Hierarchical flower-like Fe2O3 mesoporous nanosheets with superior electrochemical lithium storage performance. (June 2019)

• Record Type: Journal Article
• Authors: Yang, Lifen; Wu, Yu; Wu, Yujun; Younas, Waqar; Jia, Jian; Cao, Chuanbao
• Is Part Of: Journal of energy storage. Volume 23(2019)
• Page Start: 363
• Page End: 370
• Publication Date: 2019-06
• Subjects: Fe2O3 anode -- Fe2+ self-doped -- Hierarchical mesoporous nanosheets -- Superior electrochemical performance -- Lithium ion battery; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2019.04.003
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: Microwave-assisted method to prepare Fe 2+ self-doped Fe2 O3 . Trace carbon and Fe 2+ significantly improve the electrical conductivity. The sample demonstrated superior electrochemical lithium storage performance. This strategy renders reference for diverse transition mental oxides (TMOs). Abstract: In order to satisfy the requirement of high energy density and long cyclability for lithium-ion batteries, Fe 2+ self-doped hierarchical flower-like mesoporous Fe2 O3 nanosheets with a high specific surface area of 120.57 m 2 g −1 are prepared through ultrafast microwave assisted systhesis and post calcination. The obtained Fe2 O3 exhibits a superior electrochemical performance on lithium storage (2000 mA h g -1 at 400 mA g -1 up to 300 cycles and 1750 mA h g −1 at 1 A g -1 even up to 1000 cycles) and excellent cycling stability, which are likely to be associated with the specific structure and increased electronic conductivity contributed from Fe 2+ defects. These findings not only enormously improve the electrochemical property of Fe2 O3 anode, but offer a new perspective for designing of distinctive nanomaterials for various energy devices.