1. Free-Standing NiS₂ Electrode as High-Rate Anode Material for Sodium-Ion Batteries.
- Author
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Sadan MK, Kim HH, Kim C, Cho GB, Reddy NS, Cho KK, Nam TH, Kim KW, Ahn JH, and Ahn HJ
- Abstract
Owing to the speculated price hike and scarcity of lithium resources, sodium-ion batteries are attracting significant research interest these days. However, sodium-ion battery anodes do not deliver good electrochemical performance, particularly rate performance. Herein, we report the facile electrospinning synthesis of a free-standing nickel disulfide (NiS²) embedded on carbon nanofiber. This electrode did not require a conducting agent, current collector, and binder, and typically delivered high capacity and rate performance. The electrode delivered a high initial capacity of 603 mAh g
-1 at the current density of 500 mA g-1 . Moreover, the electrode delivered the capacity of 271 mAh g-1 at the high current density of 15 A g-1 . The excellent rate performance and high coulombic efficiency of the electrode were attributed to its low charge transfer resistance and unique structure.- Published
- 2020
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