Α-Fe2O3 with novel double hexagonal pyramid morphology synthesized using a dual-ion co-work system as an anode for lithium-ion batteries. Issue 36 (20th August 2019)

• Record Type: Journal Article
• Authors: Nie, Chuanhao; Deng, Yichen; Ren, Haipeng; Zhao, Yulong; Ji, Xiang; Zhu, Lei; Xing, Zheng; Liu, Jinlong; Ju, Zhicheng
• Is Part Of: CrystEngComm. Volume 21:Issue 36(2019)
• Page Start: 5508
• Page End: 5518
• Publication Date: 2019-08-20
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce00618d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : α-Fe2 O3 particles with double hexagonal pyramid morphology were synthesized via hydrothermal method in the system of coexisting NH4 + and carbonate ions CO3 2−, which was different from the previously used single-ion inducing system. Abstract : In this study, α-Fe2 O3 particles with novel double hexagonal pyramid morphology were synthesized via a facile hydrothermal method in a rare system of coexisting ammonium ions (NH 4+ ) and carbonate ions (CO3 2− ), which was different from the previously used single-ion inducing system. A series of experimental results indicated that the synergistic effects of NH 4+ and CO3 2− played a decisive role in the formation process of α-Fe2 O3 particles with the unique morphology, and the formation mechanism was attributed to the oriented aggregation and Ostwald ripening process. When utilized as anode materials for LIBs, the α-Fe2 O3 particles with the double hexagonal pyramid morphology exhibited the excellent cycling stability of 700 mA h g −1 after 100 charge/discharge cycles with the high coulombic efficiency of 98% starting from the 25th cycle; this indicated that these particles could be a promising alternative anode for LIBs.