首页|Hollow FeS2 nanospheres encapsulated in N/S co-doped carbon nanofibers as electrode material for electrochemical energy storage
Hollow FeS2 nanospheres encapsulated in N/S co-doped carbon nanofibers as electrode material for electrochemical energy storage
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NSTL
Elsevier
? 2022 Elsevier B.V.Pyrite iron sulfide (FeS2) is a fascinating electrode material for energy reserve devices because of its high theoretical capacity, non-polluting nature and abundant resources. However, the practical application has been extremely inhibited owing to its poor rate capacity and short cyclability caused by volume change during charge/discharge processes. In this article, a novel nanocomposite that is hollow FeS2 nanospheres encapsulated in N/S co-doped carbon nanofibers (FeS2CNFs) was synthesized through electrostatic spinning. The FeS2CNFs nanocomposite demonstrates a terrific specific capacity of 511 F g?1 at 1 A g?1 for all-solid-state supercapacitors. The FeS2CNFs as electrode material for sodium-ion batteries (SIB) displays a specific capacity of 827.7 mAh g?1 and possesses a capacity of 490.6 mAh g?1 at 0.05 A g?1 after 200 cycles. The results indicate that this encapsulated structure can guarantee the integrity of electrode materials. And the abundant defects in carbon nanofibers caused by N/S co-doping may increase electrochemical reaction sites to facilitate charge transfer. The N/S co-doped FeS2CNFs nanocomposite exhibits a great potential for applying in SIB and supercapacitors.
Electrostatic spinningEncapsulated structureFeS2Sodium ion batteriesSupercapacitors
Yin Y.、Zhang Y.、Lu J.、Huang Y.、Zhao H.、Bao S.
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Research Center for Corrosion and Erosion Process Control of Equipment and Material in Marine Harsh Environment Guangzhou Maritime University
School of Materials and Metallurgy University of Science and Technology Liaoning Anshan
NSTL
Elsevier
