Mesh-structured N-doped graphene@Sb2Se3 hybrids as an anode for large capacity sodium-ion batteries

Abstract

A mesh-structured N-doped graphene@SbSe (NGS) hybrid was one-pot prepared to realize N-doping, nanostructuring and hybridization for a sodium-ion battery anode to deliver much larger reversible specific capacity, faster interfacial electron transfer rate, better ionic and electronic transport, higher rate performance and longer cycle life stability in comparison to the plain SbSe one. The better performance is ascribed to the unique intertwined porous mash-like structure associated with a strong synergistic effect of N-doped graphene for dramatic improvement of electronic and ionic conductivity by the unique porous structure, the specific capacity of graphene from N doping and fast interfacial electron transfer rate by N-doping induced surface effect and the structure-shortening insertion/desertion pathway of Na. The detail electrochemical process on the NGS electrode is proposed and analyzed in terms of the experimental results.

Alloy‐Based Anode Materials toward Advanced Sodium‐Ion Batteries

“…[128] The capacity of Sb 2 Se 3 shows no superiority to the corresponding oxides and sulfides, and it also suffers from its low electrical conductivity and abominable volume change. [130] Very impressive performance was achieved for Sb 2 Se 3 /rGO hybrid as reported by Ou et al recently (Figure 6f,g). [127] Quite recently, Zhao et al designed mesh-structured N-doped graphene@Sb 2 Se 3 hybrid with a discharge capacity of 548.6 mA h g −1 at 100 mA g −1 after 50 cycles.…”

“…[127] Quite recently, Zhao et al designed mesh-structured N-doped graphene@Sb 2 Se 3 hybrid with a discharge capacity of 548.6 mA h g −1 at 100 mA g −1 after 50 cycles. [130] Very impressive performance was achieved for Sb 2 Se 3 /rGO hybrid as reported by Ou et al recently (Figure 6f,g). [129] The Sb 2 Se 3 /rGO hybrid anode yielded a high capacity of 682, 448, and 386 mA h g −1 at the rate of 0.1, 1.0, and 2.0 A g −1 , respectively, and sustained around 417 mA h g −1 with capacity retention of 90.2% over 500 cycles at 1.0 A g −1 , as provided in Figure 6h.…”

“…[128] The capacity of Sb 2 Se 3 shows no superiority to the corresponding oxides and sulfides, and it also suffers from its low electrical conductivity and abominable volume change. [127][128][129][130][137][138][139] Luo et al fabricated ultralong Sb 2 Se 3 nanowire-based freestanding membrane anode for SIBs, which retained a capacity of 289 mA h g −1 after 50 cycles. [127] Quite recently, Zhao et al designed mesh-structured N-doped graphene@Sb 2 Se 3 hybrid with a discharge capacity of 548.6 mA h g −1 at 100 mA g −1 after 50 cycles.…”

Carbon‐Based Alloy‐Type Composite Anode Materials toward Sodium‐Ion Batteries

“…The as‐prepared electrode shows 1.6 times and 2.8 greater than pristine graphene and pure Sb 2 Se 3. This performance is completely attributed to the intertwined porous mash like structure and N‐doping . Then, Ou et al synthesized Sb 2 Se 3 @RGO composite via one‐step solvothermal route and the excellent specific capacity of 682 mAh g −1 at 0.1 A g −1 was achieved .…”

High Na+ Mobility in rGO Wrapped High Aspect Ratio 1D SbSe Nano Structure Renders Better Electrochemical Na+ Battery Performance

“…Several reports focused upon the composites of conversion‐cum‐alloying material have surfaced of late. A number of compositing strategies towards the successful performance enhancement in Sb 2 Se 3 based materials have also been reported recently . We attempt to explore the stability enhancement in Sb 2 Se 3 conversion‐cum‐alloying material synthesized by a targeted hydrothermal approach by electrochemical GITT technique.…”