2021
DOI: 10.1007/s12613-021-2286-2
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Ultrafine nano-scale Cu2Sb alloy confined in three-dimensional porous carbon as an anode for sodium-ion and potassium-ion batteries

Abstract: Ultrafine nano-scale Cu 2 Sb alloy confined in a three-dimensional porous carbon was synthesized using NaCl template-assisted vacuum freeze-drying followed by high-temperature sintering and was evaluated as an anode for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). The alloy exerts excellent cycling durability (the capacity can be maintained at 328.3 mA•h•g −1 after 100 cycles for SIBs and 260 mA•h•g −1 for PIBs) and rate capability (199 mA•h•g −1 at 5 A•g −1 for SIBs and 148 mA•h•g −1 at 5 A… Show more

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Cited by 14 publications
(5 citation statements)
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“…It maintains 328.3 mAh g -1 after 100 cycles with a rate capability of 199 mAh g -1 at 5 A g -1 due to the smooth electron transport path. Cu is also a promising inactive component to make alloy with Sn for improving the functional characteristics [130]. Nanosized CoSb alloy confined to honeycomb carbon framework has a remarkable cycling durability of 211.2 mAh g -1 after 500 cycles with a rate capability of 144 mAh g -1 at 5 A g -1 .…”
Section: Three-dimensional Hierarchical Carbonmentioning
confidence: 99%
“…It maintains 328.3 mAh g -1 after 100 cycles with a rate capability of 199 mAh g -1 at 5 A g -1 due to the smooth electron transport path. Cu is also a promising inactive component to make alloy with Sn for improving the functional characteristics [130]. Nanosized CoSb alloy confined to honeycomb carbon framework has a remarkable cycling durability of 211.2 mAh g -1 after 500 cycles with a rate capability of 144 mAh g -1 at 5 A g -1 .…”
Section: Three-dimensional Hierarchical Carbonmentioning
confidence: 99%
“…[7] At present, many methods have been proposed to improve the cycling stability of Sb through the design of favorable nanoarchitectures and alloying. In general, various nanostructures of Sb (Sb/C nanofibers, [8] Sb nanotubes, [9] Sb nanorod array, [10] hollow Sb, [11] porous Sb, [12] and few-layered Sb [13] ) can relieve the stress by providing expansion space within the nanostructure, while Sb-based alloys (CoSb, [14] NiSb, [15] SnSb, [16] Cu 2 Sb, [17] FeSb 2 , [18] AlSb, [19] Mo 3 Sb 7 , [20] Zn 4 Sb 3 , [21] BiSb, [22] and Sb 2 Se 3 [23] ) can reduce the volume expansion by decreasing the reversible capacity through the addition of inert components in Sb. [24] For example, Sb hollow microspheres exhibited a capacity retention of 97.2 % after 100 cycles due to the buffering effect of the hollow structure, [25] which could accommodate the volume change during the sodiation and desodiation process.…”
Section: Introductionmentioning
confidence: 99%
“…Herein, we presented a systematic analysis of the anode properties of various Sb-based alloy electrodes, including AlSb, Cu 2 Sb FeSb, Fe 2 Sb, InSb, LaSb, SmSb, SnSb, and YSb, in an ionic-liquid electrolyte. Although the anodic properties of Cu 2 Sb, FeSb, Fe 2 Sb, InSb, LaSb, and SnSb electrodes have been previously reported, they mainly focused on the properties in the organic-solvent-based electrolytes, leaving the characteristics in ionic-liquid electrolytes unclear. Considering the higher reactivity of alkali metals with increasing atomic number, using flame-retardant ionic-liquid electrolytes becomes desirable for KIBs. Therefore, we used an ionic-liquid electrolyte composed of potassium bis­(fluorosulfonyl)­amide (KFSA) dissolved in N -methyl- N -propylpyrrolidinium bis­(fluorosulfonyl)­amide (Py13–FSA or [C 3 C 1 pyrr]­[FSA]).…”
Section: Introductionmentioning
confidence: 99%