Highly microporous SbPO4/BCx hybrid anodes for sodium-ion batteries

Wang, Huiqi; Gou, Li; Jing, Weifeng; An, Duo; Li, Ying; Wang, Mei; Li, Ning; Hu, Shengliang; He, Yan‐Bing

doi:10.1039/d0ma00024h

Cited by 13 publications

(12 citation statements)

References 49 publications

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“…22,26 The peak in the range of 190-193 eV is mainly attributed to the formation of B-O bonds. 22,27,28 According to the XPS survey (Fig. S1 †), the atomic concentrations of B, C, N and O are calculated and shown in Table S1.…”

Section: Resultsmentioning

confidence: 99%

Bottom-up synthesized crystalline boron quantum dots with nonvolatile memory effects through one-step hydrothermal polymerization of ammonium pentaborane and boric acid

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Bottom-up synthesized crystalline boron quantum dots with nonvolatile memory effects through one-step hydrothermal polymerization of ammonium pentaborane and boric acid

et al. 2022

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“…Figures a and S5–S7 depict the Nyquist plots of the (Si/d-MXene)@HC, d-MXene, MXene, and pure Si electrodes, in which a depressed semicircle and an inclined line can be observed. Specifically, the semicircle in the high-to-medium frequency region is ascribed to the charge transfer resistance ( R ct ) and the surface impedance, and the inclined line corresponds to the Na + diffusion. , The related kinetic parameters calculated by fitting an equivalent circuit are summarized in Table S5. The R ct value of the (Si/d-MXene)@HC electrodes with different Si contents is far lower than that of the pure Si electrode, which is in accord with the results of cycling performance shown in Figure d, further indicating the enhanced electrical conductivity and faster ion and electron transport of the (Si/d-MXene)@HC electrode.…”

Section: Resultsmentioning

confidence: 99%

“…Sodium-ion batteries have recently attracted enormous attention as a promising candidate of lithium-ion batteries (LIBs) due to the abundant resource and low cost of sodium as well as the appropriate redox potential. − It is a great challenge, however, to find a suitable Na-storage anode material with high capacity and cycle stability because of the larger ionic radius of Na + (Na + : 1.02 Å vs Li + : 0.76 Å), − resulting in lower energy output and higher volume expansion during the Na + insertion/extraction. Among many attempted anode materials of SIBs, silicon (Si) has drawn special attention because of its sizeable theoretical capacity (954 mAh g –1 , NaSi), , economical efficiency, and nontoxicity.…”

Section: Introductionmentioning

confidence: 99%

Lattice-Coupled Si/MXene Confined by Hard Carbon for Fast Sodium-Ion Conduction

Gou

Jing

Liu

et al. 2021

ACS Appl. Energy Mater.

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Silicon (Si) has been ascertained as one of the most desirable anode candidates for sodium-ion batteries (SIBs), ascribed to its sizeable theoretical capacity and abundant resource. However, the inherent electrochemical inertness of crystalline Si against sodium impedes its practical use. Herein, lattice-coupled Si nanoparticles are uniformly distributed onto delaminated MXene (d-MXene) and further tightly confined by hard carbon (HC), consequently forming a 3D cross-linked (Si/d-MXene)@HC architecture as an anode material for SIBs. Coupling a carboncoated Si anode with a conductive d-MXene matrix through the local lattice overlapping not only vastly enables the alloying reactivity of Si with Na, but also provides fast-transfer portholes for Na + and electrons because of the capacitive-like behavior of d-MXene, thus increasing the capacity and achieving fast ion conduction. The Si/d-MXene bonded with HC, constructing a robust architecture, can effectively stabilize the whole electrode structure and accommodate the volume expansion of Si upon cycling and increase capacitive-like contributions, resulting in an enhanced capacity and excellent cycle performance as anodes for SIBs. The developed electrode thus harvests favorable electrochemical performance compared to pure Si and d-MXene electrodes, such as high initial discharge capacity (370 mAh g −1 ), long cycling stability (a capacity retention above 80% after 500 cycles), and superior rate performance. The protocol to enable the sodium storage performance of Si/MXene anodes by adopting the capacitive-battery dual model would inspire rather far-ranging investigations on other advanced battery systems.

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“…30 The two samples present a characteristic D band (disordered carbon and defective graphitic structure) and a G band (ordered graphitic layers) of graphite at about 1350 and 1580 cm −1 , respectively. 31,32 Compared to MG, the purified sample (FMG) presents more narrow and intensive band profiles probably because of being free of distraction from these impurity phases and higher carbon content. The degree of disorder of graphite materials can be monitored by the integral area ratio between the D band and the G band (I D /I G ).…”

Section: Resultsmentioning

confidence: 99%

One-Step Fabrication of Fluorine-Doped Graphite Derived from a Low-Grade Microcrystalline Graphite Ore for Potassium-Ion Batteries

Zhao

Yang

et al. 2020

Energy Fuels

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Graphite has been considered as a promising anode material of potassium-ion batteries (KIBs), the practical applications of which are impeded because of the unsatisfactory cycling stability and poor rate capability. In this study, the favorable effect of fluorine-doping on the K-storage performance of graphite is demonstrated. For a more practical application, a low-grade microcrystalline graphite (MG) ore is chosen as the raw material and is purified through a facile hydrofluoric acid solution immersion method. The results indicate that the mild purification process not only results in a high purity of 98.59 wt % for MG but also realizes the effective F-corporation in the graphite host. The fluorine content of 1.02% with a high semi-ionic bond constituent (70.53%) enlarges the graphite interlayer distance from 3.356 to 3.461 Å, which contributes to an alleviated volume change and faster K-ion diffusion kinetics. Benefiting from the F-doping-induced structural improvement, the modified MG electrode exhibits a prominently elevated reversible capacity (320 mA h g −1 ), a superior cycling ability with a high capacity retention of 74.6% after 100 cycles, and an enhanced rate performance. This study manifests that F-doping is a feasible route to resolve the obstacles of graphite materials and paves the way for commercial KIBs with high performance.

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Highly microporous SbPO₄/BC_x hybrid anodes for sodium-ion batteries

Abstract: An easy route was developed to fabricate a highly microporous SbPO4/BCx hybrid anode for high-performance sodium-ion batteries.

Cited by 13 publications

References 49 publications

Bottom-up synthesized crystalline boron quantum dots with nonvolatile memory effects through one-step hydrothermal polymerization of ammonium pentaborane and boric acid

Bottom-up synthesized crystalline boron quantum dots with nonvolatile memory effects through one-step hydrothermal polymerization of ammonium pentaborane and boric acid

Lattice-Coupled Si/MXene Confined by Hard Carbon for Fast Sodium-Ion Conduction

One-Step Fabrication of Fluorine-Doped Graphite Derived from a Low-Grade Microcrystalline Graphite Ore for Potassium-Ion Batteries

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