Journal
IONICS
Volume 25, Issue 10, Pages 4795-4803Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-03056-8
Keywords
Potassium-ion batteries; Anode material; Sn4P3 nanoparticles; Reduced graphene oxide
Funding
- National Natural Science Foundation of China [11705015]
- Foundation of Jiangsu Science and Technology Department [BA2016041]
- Science and Technology Plan Project of Suzhou [SYG201738, SZS201710]
- Scientific Research Foundation of University [XZ1628]
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Potassium-ion batteries (PIBs) have been attractedattention in grid-scale energy storage owning to the earth-abundance and low cost. However, the progresses in PIBs chemistry have so far been hindered bylacking suitable electrode materials to host the relatively large K+ ions. Herein, we report tin phosphide/reduced graphene oxide (Sn4P3/RGO) composites used as anode material for PIBs,which was prepared via a high-energy ball-milling process. The coexistence of small Sn4P3 nanoparticles and RGO nanosheets endows the composites with improved electronic conductivity, highly structural integrity and superior electrochemical performance. When used as anode material for PIBs, a high reversible capacity of 452.6 mAh g(-1) at 80 mA g(-1), superior rate capability of 116.4 mAh g(-1) at high current density of 800 mA g(-1), and still remains 157.3 mAh g(-1) at 600 mA g(-1) after 60 cycles. This work provides experimental guideline to develop suitable and advanced anode materials for PIBs.
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