Highly flexible free-standing Sb/Sb₂O₃@N-doped carbon nanofiber membranes for sodium ion batteries with excellent stability

Abstract

Sb and Sb2O3 are attractive anode materials for sodium ions batteries due to their relatively low cost and high theoretical capacity. However, the poor cycling stability caused by the serious...

Sb2O3 nanoparticles anchored on N-doped graphene nanoribbons as improved anode for sodium-ion batteries

“…The Sb 2 O 3 /N-GNR nanocomposite showed a homogeneous distribution of Sb 2 O 3 nanoparticles on N-GNR, leading to a good rate capability at a current density between 0.1 and 5 A g À1 along with excellent cycling performance under continuous charge/discharge. It delivered a reversible specic capacity of 642 mA h g À1 aer 100 cycles at 0.1 A g À1 , which is signicantly higher than that reported by Li et al 28 Without N-doping, the value obtained for the control sample was 535 mA h g À1 under similar conditions. Moreover, Sb 2 O 3 /N-GNR exhibited a stable cycle performance of 405 mA h g À1 aer 500 cycles at 5 A g À1 , demonstrating that upon N-doping of GNR the enhancement of Na storage kinetics is achieved.…”

“…26 Great progress has been made to further improve the anode materials for SIBs by combining the merits of doped-carbon nanostructures with conversion-alloying type oxides and chalcogenides (Sn, Sb and Ge). [27][28][29][30] Especially, Sb 2 O 3 has demonstrated appropriate electrochemical performance in SIBs due to its high reactivity with Na ions, i.e., Sb 2 O 3 reacts with 10 sodium ions per mole, delivering a theoretical specic capacity 1103 mA h g À1 . 27 Recently, Li et al 28 reported a Sb/Sb 2 O 3 nanoparticles anchored on 1D N-doped carbon nanober membranes synthesized by electrospinning method and carbon thermal reduction.…”

“…[27][28][29][30] Especially, Sb 2 O 3 has demonstrated appropriate electrochemical performance in SIBs due to its high reactivity with Na ions, i.e., Sb 2 O 3 reacts with 10 sodium ions per mole, delivering a theoretical specic capacity 1103 mA h g À1 . 27 Recently, Li et al 28 reported a Sb/Sb 2 O 3 nanoparticles anchored on 1D N-doped carbon nanober membranes synthesized by electrospinning method and carbon thermal reduction. The obtained composite anodes in SIBs delivered a reversible specic capacity of 527.3 mA h g À1 aer 100 cycles at a current density of 0.1 A g À1 .…”

Two-dimensional SnO2 anchored biomass-derived carbon nanosheet anode for high-performance Li-ion capacitors

“… 47,48 The intrinsic nitrogen doping derived from biomass precursor can tailor the intrinsic electron state of SnO 2 /PCN, narrow the bandgap of SnO 2 , thus further enhance the electron conductivity as well as shorten path of Li + diffusion. 49,50 …”

“…47,48 The intrinsic nitrogen doping derived from biomass precursor can tailor the intrinsic electron state of SnO 2 /PCN, narrow the bandgap of SnO 2 , thus further enhance the electron conductivity as well as shorten path of Li + diffusion. 49,50 The evolution of SSA and porosity for SnO 2 and SnO 2 /PCN were measured by nitrogen adsorption/desorption isotherms analysis. Fig.…”