Phosphorus-Based Alloy Materials for Advanced Potassium-Ion Battery Anode

Potassium-ion batteries (PIBs) are interesting as one of the alternative metal-ion battery systems to lithium-ion batteries (LIBs) due to the abundance and low cost of potassium. We have herein investigated Sn4P3/C composite as a novel anode material for PIBs. The electrode delivered a reversible capacity of 384.8 mA h g–1 at 50 mA g–1 and a good rate capability of 221.9 mA h g–1, even at 1 A g–1. Its electrochemical performance is better than any anode material reported so far for PIBs. It was also found that the Sn4P3/C electrode displays a discharge potential plateau of 0.1 V in PIBs, slightly higher than for sodium-ion batteries (SIBs) (0.01 V), and well above the plating potential of metal. This…

• UO
  University of Wollongong
• AR
  Australian Research Council

  Award: DP170102406