In:
ChemElectroChem, Wiley, Vol. 8, No. 15 ( 2021-08-02), p. 2867-2880
Abstract:
The effect of incorporating the ionic liquid (IL) N‐methyl‐N‐propyl piperidinium bis(fluorosulfonyl)imide (PP 13 FSI) to a polymer electrolyte (PE) based on the polymer poly(ethylene oxide) (PEO)‐ lithium bis(fluorosulfonyl)imide (LiFSI) [PEO+20 wt.% LiFSI] is investigated. The concentration of PP 13 FSI IL is varied from 10 to 40 wt.% in the PEO+20 wt.% LiFSI system and the influences of the ionic conductivity, thermal stability, diffusion coefficient, and electrochemical stability are studied. The 40 wt.% IL containing PE shows good thermal stability ∼210 °C and high ionic conductivity, , at 40 °C with a wide electrochemical stability window ∼4.7 V vs. Li/Li + and high at 30 °C. Furthermore, the electronic conducting BiPO 4 is coated on the LiNi 0.815 Co 0.15 Al 0.035 O 2 (BiPO 4 @NCA) cathode by the liquid precipitation method. To investigate the structural and electrochemical properties of the pristine and BiPO 4 @NCA cathodes, XRD, SEM, TEM, and DSC as well as the electrochemical method are employed. The XRD results reveal a hexagonal layered structure without any impurity phase in BiPO 4 @NCA. The TEM investigations show that the BiPO 4 layer (∼10 nm) is homogeneously coated on the NCA particles. The electrochemical testing showed an improvement in the cyclic performance of BiPO 4 @NCA with a capacity retention 94.64 % after 150 cycles, which is 8 % greater than that of the pristine NCA.
Type of Medium:
Online Resource
ISSN:
2196-0216
,
2196-0216
DOI:
10.1002/celc.202100629
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2724978-5
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