ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Enhanced electrochemical performance of Fe-doping Li₄Ti₅O₁₂ anode material for energy storage device

Jing-Rui Kang, Gui-Xia Dong, Zong-Feng Li, and Lei Li

College of Materials Science and Engineering, North China University of Science and Technology, Tangshan, China

E-mail: dgx6608@126.com

Received: 1 November 2018  Accepted: 15 November 2019

Abstract:

In this study, we report a higher electrochemical performances of Li₄Ti₅O₁₂ (LTO) anode material via solid method, then adding different contents of Fe₂O₃ into LTO (F_xLTO, x = 0.1, 0.2, 0.3, 0.4) secondary calcined. The study shows that pure LTO holds the highest electrochemical performances at 750 °C. Additionally, F_0.2LTO demonstrates an outstanding discharge capacity of 251.9 mAh g⁻¹ at 20 mA g⁻¹ for lithium ion batteries; even cycled at 100 mA g⁻¹ for 100 times, a capacity of 192.1 mAh g⁻¹ retains. Particularly, the specific capacitance of Fe_0.2LTO, with higher surface area of 28.4937 m² g⁻¹ and pore volume of 0.4187 ml g⁻¹, reaches 65.17, 46.56, 26.71, 19.32 F g⁻¹ at 50, 100, 500, 1000 mA g⁻¹ for hybrid capacitors, respectively. Even cycled at 50 mA g⁻¹ for 500 times, a capacitance of 20.18 F g⁻¹ retains. Obviously, Fe_0.2LTO demonstrates the remarkable electrochemical performances than LTO for lithium ion batteries and hybrid capacitors. Therefore, Fe-doping LTO has enhanced electrochemical performance as anode material for energy storage device.

Keywords: Li4Ti5O12; Fe-doping Li4Ti5O12; Specific surface area; Electrochemical performance

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-01002-6

Chemical Papers 74 (5) 1495–1504 (2020)