S-doped carbon@TiO2 to store Li+/Na+ with high capacity and long life-time

Chen, Changmiao; Yang, Yaqian; Ding, Shuangshuang; Wei, Zengxi; Tang, Xuan; Li, Pengchao; Wang, Taihong; Cao, Guozhong; Zhang, Ming

doi:10.1016/j.ensm.2018.01.015

Cited by 57 publications

(31 citation statements)

References 59 publications

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“…These phenomena indicate that the S‐doped carbon benefits from the Na + storage and it is electrochemically active. In addition, the broad peaks below 1 V and the peak close to 0 V can be indexed to the sodiation/desodiation of TiO 2 and carbon . Moreover, the CV curve of the CNF‐S@TiO 2 ‐5‐Ar sample presents similar peak voltages (Figure S9a, Supporting Information), showing an electrochemical behavior similar to the CNF‐S@TiO 2 ‐5 anode material.…”

Section: Resultsmentioning

confidence: 79%

“…This analysis proves that the presence of ultrasmall TiO 2 in the S‐doped carbon nanofibers significantly enhances the specific surface area and improves the number of pores, especially in the microporous volume. The previous report indicated that the porosity, particularly for heteroatom‐doped carbon materials, promotes the surface ion storage properties (capacitive effect) to provide additional capacity . More details are presented in the later sections.…”

Section: Resultsmentioning

confidence: 86%

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S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO₂ for Na⁺/Li⁺ Storage with High Capacity and Long‐Time Stability

Chen

Wang

et al. 2019

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Building a rechargeable battery with high capacity, high energy density, and long lifetime contributes to the development of novel energy storage devices in the future. Although carbon materials are very attractive anode materials for lithium‐ion batteries (LIBs), they present several deficiencies when used in sodium‐ion batteries (SIBs). The choice of an appropriate structural design and heteroatom doping are critical steps to improve the capacity and stability. Here, carbon‐based nanofibers are produced by sulfur doping and via the introduction of ultrasmall TiO2 nanoparticles into the carbon fibers (CNF‐S@TiO2). It is discovered that the introduction of TiO2 into carbon nanofibers can significantly improve the specific surface area and microporous volume for carbon materials. The TiO2 content is controlled to obtain CNF‐S@TiO2‐5 to use as the anode material for SIBs/LIBs with enhanced electrochemical performance in Na+/Li+ storage. During the charge/discharge process, the S‐doping and the incorporation of TiO2 nanoparticles into carbon fibers promote the insertion/extraction of the ions and enhance the capacity and cycle life. The capacity of CNF‐S@TiO2‐5 can be maintained at ≈300 mAh g−1 over 600 cycles at 2 A g−1 in SIBs. Moreover, the capacity retention of such devices is 94%, showing high capacity and good stability.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 86%

S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO₂ for Na⁺/Li⁺ Storage with High Capacity and Long‐Time Stability

Chen

Wang

et al. 2019

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“…In addition, the rationally designed hollow structure enhanced the structure stability of the electrodes. Previous reports indicated that heteroatom-doped carbon materials should promote surface ion storage properties (capacitance effects) for additional capacity [34,51]. In addition, nitrogen adsorption/desorption analysis showed that the surface area and micropore volume of Ni 3 S 2 @NSC were significantly higher than pure Ni 3 S 2 .…”

Section: Resultsmentioning

confidence: 92%

“…After 2 h annealing at 700°C, O=C-O bond vanished and new peak at 283.8 eV appeared in the C 1s spectrum of Ni 3 S 2 @NSC, attributed to C-S-C bond (Fig. 3e) [33,34]. Thus, incorporation of S atoms in the carbon matrix during high-temperature annealing recombined the carbon atoms, resulting in changes in binding energies.…”

Section: Resultsmentioning

confidence: 97%

Ni3S2@S-carbon nanotubes synthesized using NiS2 as sulfur source and precursor for high performance sodium-ion half/full cells

Chen

et al. 2019

Sci. China Mater.

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Nickle sulfides are attractive anode materials for sodium-ion batteries (SIBs) due to their rich structures and natural abundance. However, their applications are greatly hindered by the large volume expansion and poor cycling properties. The introduction of hollow structures and heteroatom-doped carbon layers are effective ways to solve these issues. Here, nitrogen, sulfur co-doped carbon coated Ni 3 S 2 (abbreviated as, Ni 3 S 2 @NSC) nanotubes were prepared by a novel templating route. During the annealing process, NiS 2 acts as both a precursor to Ni 3 S 2 and an S-doped sulfur source. No additional sulfur source was used during the S-doping procedure, suggesting an atomically economic synthesis process. As anodes for sodium-ion half-cells, Ni 3 S 2 @NSCs exhibited high discharge capacity of 481 mA h g −1 at 0.1 A g −1 after 100 cycles with exceptional capacity retention of 98.6%. Furthermore, they maintained excellent rate capability of 318 mA h g −1 even at elevated current density of 5 A g −1 . Sodium-ion full-cells assembled from the Ni 3 S 2 @NSC anodes and Na 3 V 2 (PO 4 ) 3 (NVP@C) cathodes also presented superior capacities and cyclabilities. These features can be attributed to the N, S co-doped carbon coated hollow structure that provided sufficient contact between the electrode and electrolyte, enhanced surface ion storage performance (capacitive effect), and improved structural stability of electrode materials.

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“…Owing to the characteristics of the high energy density and broad voltage range, lithium-ion batteries (LIBs) have gained considerable attention since their development [4][5][6][7]. However, the limited distribution of lithium resources in the earth has hindered their widespread applications in grid energy storage system [8][9][10]. As promising alternatives to LIBs, sodium-ion batteries (NIBs) and potassium-ion batteries (KIBs) have attracted considerable interest owing to the abundance of sodium/potassium sources and their low prices [7,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Improved Na+/K+ Storage Properties of ReSe2–Carbon Nanofibers Based on Graphene Modifications

et al. 2019

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HIGHLIGHTS• Graphene modifications effectively improved conductivity but also resulted in a regulatory effect on the decrease in its diameter.• The synergistic action of graphene and carbon fibers protected the structure of the electrode material and shortened the ion diffusion path.• ReSe 2 @G@CNFs exerted high capacity and long cyclic stability in Na + /K + half cells. When this compound was assembled in Na + full cells, the cells displayed excellent performances ABSTRACT Rhenium diselenide (ReSe 2 ) has caused considerable concerns in the field of energy storage because the compound and its composites still suffer from low specific capacity and inferior cyclic stability. In this study, ReSe 2 nanoparticles encapsulated in carbon nanofibers were synthesized successfully with simple electrospinning and heat treatment.It was found that graphene modifications could affect considerably the microstructure and electrochemical properties of ReSe 2 -carbon nanofibers. Accordingly, the modified compound maintained a capacity of 227 mAh g −1 after 500 cycles at 200 mA g −1 for Na + storage, 230 mAh g −1 after 200 cycles at 200 mA g −1 , 212 mAh g −1 after 150 cycles at 500 mA g −1 for K + storage, which corresponded to the capacity retention ratios of 89%, 97%, and 86%, respectively. Even in Na + full cells, its capacity was maintained to 82% after 200 cycles at 1C (117 mA g −1 ). The superior stability of ReSe 2 -carbon nanofibers benefitted from the extremely weak van der Waals interactions and large interlayer spacing of ReSe 2 , in association with the role of graphene-modified carbon nanofibers, in terms of the shortening of electron/ion transport paths and the improvement of structural support. This study may provide a new route for a broadened range of applications of other rhenium-based compounds.

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S-doped carbon@TiO2 to store Li+/Na+ with high capacity and long life-time

Cited by 57 publications

References 59 publications

S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO₂ for Na⁺/Li⁺ Storage with High Capacity and Long‐Time Stability

S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO₂ for Na⁺/Li⁺ Storage with High Capacity and Long‐Time Stability

Ni3S2@S-carbon nanotubes synthesized using NiS2 as sulfur source and precursor for high performance sodium-ion half/full cells

Improved Na+/K+ Storage Properties of ReSe2–Carbon Nanofibers Based on Graphene Modifications

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S-doped carbon@TiO2 to store Li+/Na+ with high capacity and long life-time

Cited by 57 publications

References 59 publications

S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO2 for Na+/Li+ Storage with High Capacity and Long‐Time Stability

S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO2 for Na+/Li+ Storage with High Capacity and Long‐Time Stability

Ni3S2@S-carbon nanotubes synthesized using NiS2 as sulfur source and precursor for high performance sodium-ion half/full cells

Improved Na+/K+ Storage Properties of ReSe2–Carbon Nanofibers Based on Graphene Modifications

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S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO₂ for Na⁺/Li⁺ Storage with High Capacity and Long‐Time Stability

S‐Doped Carbon Fibers Uniformly Embedded with Ultrasmall TiO₂ for Na⁺/Li⁺ Storage with High Capacity and Long‐Time Stability