porosity Phase inversion |
| Zdroj: | ACS Nano. 13:5900-5909 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | Here we report a highly scalable yet flexible triple-layer structured porous C/SiO2 membrane via a facile phase inversion method for advancing Li–sulfur battery technology. As a multifunctional current-collector-free cathode, the conductive dense layer of the C/SiO2 membrane offers hierarchical macropores as an ideal sulfur host to alleviate the volume expansion of sulfur species and facilitate ion/electrolyte transport for fast kinetics, as well as spongelike pores to enable high sulfur loading. The triple-layer structured membrane cathode enables the filling of most sulfur species in the macropores and additional loading of a thin sulfur slurry on the membrane surface, which facilitates ion/electrolyte transport with faster kinetics than the conventional S/C slurry-based cathode. Furthermore, density functional theory simulations and visual adsorption measurements confirm the critical role of the doped SiO2 nanoparticles (∼10 nm) in the asymmetric C membrane in suppressing the shuttle effect of polysulf... |
| Databáze: | OpenAIRE |
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