title: Phosphorus-Based Alloy Materials for Advanced Potassium-Ion Battery Anode.
abstract: 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-1at 50 mA g-1and 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 diminishes the formation of dendrites during cycling, and thus Sn4P3is a relatively safe anode material, especially for application in large-scale energy storage, where large amounts of electrode materials are used. Furthermore, a possible reaction mechanism of the Sn4P3/C composite as PIB anode is proposed. This work may open up a new avenue for further development of alloy-based anodes with high capacity and long cycle life for PIBs.
authors.affiliation: Engineering Materials Institute, School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong , Wollongong, New South Wales 2500, Australia.|Institute for Superconducting & Electronic Materials, University of Wollongong , Wollongong, New South Wales 2522, Australia.
authors.forename: Wenchao
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Institute for Superconducting & Electronic Materials, University of Wollongong , Wollongong, New South Wales 2522, Australia.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Mao
authors.affiliation: School of Materials Science and Engineering, The University of New South Wales , Kensington, New South Wales 2052, Australia.
authors.forename: Sean
authors.initials: S
authors.lastname: Li
authors.affiliation: Engineering Materials Institute, School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong , Wollongong, New South Wales 2500, Australia.
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Engineering Materials Institute, School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong , Wollongong, New South Wales 2500, Australia.|Institute for Superconducting & Electronic Materials, University of Wollongong , Wollongong, New South Wales 2522, Australia.
authors.forename: Zaiping
authors.identifier: 0000-0003-3464-5301
authors.initials: Z
authors.lastname: Guo