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The Effect of Crystal Face of Fe 2 O 3 on the Electrochemical Performance for Lithium-ion Batteries

Scientific Reports, ISSN: 2045-2322, Vol: 6, Issue: 1, Page: 29381
2016
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Article Description

Fe 2 O 3 nanorods exposing (001) and (010) plane as well as Fe 2 O 3 nanosheets exposing (001) plane have been successfully synthesized. Fe 2 O 3 nanosheets exhibit better cycle performance and rate capabilities than that of Fe 2 O 3 nanorods. The discharge capacity of Fe 2 O 3 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 Fe 2 O 3 nanorods. In comparison with (010) plane, the (001) plane of hematite possesses larger packing density of Fe 3+ and O 2â ', which is responsible for the superior electrochemical performances of Fe 2 O 3 nanosheets than that of Fe 2 O 3 nanorods. In addition, potentiostatic intermittent titration (PITT) results show the diffusion coefficients of Li + (D Li) of Fe 2 O 3 nanosheets is higher than that of Fe 2 O 3 nanorods. The higher diffusion coefficients of Li + is favorable for the excellent lithium-storage capabilities and rate capability of Fe 2 O 3 nanosheets. Inspired by our results, we can design and synthesize Fe 2 O 3 or other electrodes with high performances according to their structure features in future.

Bibliographic Details

Chen, Minmin; Zhao, Enyue; Yan, Qingbo; Hu, Zhongbo; Xiao, Xiaoling; Chen, Dongfeng

Springer Science and Business Media LLC

Multidisciplinary

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