期刊
MATERIALS
卷 14, 期 19, 页码 -出版社
MDPI
DOI: 10.3390/ma14195718
关键词
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类别
资金
- Executive Yuan through its Forward-Looking Research Grant [110-0210-04-20-01]
- Ministry of Science and Technology (MOST) of Taiwan [109-2811-E-027-506]
A facile solution process was used to prepare CsPbI3 as an anode material for Li-ion batteries. The material showed promising performance and structural integrity during electrochemical testing, indicating its potential for future LIB applications.
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 delta-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 similar to 275 mAhg(-1) at 65 cycles, while it drops to similar 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, b-CsPbI3 is a promising material for future Li-ion battery (LIB) application.
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