Lifetime vs. rate capability: Understanding the role of FEC and VC in high-energy Li-ion batteries with nano-silicon anodes
| Autor: | Juan Balach, Marco Fritsch, Tony Jaumann, Markus Klose, Ralf Hauser, Lars Giebeler, Jürgen Eckert, Valerij Teltevskij, Viktar Sauchuk, Alexander Michaelis, Guenter Stephani, Steffen Oswald, U. Langklotz, Daria Mikhailova |
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| Rok vydání: | 2017 |
| Předmět: |
LI-ION BATTERY
Materials science Silicon Físico-Química Ciencia de los Polímeros Electroquímica Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences law.invention purl.org/becyt/ford/1 [https] law Silicon anode purl.org/becyt/ford/1.4 [https] Li-ion battery General Materials Science FEC Renewable Energy Sustainability and the Environment Ciencias Químicas 333.7 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode Dielectric spectroscopy chemistry Chemical engineering VC Electrode Degradation (geology) 0210 nano-technology Carbon CIENCIAS NATURALES Y EXACTAS SILICON ANODE |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 2405-8297 |
| DOI: | 10.1016/j.ensm.2016.08.002 |
| Popis: | Fluoroethylene carbonate (FEC) and vinylene carbonate (VC) are the most frequently used electrolyte components to enhance the lifetime of anode materials in Li-ion batteries, but for silicon it is still ambiguous when FEC or VC is more beneficial. Herein, a nanostructured silicon/carbon anode derived from low-cost HSiCl3 is tailored by the rational choice of the electrolyte component, to obtain an anode material outperforming current complex silicon structures. We demonstrate highly reversible areal capacities of up to 5 mA h/cm2 at 4.4 mg/cm2 mass loading, a specific capacity of 1280 mA h/gElectrode, a capacity retention of 81% after 500 deep-discharge cycles versus lithium metal and successful full-cell tests with high-voltage cathodes meeting the requirements for real application. Electrochemical impedance spectroscopy and post-mortem investigation provide new insights in tailoring the interfacial properties of silicon-based anodes for high performance anode materials based on an alloying mechanism with large volume changes. The role of fluorine in the FEC-derived interfacial layer is discussed in comparison with the VC-derived layer and possible degradation mechanisms are proposed. We believe that this study gives a valuable understanding and provides new strategies on the facile use of additives for highly reversible silicon anodes in Li-ion batteries. Fil: Jaumann, Tony. Ifw Dresden; Alemania Fil: Balach, Juan Manuel. Ifw Dresden; Alemania Fil: Langklotz, Ulrike. Technische Universität Dresden; Alemania Fil: Sauchuk, Viktar. Fraunhofer Institute for Ceramic Materials and Systems; Alemania Fil: Fritsch, Marco. Fraunhofer Institute for Ceramic Materials and Systems; Alemania Fil: Michaelis, Alexander. Technische Universität Dresden; Alemania Fil: Teltevskij, Valerij. Leibniz Institute for Solid State and Materials Research; Alemania Fil: Mikhailova, Daria. Leibniz Institute for Solid State and Materials Research; Alemania Fil: Oswald, Steffen. Leibniz Institute for Solid State and Materials Research; Alemania Fil: Klose, Markus. Leibniz Institute for Solid State and Materials Research; Alemania. Technische Universität Dresden; Alemania Fil: Stephani, Guenter. Branch Lab Dresden. Fraunhofer Institute for Manufacturing Technology and Advanced Materials; Argentina Fil: Hauser, Ralf. Branch Lab Dresden. Fraunhofer Institute for Manufacturing Technology and Advanced Materials; Argentina Fil: Eckert, Jürgen. Technische Universität Dresden; Alemania. Leibniz Institute for Solid State and Materials Research; Alemania Fil: Giebeler, Lars. Leibniz Institute for Solid State and Materials Research; Alemania. Technische Universität Dresden; Alemania |
| Databáze: | OpenAIRE |
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