Electrodeposited Binder-Free Antimony−Iron−Phosphorous Composites as Advanced Anodes for Sodium-Ion Batteries
RIS ID
140205
Abstract
The limited availability and rising cost of lithium have motivated research into sodium as an alternative ion for rechargeable batteries. However, anode development for such sodium-ion batteries (SIBs) has advanced slowly. Herein, novel binder-free ternary Sb−Fe−P composites were synthesized through a controllable electrodeposition method and were examined as prospective anode materials for sodium-ion batteries (SIBs). The Sb47Fe39P14 electrode exhibited a high desodiation capacity of 431.4 mA h g−1 at 100 mA g−1 with a capacity retention of 97.8% during the 200th cycle. Further, this anode delivered a high rate capacity (245.8 mA h g−1 at 2000 mA g−1). The promising Na-ion storage, cycle and rate performance of the Sb47Fe39P14 electrode are mainly ascribed to the synergistic effect of its microstructure and active/inactive metal matrix. A kinetics investigation revealed that the rate capability of the Sb47Fe39P14 electrode can be attributed to the combination of primary pseudocapacitive and secondary solid-state diffusion contributions. The results of this study should enable the development of a controllable, scalable electrodeposition strategy and help explore other metallic composites with excellent lifespans and high rate capabilities for practical SIB applications.
Publication Details
Rong, W., You, J., Zheng, X., Tu, G., Tao, S., Zhang, P., Wang, Y. & Li, J. (2019). Electrodeposited Binder-Free Antimony−Iron−Phosphorous Composites as Advanced Anodes for Sodium-Ion Batteries. ChemElectroChem, 6 (21), 5420-5427.