One-step synthesis of α-Fe2O3–δ as promising anode materials for high performance lithium-ion batteries. (1st February 2018)

• Record Type: Journal Article
• Authors: Zeng, Peiyuan; Qian, Fangfang; Lin, Yingwu; Wang, Xiaoxiao; Li, Jianwen; Wang, Wanwan; Tao, Feng; Fang, Zhen
• Is Part Of: Materials research express. Volume 5:Number 2(2018)
• Publication Date: 2018-02-01
• Subjects: α-Fe2O3–δ -- oxygen vacancies -- hydrothermal -- long cycles -- lithium-ion batteries; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aaa8c3
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Flower-like α -Fe2 O3− δ nanostructures have been successfully synthesized via a one-step hydrothermal method. The as-prepared α -Fe2 O3− δ nanostructures exhibited a good cyclability and rate performance. The discharge capacity could retain as high as 1192.4 mAh g −1 (current density: 400 mA g −1 ) after 800 cycles, which is higher than the theoretical value of hematite. When the current density increased to 3200 mA g −1, the reversible capacity is about 660 mAh g −1 . The good electrochemical performance of α -Fe2 O3− δ nanostructures could be attributed to the combination of both nano-structuring strategy and oxygen vacancies in the as-prepared materials, which improve the structure mechanism strength, electric conductivity and facilitate the diffusion of Li ions.