ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
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
Received: 1 November 2018 Accepted: 15 November 2019
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 (FxLTO, 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, F0.2LTO 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 Fe0.2LTO, 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, Fe0.2LTO 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.
Chemical Papers 74 (5) 1495–1504 (2020)