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Electrochemical Performance of Orthorhombic CsPbI3 Perovskite in Li-Ion Batteries
- Source :
- Materials, Vol 14, Iss 5718, p 5718 (2021), Materials, Volume 14, Issue 19
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- A facile solution process was employed to prepare CsPbI3 as an anode material for Li-ion batteries. Rietveld refinement of the X-ray data confirms the orthorhombic phase of CsPbI3 at room temperature. As obtained from bond valence calculations, strained bonds between Pb and I are identified within PbI6 octahedral units. Morphological study shows that the as-prepared δ-CsPbI3 forms a nanorod-like structure. The XPS analysis confirm the presence of Cs (3d, 4d), Pb (4d, 4f, 5d) and I (3p, 3d, 4d). The lithiation process involves both intercalation and conversion reactions, as confirmed by cyclic voltammetry (CV) and first-principles calculations. Impedance spectroscopy coupled with the distribution function of relaxation times identifies charge transfer processes due to Li metal foil and anode/electrolyte interfaces. An initial discharge capacity of 151 mAhg−1 is found to continuously increase to reach a maximum of ~275 mAhg−1 at 65 cycles, while it drops to ~240 mAhg−1 at 75 cycles and then slowly decreases to 235 mAhg−1 at 100 cycles. Considering the performance and structural integrity during electrochemical performance, δ-CsPbI3 is a promising material for future Li-ion battery (LIB) application.
- Subjects :
- Battery (electricity)
Technology
Microscopy
QC120-168.85
Materials science
Rietveld refinement
QH201-278.5
Analytical chemistry
Electrolyte
Engineering (General). Civil engineering (General)
TK1-9971
Anode
Dielectric spectroscopy
n/a
Descriptive and experimental mechanics
General Materials Science
Orthorhombic crystal system
Electrical engineering. Electronics. Nuclear engineering
TA1-2040
Cyclic voltammetry
Perovskite (structure)
Subjects
Details
- ISSN :
- 19961944
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....0d7ddcdc0bf5500793a1a74ac17041b8
- Full Text :
- https://doi.org/10.3390/ma14195718