Hydrogen-enriched porous carbon nanosheets with high sodium storage capacity

Yoon, Dohyeon; Kim, Dong Hyun; Chung, Kyung Yoon; Chang, Wonyong; Kim, Seung Min; Kim, Jae-Hoon

doi:10.1016/j.carbon.2015.11.009

Cited by 82 publications

(47 citation statements)

References 56 publications

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“…The peaks located at 1353 and 1567 cm −1 are attributed to D‐band and G‐band, respectively . The calculated I D / I G values are 0.89, 0.92, 0.97, and 1.01 for CNFAs, S‐CNFAs, N‐CNFAs, and S/N‐CNFAs, respectively . This result indicates that the S or N doping could generate extrinsic defective structure in the nanofibers.…”

Section: Resultsmentioning

confidence: 91%

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

Liu

et al. 2019

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Carbonaceous materials are promising anodes for potassium‐ion batteries (PIBs). However, it is hard for large K ions (1.38 Å) to achieve long‐distance diffusion in pristine carbonaceous materials. In this work, the following are synthesized: S/N codoped carbon nanofiber aerogels (S/N‐CNFAs) with optimized electronic structure by S/N codoping, enhanced interlayer spacing by S doping, and a 3D interconnected porous structure of aerogel, through a pyrolysis sustainable seaweed (Fe‐alginate) aerogel strategy. Specifically, the S/N‐CNFAs electrode delivers high reversible capacities of 356 and 112 mA h g−1 at 100 and 5000 mA g−1, respectively. The capacity reaches 168 mA h g−1 at 2000 mA g−1 after 1000 cycles. A full cell with a S/N‐CNFAs anode and potassium prussian blue cathode displays a specific capacity of 198 mA h g−1 at 200 mA g−1. Density functional theory calculations indicate that S/N codoping is beneficial to synergistically improve K ions storage of S/N‐CNFAs by enhancing the adsorption of K ions and reducing the diffusion barrier of K ions. This work offers a facile heteroatom doping paradigm for designing new carbonaceous anodes for high‐performance PIBs.

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Section: Resultsmentioning

confidence: 91%

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

Liu

et al. 2019

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132

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“…These signals are attributed to O = C-OH in carboxylic groups, and the shake-up satellite peaks due to π-π * transitions in aromatic rings, respectively. [44][45][46][47][48] The thermally expanded graphite (TEG) shows a similar profile than GSM sample, both have about 1% at. conc.…”

Section: Resultsmentioning

confidence: 95%

“…18,19 Also, it is suggested that the anion plays a role in the transport of cations, either through correlated motion of cations and anions or via transport of cation-anion clusters. 10,20,21 Regarding the carbon material, the influence of several factors such as heteroelement contents, 8,22 structural differences in soft and hard carbons, 8,[23][24][25] morphological properties (nanowires, nanotubes, microbeads reduced graphene oxides or hollow carbon nanoparticles), [26][27][28][29][30][31][32] have been investigated as anodes for SIBs using standard electrolytes. Nonetheless, it is needed a further progress in the preparation of C-based materials.…”

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confidence: 99%

On the Reliability of Sodium Co-Intercalation in Expanded Graphite Prepared by Different Methods as Anodes for Sodium-Ion Batteries

Cabello

Bai

Chyrka

et al. 2017

J. Electrochem. Soc.

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Recent improvements of sodium ion batteries have been achieved by the use of graphitic carbon as an anode and glyme-based electrolytes. In this work, expanded graphites are prepared by thermal expansion, Broddie and Hummer's modified methods. Their structural, morphological and electrochemical properties are compared with those of the original natural graphite. XRD patterns, XPS and Raman spectra corroborate the presence of graphite oxide intermediates and reveal different reduced forms of expanded graphite which can affect the sodium insertion properties. The use of sodium triflate in diglyme enhanced the electrochemical performance in terms of delivering a flat plateau at ca. 0.65 and 0.55 V in discharge/charge cycles. The thermally expanded graphite increased the capacity and efficiency from 100 to 115 mA h g −1 and from 93 to 96% over 100 cycles when cycled at C rate as compared to natural graphite. Ex-situ XRD patterns reveal the presence of new set of reflections ascribable to sodium ordering in different stages as evidenced by the calculated Patterson diagrams. The new results described here would account for development of carbon-based material and their prospects and challenges for sodium ion battery anodes. The sodium intercalation into graphite is still one of the most interesting and unusual in the solid state chemistry of intercalation compounds. Neither ionic nor hard sphere model theory explains why the liquid phase interaction of molten sodium with graphite provides only high-stage compositions.1,2 This effect contrasts with that for other alkali metals, 3 in which first-stage graphite intercalation compounds (GICs) can be easily obtained. Udod suggested that the discrepancy between the size of sodium atoms and the distances between potential minima in the graphite sheet causes the absence of low-stage Na-GICs. 4 Graphite has a long-range-ordered layered structure where Li + ion can be easily intercalated between the graphene layers by electrochemical means. The main lithium insertion reaction occurs at a flat plateau around 0.2 V, and the capacity is 372 mA h g −1 . 5,6 Unlike, the graphite anode does not intercalate sodium to any appreciable extent. The galvanostatic curves during the full sodiation/desodiation shows a monotonic voltage curves, which capacity is lower than 35 mA h g −1 . 7,8 This normally refers to the standard electrolytes that are based on organic carbonates (EC ethylene carbonate, DMC dimethylcarbonate) and lithium salts (LiPF 6 ) or sodium salts (NaPF 6 ).In the search for alternative secondary batteries that will replace lithium ion batteries (LIBs), sodium ion batteries (SIBs) have received attention due to the following reasons: (i) abundance of sodium sources (it is the 4 th most abundant element in the earth crust), (ii) the low cost of sodium compared to lithium, especially for largescale electric storage applications, and (iii) the similar chemistry of sodium and lithium.9 So far, several issues have scoffed at the optimal performance of graphite anodes at both lithi...

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“…More specially, the D band corresponds to the vibration caused by disordered carbon at the graphite sheet edges and the G band can be attributed to the 2D stretching vibration of graphitic CC bond . Due to the high value of D band, it indicates the existence of a large number of defects and finally enhances the battery performance …”

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confidence: 99%

Insert Zn Nanoparticles into the 3D Porous Carbon Ultrathin Films as a Superior Anode Material for Lithium Ion Battery

Xing

Zhao

et al. 2018

Part & Part Syst Charact

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A flexible strategy is exploited to insert Zn nanoparticles into the pores of highly stable 3D network of carbon ultrathin films (P‐Zn/C) that can effectively localize the postformed Zn nanoparticles, thereby solving the problem of structural degradation, and thus achieve improved anode performance. A maximum capacity of 657.3 mA h g−1 at a current density of 200 mA g−1 after 50 cycles is achieved for P‐Zn/C. Even at a high current density of 2 A g−1, a capacity of 653 mA h g−1 is maintained after 1000 cycles, indicating that it could be a promising anode for lithium ion batteries. By comparing the capacitive and diffusion contribution qualitatively and quantitatively, the result reveals that the enhanced electrochemical performance mainly originates from the pseudocapacitance storage mechanism.

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Hydrogen-enriched porous carbon nanosheets with high sodium storage capacity

Cited by 82 publications

References 56 publications

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

3D Sulfur and Nitrogen Codoped Carbon Nanofiber Aerogels with Optimized Electronic Structure and Enlarged Interlayer Spacing Boost Potassium‐Ion Storage

On the Reliability of Sodium Co-Intercalation in Expanded Graphite Prepared by Different Methods as Anodes for Sodium-Ion Batteries

Insert Zn Nanoparticles into the 3D Porous Carbon Ultrathin Films as a Superior Anode Material for Lithium Ion Battery

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