Thin-walled graphitic nanocages with nitrogen-doping as superior performance anodes for lithium-ion batteries

Cheng, Hong; Sheng, Zhao Min; Hu, Ming Hui; Dai, Xian You; Chang, Chengkang; Chen, Qi Zhong; Zhang, Dong Yun

doi:10.1039/c6ra10803b

Cited by 19 publications

(12 citation statements)

References 30 publications

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“…As the comparison, interfacial lithium-ion transfer reaction at the interface between GCNS electrode and organic electrolyte solutions were investigated beforehand. In addition, the effect of the structural difference of CNSs prepared at different temperature for interfacial lithium/sodium-ion transfer reaction was also investigated because the defects in the graphitic materials [21,22] and the gaps between graphene layers inside graphitic materials [23,24] influence the diffusion of lithium/sodium-ion. Our group previously reported that the sodium-ion insertion and diffusion inside CNSs seemed to be promoted using CNSs treated at low temperature due to the defects and large interlayer distances [8].…”

Section: Introductionmentioning

confidence: 99%

Kinetic properties of sodium-ion transfer at the interface between graphitic materials and organic electrolyte solutions

et al. 2021

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Graphitic materials cannot be applied for the negative electrode of sodium-ion battery because the reversible capacities of graphite are anomalously small. To promote electrochemical sodium-ion intercalation into graphitic materials, the interfacial sodium-ion transfer reaction at the interface between graphitized carbon nanosphere (GCNS) electrode and organic electrolyte solutions was investigated. The interfacial lithium-ion transfer reaction was also evaluated for the comparison to the sodium-ion transfer. From the cyclic voltammograms, both lithium-ion and sodium-ion can reversibly intercalate into/from GCNS in all of the electrolytes used here. In the Nyquist plots, the semi-circles at the high frequency region derived from the Solid Electrolyte Interphase (SEI) resistance and the semi-circles at the middle frequency region owing to the charge-transfer resistance appeared. The activation energies of both lithium-ion and sodium-ion transfer resistances were measured. The values of activation energies of the interfacial lithium-ion transfer suggested that the interfacial lithium-ion transfer was influenced by the interaction between lithium-ion and solvents, anions or SEI. The activation energies of the interfacial sodium-ion transfer were larger than the expected values of interfacial sodium-ion transfer based on the week Lewis acidity of sodium-ion. In addition, the activation energies of interfacial sodium-ion transfer in dilute FEC-based electrolytes were smaller than those in concentrated electrolytes. The activation energies of the interfacial lithium/sodium-ion transfer of CNS-1100 in FEC-based electrolyte solutions were almost the same as those of CNS-2900, indicating that the mechanism of interfacial charge-transfer reaction seemed to be the same for highly graphitized materials and low-graphitized materials each other. Graphic abstract

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Section: Introductionmentioning

confidence: 99%

Kinetic properties of sodium-ion transfer at the interface between graphitic materials and organic electrolyte solutions

et al. 2021

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“…This low CE might be attributed to the formation of a solid electrolyte interface (SEI) lm on the surface of the carbon materials. 12,15 Nevertheless, the CEs sharply increased to 87% in the sequent cycles (Fig. 3a), and then reached $100%, with number of cycles increasing (Fig.…”

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confidence: 93%

“…Lithium ion batteries (LIBs) are commercially successful energy storage devices, due to their high energy density, high operating voltage and long cycle life. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Its low cost, good electronic conductivity, moderate operation voltage and stability enable graphite to be the dominant anode material for the current LIBs, leading to many novel anodes prepared from advanced graphitic nanomaterials, such as carbon nanotubes (CNTs), 5,6 nanobers (CNFs), 7 nanocages 2, [9][10][11][12][17][18][19][20] and graphenes, [13][14][15][16]21,22 drawing great attention. However, their performance is still far from satisfactory, especially at a high charge-discharge rate ($0.5 A g À1 ), as graphite has a lower theoretical capacity of 372 mA h g À1 .…”

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confidence: 99%

“…However, their performance is still far from satisfactory, especially at a high charge-discharge rate ($0.5 A g À1 ), as graphite has a lower theoretical capacity of 372 mA h g À1 . [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] It should be noted that achieving high capacities at elevated charge/ discharge rates is particularly challenging since the time available for ions to diffuse through the anode and intercalate is now signicantly shorter. 13,22 Chemical doping is an effective strategy to enhance such performance by increasing electronic conductivity or active sites for Li + storage.…”

mentioning

confidence: 99%

“…13,22 Chemical doping is an effective strategy to enhance such performance by increasing electronic conductivity or active sites for Li + storage. 7,10,[12][13][14]20 Additionally, photothermal-reduced graphene was reported to increase Li + diffusion channels by creating micrometerscale open-pore structure in the graphene anodes. 13 Additionally, nanopores was created on the shells of carbon nanomaterials by template approach 3 or KOH activation, 4 which was reported to enhance diffusion of Li + and electrolyte.…”

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confidence: 99%

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Doping-template approach of porous-walled graphitic nanocages for superior performance anodes of lithium ion batteries

et al. 2017

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Hydrogen Production Came from Catalytic Reforming of Volatiles Generated by Waste-Plastic Pyrolysis Over Sepiolite-Based Catalysts

Martín-Lara,

Moreno,

Blázquez

et al. 2024

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Several sepiolite-based catalysts have been prepared and investigated for pyrolytic H2 production from a post-consumer mixture of residual plastics. The experimental installation involved a two-stage reaction system: first, the plastic mixture was thermally pyrolyzed at 500 ºC; then, the generated volatiles were reformed by increasing the temperature to 700 ºC and 800 ºC in the presence of the sepiolite-based catalysts. The real mixture came from non-separate waste collection streams and contained post-consumer polypropylene (rigid and film), expanded polystyrene, high-impact polystyrene, and polyethylene. The results demonstrated that the two-stage pyrolysis technique using sepiolite-based catalysts successfully generated hydrogen. The effects of the type of polymer, temperature, and catalyst were analyzed. The higher production of hydrogen (27.2 mmol H2/g) was obtained when the mixture of plastic waste was pyrolyzed and then the volatiles were reformed at 800 °C with the SN5-800 12 nickel-modified sepiolite. Additionally, the generation of hydrogen also increased after acidifying natural sepiolite (from 18.2 mmol H2/g plastic for natural sepiolite to 26.4 mmol H2/g for acidified sepiolite at 800 ºC with a plastic/catalyst ratio of 1:2). Finally, the carbon deposited in the catalysts was examined. Approximately, only 20% of the carbon that was deposited in the sepiolite-based catalysts was filamentous carbon; the majority was amorphous carbon.The results have therefore shown that it is possible to obtain a hydrogen-rich gas from the reforming of the pyrolysis vapors of a mixture of plastic waste using a low-cost catalyst based on nickel-modified sepiolite.

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Thin-walled graphitic nanocages with nitrogen-doping as superior performance anodes for lithium-ion batteries

Abstract: N-Doped nanocages were prepared with thin-walled graphitic shells (∼1.2 nm), which enhanced electrochemical performance of the nanocages.

Cited by 19 publications

References 30 publications

Kinetic properties of sodium-ion transfer at the interface between graphitic materials and organic electrolyte solutions

Kinetic properties of sodium-ion transfer at the interface between graphitic materials and organic electrolyte solutions

Doping-template approach of porous-walled graphitic nanocages for superior performance anodes of lithium ion batteries

Hydrogen Production Came from Catalytic Reforming of Volatiles Generated by Waste-Plastic Pyrolysis Over Sepiolite-Based Catalysts

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