Minimizing the electrolyte volume in Li–S batteries: a step forward to high gravimetric energy density
| Autor: | Hee Min Kim, Yang-Kook Sun, Sergio Brutti, Jang Yeon Hwang, Aleksandar Matic, Marco Agostini, Pantaleone Bruni, Fausto Croce |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Battery (electricity)
Advanced Energy Materials Materials science nanostructured sulfide/fiber electrodes Li-ion batteries chemistry.chemical_element 02 engineering and technology Electrolyte Electrochemistry 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law General Materials Science lithium–sulfur battery with reduced electrolyte volume Li–ion batteries low cost lithium batteries practical and high energy storage systems Renewable Energy Sustainability and the Environment Materials Science (all) Composite material Polysulfide Carbon nanofiber 010405 organic chemistry 021001 nanoscience & nanotechnology lithium-sulfur battery with reduced electrolyte volume Cathode Anode 0104 chemical sciences chemistry Chemical engineering Volume (thermodynamics) Energy density Gravimetric analysis Lithium 0210 nano-technology |
| Zdroj: | Advanced energy materials (Internet) (2018). doi:10.1002/aenm.201801560 info:cnr-pdr/source/autori:Agostini M.; Hwang J.-Y.; Kim H.M.; Bruni P.; Brutti S.; Croce F.; Matic A.; Sun Y.-K./titolo:Minimizing the Electrolyte Volume in Li-S Batteries: A Step Forward to High Gravimetric Energy Density/doi:10.1002%2Faenm.201801560/rivista:Advanced energy materials (Internet)/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume |
| DOI: | 10.1002/aenm.201801560 |
| Popis: | Sulfur electrodes confined in an inert carbon matrix show practical limitations and concerns related to low cathode density. As a result, these electrodes require a large amount of electrolyte, normally three times more than the volume used in commercial Li-ion batteries. Herein, a high-energy and high-performance lithium-sulfur battery concept, designed to achieve high practical capacity with minimum volume of electrolyte is proposed. It is based on deposition of polysulfide species on a self-standing and highly conductive carbon nanofiber network, thus eliminating the need for a binder and current collector, resulting in high active material loading. The fiber network has a functionalized surface with the presence of polar oxygen groups, with the aim to prevent polysulfide migration to the lithium anode during the electrochemical process, by the formation of S-O species. Owing to the high sulfur loading (6 mg cm-2) and a reduced free volume of the sulfide/fiber electrode, the Li-S cell is designed to work with as little as 10 µL cm-2 of electrolyte. With this design the cell has a high energy density of 450 Wh kg-1, a lifetime of more than 400 cycles, and the possibility of low cost, by use of abundant and eco-friendly materials. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| Databáze: | OpenAIRE |
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