Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 23, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201801010
Keywords
chemically bonding; red phosphorus; sodium-ion batteries; sulfurized polyacrylonitrile
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Funding
- National Natural Science Foundation of China [51602250]
- Thousand Youth Talents Plan Project of China
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Sodium-ion batteries are attracting increasing interests as a promising alternative to lithium-ion batteries due to the abundant resource and low cost of sodium. Despite phosphorus (P) has extremely high theoretical capacity of 2595 mAh g(-1), its wide application for sodium-ion battery is highly hampered by its fast capacity fading and low Coulombic efficiency as a result of large volume change upon cycling. Herein, a robust phosphorus anode with long cycle life for sodium-ion battery via hybridization with functional conductive polymer is presented. To this end, the polyacrylonitrile is first dehydrogenated by sulfur via a facile thermal treatment, forming a conductive main chain embedded with C-S-S moieties. This functional conductive polymer enables the formation of PS bonds between phosphorus and functional conductive matrix, leading to a robust electrode that can accommodate the large volume change upon substantial volume change in cycling. Consequently, this hybrid anode delivers a high capacity of approximate to 1300 mAh g(-1) at a current density of 520 mA g(-1) with high Coulombic efficiency (>99%) and good cycling performance (91% capacity retention after 100 cycles).
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