Orthorhombic CaFe2O4 microrod anode for lithium-ion battery

The orthorhombic CaFe2O4 microrod has been facilely synthesized via a moderate precipitation-calcination process. Structural features and electrochemical performance of the CaFe2O4 have been investigated. When used for lithium-ion battery, the moderate surface energy of CaFe2O4 microrod is beneficial for preventing material agglomeration. CaFe2O4 microrod displays the low-temperature lithium-ion storage ability such that even when tested at -20 degrees C its reversible specific capacity gets exceeded 100 mAh g(-1) reversible specific capacity. Its room/high temperature electrochemical performance is also excellent. At the room temperature, the specific capacity contribution with 63-74%/96-98% of the first/third cycles are driven by surface controlled pseudocapacitance. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.