Dataset Information

Absorption of Sulfur Dioxide by Tetraglyme?Sodium Salt Ionic Liquid.

ABSTRACT: A series of tetraglyme?sodium salt ionic liquids have been prepared and found to be promising solvents to absorb SO?. The experiments here show that [Na?tetraglyme][SCN] ionic liquid has excellent thermal stability and a 30% increase in SO? absorption capacity compared to other sodium salt ionic liquids and the previously studied lithium salt ionic liquids in terms of molar absorption capacity. The interaction between SO? and the ionic liquid was concluded to be physical absorption by IR and NMR.

SUBMITTER: Xu Q

PROVIDER: S-EPMC6384689 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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Absorption of Sulfur Dioxide by Tetraglyme⁻Sodium Salt Ionic Liquid.

Xu Qiang Q Jiang Wei W Xiao Jianbai J Wei Xionghui X

Molecules (Basel, Switzerland) 20190126 3

A series of tetraglyme⁻sodium salt ionic liquids have been prepared and found to be promising solvents to absorb SO₂. The experiments here show that [Na⁻tetraglyme][SCN] ionic liquid has excellent thermal stability and a 30% increase in SO₂ absorption capacity compared to other sodium salt ionic liquids and the previously studied lithium salt ionic liquids in terms of molar absorption capacity. The interaction between SO₂ and the ionic liquid was concluded to be physical absorption by IR and NMR ...[more]

PMID: 30691089

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Project description:With the development of mobile electronic devices, there are more and more requirements for high-energy storage equipment. Traditional lithium-ion batteries, like lithium-iron phosphate batteries, are limited by their theoretical specific capacities and might not meet the requirements for high energy density in the future. Lithium-sulfur batteries (LSBs) might be ideal next-generation energy storage devices because they have nearly 10 times the theoretical specific capacities of lithium-ion batteries. However, the severe capacity decay of LSBs limits their application, especially at high currents. In this study, an ionic liquid (IL) electrolyte additive, TDA+TFSI, was reported. When 5% of the TDA+TFSI additive was added to a traditional ether-based organic electrolyte, the cycling performance of the LSBs was significantly improved compared with that of the LSBs with the pure traditional organic electrolyte. At a rate of 0.5 C, the discharge specific capacity in the first cycle of the LSBs with the 5% TDA+TFSI electrolyte additive was 1167 mAh g-1; the residual specific capacities after 100 cycles and 300 cycles were 579 mAh g-1 and 523 mAh g-1, respectively; and the average capacity decay rate per cycle was only 0.18% in 300 cycles. Moreover, the electrolyte with the TDA+TFSI additive had more obvious advantages than the pure organic ether-based electrolyte at high charge and discharge currents of 1.0 C. The residual discharge specific capacities were 428 mAh g-1 after 100 cycles and 399 mAh g-1 after 250 cycles, which were 13% higher than those of the LSBs without the TDA+TFSI additive. At the same time, the Coulombic efficiencies of the LSBs using the TDA+TFSI electrolyte additive were more stable than those of the LSBs using the traditional organic ether-based electrolyte. The results showed that the LSBs with the TDA+TFSI electrolyte additive formed a denser and more uniform solid electrolyte interface (SEI) film during cycling, which improved the stability of the electrochemical reaction.

Dataset Information

Absorption of Sulfur Dioxide by Tetraglyme?Sodium Salt Ionic Liquid.

Publications

Absorption of Sulfur Dioxide by Tetraglyme⁻Sodium Salt Ionic Liquid.

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