摘要
Phosphorus sulfide cage molecule based on P4S3 was investigated for the first time as anode material for the storage of alkali metal ions(Li+, Na+, K+). Such P4S3 sample was obtained in a large scale by a simple heating reaction of low-cost rep P and S. X-ray diffraction refinement analysis indicates that P4S3 sample possesses a defect rich molecule crystal structure with S/P atom ratio of 0.74. The P4S3 anode delivered a high reversible capacity of 1266 m Ah g-1 for lithium-ion batteries at 0.1 A g-1 and good cycling performance. Experimental results demonstrated that the P4S3 anode undergoes a reversible Listorage reaction of P4S3+ 11 Li++ 11 e-←→ 0.5 Li4P2S6+ 3 Li3P during cycling. It also exhibited a high capacity of 1002 and 378 mAh g-1 at 0.1 A g-1 for Na+and K+storage, respectively. These properties suggest the promising application of P4S3 anode in high energy batteries.
基金
the Natural Science Foundation of Shandong Province(ZR2017QB017)
the Ph.D.Scientific Research Fund of Liaocheng University(No.318051406)
the Natural Science Foundation of Shandong Province(ZR2016BQ41)
the High Education Science and Technology Program of Shandong Province(J16LC03)
the Cultivation Fund of Liaocheng University(318011615)。
