Morphological and chemical tuning of lead halide perovskite mesocrystals as long-life anode materials in lithium-ion batteries

• Published in: CrystEngComm Vol. 21; no. 6; pp. 1048 - 1059
• Main Authors: Wang, Qun, Yang, Tao, Wang, Huanhuan, Zhang, Jianlong, Guo, Xinmin, Yang, Zhen, Lu, Songtao, Qin, Wei
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 2019
• Subjects: Anodes; Charge transfer; Chemical composition; Electrochemical analysis; Electrode materials; Grain boundaries; Lithium-ion batteries; Microcrystals; Morphology; Organic chemistry; Perovskites; Rechargeable batteries; Tuning; X ray photoelectron spectroscopy
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/C8CE01779D

Five methylammonium lead bromide (MAPbBr 3 ) microcrystals with different sizes (∼2.9 mm, ∼2.4 mm, ∼1.9 mm, ∼1.5 mm and ∼1.2 mm), were successfully designed using a facile solvothermal method through tuning the concentration of Pb precursors. The morphology, micro/nanostructure, and chemical composition of these MAPbBr 3 crystals are characterized in detail by SEM, XPS, FTIR, PL, TG/DSC, and Hall measurements. The influences of the microstructures involving the defect and grain boundaries on the performance evolution for Li-ion batteries were studied. 3 samples with big, medium, and small sizes (2.9, 1.9 and 1.2 mm) were selected to investigate their electrochemical performance. Interestingly, the MAPbBr 3 anodes showed size-dependent electrochemical performance. More importantly, this is the first report stating that excellent cycling stability for 1000 cycles of MAPbBr 3 anodes composed of small sized samples should be attributed to the small size, low defect concentration structure and good interface charge transfer.