Dataset Information

High-Performance LiF@C-Coated FeF₃·0.33H₂O Lithium-Ion Batteries with an Ionic Liquid Electrolyte.

ABSTRACT: A new lithium-ion battery cathode material of LiF@C-coated FeF₃·0.33H₂O of 20 nm primary particles and 200-500 nm secondary particles is synthesized. The redox reaction mechanisms of the new cathode material and the influence of different electrolytes on the electrochemical performance of LiF@C-coated FeF₃·0.33H₂O are investigated. We show that LiF@C-coated FeF₃·0.33H₂O using a LiFSI/Pyr_1,3 FSI ionic liquid electrolyte exhibits high reversible capacities of 330.2 and 147.6 mAh g^-1 at 200 and 3600 mA g^-1, respectively, as well as maintains high capacity over cycling. Electrochemical characterization shows that the high performance is attributed to higher electronic conductivity of the coating, continuous compensation of the loss of LiF product through the coating, higher ionic conductivity of both the coating and the electrolyte, and higher stability of the electrolyte.

SUBMITTER: Zeng C

PROVIDER: S-EPMC8756601 | biostudies-literature |

REPOSITORIES: biostudies-literature

ACCESS DATA

Similar Datasets

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

High-Performance LiF@C-Coated FeF₃·0.33H₂O Lithium-Ion Batteries with an Ionic Liquid Electrolyte.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Dataset Information

High-Performance LiF@C-Coated FeF3·0.33H2O Lithium-Ion Batteries with an Ionic Liquid Electrolyte.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

High-Performance LiF@C-Coated FeF₃·0.33H₂O Lithium-Ion Batteries with an Ionic Liquid Electrolyte.