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Abstract:
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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ADVANCED FUNCTIONAL MATERIALS
ISSN: 1616-301X
Year: 2018
Issue: 23
Volume: 28
1 5 . 6 2 1
JCR@2018
1 8 . 8 0 8
JCR@2020
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:182
JCR Journal Grade:4
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 66
SCOPUS Cited Count: 89
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 5
Affiliated Colleges: