Regulating microstructure of walnut shell-derived hard carbon for high rate and long cycling sodium-based dual-ion batteries

Cheng, Zheng; Jian, Bangquan; Xu, Xiangcheng; Zhong, Jiarui; Yang, Hua; Huang, Shaoming

doi:10.1016/j.cej.2022.140434

Cited by 26 publications

(7 citation statements)

References 48 publications

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“…As depicted in Figure 3c, NSPC6-700 exhibited two additional peaks at 165.08 and 400.08 eV, corresponding to S 2p and N 1s, respectively, indicating the successful incorporation of S and N atoms into the carbon matrix as confirmed by EDS analysis, while PC solely composed of C and O elements. 22,23 The C 1s spectrum of NSPC6-700 displayed four prominent peaks at 284.80, 285.60, 286.60, and 289.08 eV, assigned to C−C/C�C, C−N, C−O/C−S, and C�O, respectively. 24 In the N 1s spectrum (Figure 3e), three peaks were observed at 398.56, 400.13, and 400.94 eV, corresponding to N-6 (pyridinic-N), N-5 (pyrrolic-N), and N-Q (graphitic-N), respectively.…”

Section: Resultsmentioning

confidence: 99%

Slope-Dominated N/S Co-Doped Carbon Anode Derived from Pitch for Sodium-ion Batteries

Zhao,

Huang,

Chen

et al. 2023

ACS Appl. Eng. Mater.

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Carbon-based anode materials have received extensive attention due to their exceptional cycling performance and low cost in sodium-ion batteries, but the poor capacity and slow diffusion kinetics of sodium ions remain a challenge for commercial applications. Herein, we report a N, S codoping strategy based on the capacitance-dominated mechanism via one-step pyrolysis method. The increase in disorder and defect concentrations in carbon materials results in a greater abundance of active sites, facilitating the “adsorption” storage of sodium ions on the surface of the carbon matrix. Consequently, this strategy effectively enhances both the sodium storage capacity and the ion diffusion rate of the carbon electrode material. The optimized N,S-codoped pitch carbon (NSPC) demonstrates a high reversible capacity of 254.3 mAh g–1 at 0.03 A g–1 and retains a capacity of 131.1 mAh g–1 at 5 A g–1. Our study offers valuable insights for the development of cost-effective and safe anode materials for sodium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Slope-Dominated N/S Co-Doped Carbon Anode Derived from Pitch for Sodium-ion Batteries

Zhao,

Huang,

Chen

et al. 2023

ACS Appl. Eng. Mater.

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“…The hollow porous carbon structures prepared from walnut shells have also been proved to have a high specific surface area, which ensures exposure of more reactive active sites. 29,30 In this study, we facilely prepared a walnut shell-derived Fe, N codoped porous carbon framework (Fe-N-C) by a one-pot pyrolysis process using ZnCl 2 as the chemical activation and poremaking agent. Although there have been multiple reports on the inclusion of N and Fe in various carbon structures to prepare efficient nanocatalysts, the present study will be the first research paper to use the dual modification of Fe and N atoms in walnut shell-derived porous carbon frameworks for nanozyme catalytic applications.…”

Section: Introductionmentioning

confidence: 99%

Design of Fe and N co-decorated biomass-derived hierarchical porous carbon frameworks with boosted oxidase-like activity for hydroquinone detection

Zhang,

Qi,

Wang

et al. 2024

New J. Chem.

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“…Due to its flexible molecular design, it is possible to achieve the controllable preparation of the polymer-based precursor with heteroatoms such as N and S, which can then be stably introduced into the skeleton of the HC, achieving a high batch consistency of the prepared material. Meanwhile, the cross-linking density of benzoxazine resin after the curing reaction is high, which is beneficial to the formation of hard-carbon materials with low specific surface area, high structural stability, and abundant nanopores. − …”

Section: Introductionmentioning

confidence: 99%

Flexible Precursor Modulation toward Selective Heteroatom Doping in a Hard-Carbon Anode for Sodium-Ion Batteries

Zhang,

Yang,

Xiao

et al. 2023

Energy Fuels

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Hard carbon (HC) doped with heteroatoms is considered an ideal anode for sodium-ion batteries (SIBs) due to its abundance and stable physicochemical properties. However, it is still necessary to break through the constraints of batch consistency, low Coulombic efficiency, and limited cyclability in practical applications. Herein, a flexible molecular design of precursors toward selective heteroatoms doping strategy is proposed, and uniform nitrogen/sulfur mono- or codoped hard carbon with batch consistency is prepared in situ from benzoxazine resin in one step as an HC anode of SIBs. The HC prepared by this efficient batch-consistent and controllable synthesis strategy forms a multiactive site-wide interlayer spacing-stabilized skeleton coupling structure, which facilitates electron/ion transport, improves electrolyte wettability, and comprehensively improves sodium storage performance. The nitrogen–sulfur codoped hard carbon (N/S-HC) shows excellent rate performance (280 mAh g–1 at 30 mA g–1 and 166 mAh g–1 at 600 mA g–1) and long cycle life with capacity retention of 88% at 600 mA g–1 after 2000 cycles. Kinetic investigation indicates that N/S codoping enhanced the adsorption and diffusion of Na+, and ex situ Raman test revealed the Na+ storage mechanism of N/S-HC. This work provides an important view of optimizing Na+ storage performances of HC anodes by molecular design engineering, which can be broadened into other electrode materials.

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Regulating microstructure of walnut shell-derived hard carbon for high rate and long cycling sodium-based dual-ion batteries

Cited by 26 publications

References 48 publications

Slope-Dominated N/S Co-Doped Carbon Anode Derived from Pitch for Sodium-ion Batteries

Slope-Dominated N/S Co-Doped Carbon Anode Derived from Pitch for Sodium-ion Batteries

Design of Fe and N co-decorated biomass-derived hierarchical porous carbon frameworks with boosted oxidase-like activity for hydroquinone detection

Flexible Precursor Modulation toward Selective Heteroatom Doping in a Hard-Carbon Anode for Sodium-Ion Batteries

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