High-rate sodium insertion/extraction into silicon oxycarbide-reduced graphene oxide

Autor:	Martin Halim, Tanzeela Fazal, Abdullah M. Al-Enizi, Shoyebmohamad F. Shaikh, Ahmad Nauman Shah Saqib, Faiza Jan Iftikhar, Rio Nugraha Putra, Ghulam Ali
Rok vydání:	2020
Předmět:	Chemistry Graphene Oxide General Chemistry Electrolyte Electrochemistry Catalysis Anode law.invention chemistry.chemical_compound Silicone Chemical engineering law Propylene carbonate Materials Chemistry Ethylene carbonate
Zdroj:	New Journal of Chemistry. 44:14035-14040
ISSN:	1369-9261 1144-0546
DOI:	10.1039/d0nj02993a
Popis:	Silicone oxycarbide (SiOC) is gaining attention as a potential anode material for lithium-ion batteries due to its higher reversible capacity and high-rate capability. However, the employment of SiOC in sodium-ion batteries (SIBs) has remained unclear. Here, the electrochemical performance of SiOC derived from phenyl-rich silicone oil and present with graphene as an anode for SIBs is investigated. 1 M NaClO4 dissolved in propylene carbonate (PC) is used as an electrolyte with and without fluorinated ethylene carbonate (FEC) and its effect on electrochemical performance has been studied. The FEC additive electrolyte shows high electrochemical performance where it delivers high charge capacities of 233, 198, 170, 103, 64, and 32 mA h g−1 compared to 218, 126, 101, 52, 27, and 10 mA h g−1 without additive at current densities of 20, 50, 100, 500, 1000, and 2000 mA g−1, respectively. The sodium diffusion coefficient in a high-performance SiOC anode with an FEC additive electrolyte is calculated to be 1.73 × 10−16 cm2 s−1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4ed34e9e9686cccf7c4b224b9a41cd9c https://doi.org/10.1039/d0nj02993a Zobrazit plný text záznamu