Multimodal Characterization of the Morphology and Functional Interfaces in Composite Electrodes for Li-S Batteries by Li Ion and Electron Beams
| Autor: | Vladimir P. Oleshko, Kevin A. Twedt, Christopher L. Soles, Jared J. Griebel, Andrew A. Herzing, Jabez J. McClelland, Jeffrey Pyun |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Ion beam Composite number Nanotechnology 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Ion law.invention law General Materials Science Nanoscopic scale Spectroscopy business.industry Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics Cathode 0104 chemical sciences Characterization (materials science) Electrode Optoelectronics 0210 nano-technology business |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 33(37) |
| ISSN: | 1520-5827 |
| Popis: | We report the characterization of multiscale 3D structural architectures of novel poly[sulfur-random-(1,3-diisopropenylbenzene)] copolymer-based cathodes for high-energy-density Li–S batteries capable of realizing discharge capacities >1000 mAh/g and long cycling lifetimes >500 cycles. Hierarchical morphologies and interfacial structures have been investigated by a combination of focused Li ion beam (LiFIB) and analytical electron microscopy in relation to the electrochemical performance and physicomechanical stability of the cathodes. Charge-free surface topography and composition-sensitive imaging of the electrodes was performed using recently introduced low-energy scanning LiFIB with Li+ probe sizes of a few tens of nanometers at 5 keV energy and 1 pA probe current. Furthermore, we demonstrate that LiFIB has the ability to inject a certain number of Li cations into the material with nanoscale precision, potentially enabling control of the state of discharge in the selected area. We show that chemical m... |
| Databáze: | OpenAIRE |
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