Chemical Sulfide Tethering Improves Low-Temperature Li–S Battery Cycling

Autor:	José C. Díaz, Avery E. Baumann, V. Sara Thoi, Kevin J. Bennett, David A. Burns
Rok vydání:	2021
Předmět:	Battery (electricity) Materials science fungi chemistry.chemical_element Nanotechnology Electrochemistry Energy storage Electrochemical cell chemistry.chemical_compound chemistry General Materials Science Metal-organic framework Lithium Polarization (electrochemistry) Polysulfide
Zdroj:	ACS Applied Materials & Interfaces. 13:50862-50868
ISSN:	1944-8252 1944-8244
Popis:	Demands for energy storage and delivery continue to rise worldwide, making it imperative that reliable performance is achievable in diverse climates. Lithium-sulfur (Li-S) batteries offer a promising alternative to lithium-ion batteries owing to their substantially higher specific capacity and energy density. However, improvements to Li-S systems are still needed in low-temperature environments where polysulfide clustering and solubility limitations prohibit complete charge/discharge cycles. We address these issues by introducing thiophosphate-functionalized metal-organic frameworks (MOFs), capable of tethering polysulfides, into the cathode architecture. Compared to cells with the parent MOFs, cells containing the functionalized MOFs exhibit greater capacity delivery and decreased polarization for a range of temperatures down to -10 °C. We conduct thorough electrochemical analyses to ascertain the origins of performance differences and report an altered Li-S redox mechanism enabled by the thiophosphate moiety. This investigation is the first low-temperature Li-S study using MOF additives and represents a promising direction in enabling energy storage in extreme environments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d137ba9324dc95bcffc75f185d3fb2dc https://doi.org/10.1021/acsami.1c12129 Zobrazit plný text záznamu