title: The Effect of Crystal Face of Fe2O3 on the Electrochemical Performance for Lithium-ion Batteries.
abstract: Fe2O3 nanorods exposing (001) and (010) plane as well as Fe2O3 nanosheets exposing (001) plane have been successfully synthesized. Fe2O3 nanosheets exhibit better cycle performance and rate capabilities than that of Fe2O3 nanorods. The discharge capacity of Fe2O3 nanosheets can stabilize at 865 mAh/g at the rate of 0.2 C (1C = 1000 mA/g) and 570 mAh/g at the rate of 1.2 C after 80 cycles, which increased by 90% and 79% compared with 456 mAh/g and 318 mAh/g of Fe2O3 nanorods. In comparison with (010) plane, the (001) plane of hematite possesses larger packing density of Fe(3+) and O(2-), which is responsible for the superior electrochemical performances of Fe2O3 nanosheets than that of Fe2O3 nanorods. In addition, potentiostatic intermittent titration (PITT) results show the diffusion coefficients of Li(+) (DLi) of Fe2O3 nanosheets is higher than that of Fe2O3 nanorods. The higher diffusion coefficients of Li(+) is favorable for the excellent lithium-storage capabilities and rate capability of Fe2O3 nanosheets. Inspired by our results, we can design and synthesize Fe2O3 or other electrodes with high performances according to their structure features in future.
authors.affiliation: 1College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Minmin
authors.initials: M
authors.lastname: Chen
authors.affiliation: 1College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Enyue
authors.initials: E
authors.lastname: Zhao
authors.affiliation: 1College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Yan
authors.affiliation: 1College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Zhongbo
authors.initials: Z
authors.lastname: Hu
authors.affiliation: 1College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Xiao
authors.affiliation: China Institute of Atomic Energy, Beijing 102413, P. R. China.
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Chen