KVPO4F as a novel insertion-type anode for potassium ion batteries

Abstract

KVPO₄F is found to be capable of both accepting and donating K ions. As an anode, it delivers a reversible capacity of over 100 mA h g⁻¹ with an average potential of 1.15 V vs. K⁺/K. The anode is also able to work in a wide temperature range of 0–55 °C.