Facile self-templating synthesis of layered carbon with N, S dual doping for highly efficient sodium storage

Li, Jiabao; Ding, Zibiao; Pan, Likun; Li, Jinliang; Wang, Chengyin; Wang, Guoxiu

doi:10.1016/j.carbon.2020.10.092

Cited by 130 publications

(65 citation statements)

References 65 publications

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“…Raman characterizations were further carried out to prove the NC coating. The D band (1374 cm −1 ) and G band (1574 cm −1 ) can be easily detected in the spectra of Ti 3 C 2 T x @NC and MoS 2 /Ti 3 C 2 T x @NC (Figure 2b), which can be ascribed to disordered carbon and graphitic carbon, respectively, thereby demonstrating the generation of NC [25] . As known, both 1T and 2H structures exist in the heterostructure of MoS 2 .…”

Section: Resultsmentioning

confidence: 72%

“…To reveal the detailed working mechanism of MoS 2 /Ti 3 C 2 T x @NC upon cycling, ex‐situ XPS measurements at selected voltages were collected during the first cycle (Figure 7d). For the Na 1s spectra, no peak can be found for the pristine electrode, and sharp Na 1s peak appears and shifts to the left during discharging, showing the insertion of Na + into the target electrode as well as the generation of SEI layers [25,45] . After charging, the Na 1s peak returns to its pristine position, manifesting good electrochemical reversibility.…”

Section: Resultsmentioning

confidence: 98%

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Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS₂ Nanosheets/Ti₃C₂T_x MXene Hybrids for Highly Reversible Sodium Storage

Tang

et al. 2021

ChemSusChem

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Although it is a promising sodium storage material due to its excellent electrochemical activity, small bandgap, and large interlayer spacing, layered molybdenum disulfide (MoS2) suffers from poor rate capability and degraded cycling life, resulting from its serious aggregation upon preparation, sluggish reaction kinetics, and structure expansion during cycling. To address these issues, a polyethyleneimine (PEI)‐assisted fabrication approach was developed for the rational synthesis of an interconnected framework with nitrogen‐doped carbon‐confined MoS2 nanosheets/Ti3C2Tx MXene (MoS2/Ti3C2Tx@NC), where the PEI could guide the uniform growth of MoS2 on Ti3C2Tx and the self‐generated NC simultaneously enhanced its synergistic coupling with MoS2/Ti3C2Tx, thus contributing to the improvement of charge transfer, diffusion kinetics, and structural integrity of the hybrid electrode. Consequently, the desired MoS2/Ti3C2Tx@NC delivered impressive sodium storage performance, demonstrating high reversible capacities of 397.3 and 206.8 mAh g−1 at 0.1 A g−1 after 100 cycles and 0.5 A g−1 after 500 cycles, respectively. Moreover, electrochemical kinetics analysis and charge storage mechanism manifested that high capacitive contribution, facilitated Na+ transport pathways, and synergistic electronic coupling between MoS2/Ti3C2Tx and NC contributed to the superior sodium storage performance.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 98%

Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS₂ Nanosheets/Ti₃C₂T_x MXene Hybrids for Highly Reversible Sodium Storage

Tang

et al. 2021

ChemSusChem

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“…where k 1 and k 2 are constants, and the current ( I ) response consists of capacitive effect ( k 1 v ) and diffusion‐controlled process ( k 2 v 0.5 ) [53,54] . As shown in Figure 5c, the the contribution ratio of capacitive kinetics process is calculated to be 58.0 % at a scan rate of 0.4 mV s −1 .…”

Section: Resultsmentioning

confidence: 95%

Structure‐Designed Preparation of Pod‐Like CuCo₂S₄/rGO as Advanced Anode Material Targeting Superior Sodium Storage

Jiao

Zhou

et al. 2021

ChemElectroChem

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It is urgent to design and assemble anode materials with long cycling life and high capacity for sodium‐ion batteries (SIBs). Thereby, pod‐like CuCo2S4/rGO, with a unique core‐shell structure, was successfully fabricated through a solvothermal method, a green reduction process, and a following liquid‐nitrogen treatment. CuCo2S4 spheres were embedded into rGO nanosheet scrolls, forming a unique pod‐like structure due to the shrinkage of rGO during the liquid‐nitrogen treatment. The pod‐like CuCo2S4/rGO material exhibits a superior electrochemical performance compared to bare CuCo2S4, including a high capacity (557.5 mAh g−1 at 0.1 A g−1) and good rate capability (372 mAh g−1 at 2 A g−1). In addition, a long cycling life with a high capacity of 341 mAh g−1 over 5000 cycles at 2 A g−1 is achieved. The improved electrochemical performance can be ascribed to the unique pod‐like core‐shell structure, which cannot only provide efficient pathways to facilitate electron/ion transportation, but also relieve the strain caused by volume change to maintain the structural stability. This work offers a simple strategy to prepare rGO‐wrapped CuCo2S4 nanocomposites with stable pod‐like structure, proving their potential application as anode materials for SIBs.

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“…In addition, we also investigate their electrochemical behavior according to the change in their CV curves. The relationship of current (i) and scan rate (v) can be calculated by Equation (1) [ 53 , 54 ]:

which can be transformed into Equation (2):

…”

Section: Resultsmentioning

confidence: 99%

Ultra-Stable Potassium Ion Storage of Nitrogen-Doped Carbon Nanofiber Derived from Bacterial Cellulose

et al. 2021

Nanomaterials

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As a promising energy storage system, potassium (K) ion batteries (KIBs) have received extensive attention due to the abundance of potassium resource in the Earth’s crust and the similar properties of K to Li. However, the electrode always presents poor stability for K-ion storage due to the large radius of K-ions. In our work, we develop a nitrogen-doped carbon nanofiber (N-CNF) derived from bacterial cellulose by a simple pyrolysis process, which allows ultra-stable K-ion storage. Even at a large current density of 1 A g−1, our electrode exhibits a reversible specific capacity of 81 mAh g−1 after 3000 cycles for KIBs, with a capacity retention ratio of 71%. To investigate the electrochemical enhancement performance of our N-CNF, we provide the calculation results according to density functional theory, demonstrating that nitrogen doping in carbon is in favor of the K-ion adsorption during the potassiation process. This behavior will contribute to the enhancement of electrochemical performance for KIBs. In addition, our electrode exhibits a low voltage plateau during the potassiation–depotassiation process. To further evaluate this performance, we calculate the “relative energy density” for comparison. The results illustrate that our electrode presents a high “relative energy density”, indicating that our N-CNF is a promising anode material for KIBs.

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Facile self-templating synthesis of layered carbon with N, S dual doping for highly efficient sodium storage

Cited by 130 publications

References 65 publications

Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS₂ Nanosheets/Ti₃C₂T_x MXene Hybrids for Highly Reversible Sodium Storage

Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS₂ Nanosheets/Ti₃C₂T_x MXene Hybrids for Highly Reversible Sodium Storage

Structure‐Designed Preparation of Pod‐Like CuCo₂S₄/rGO as Advanced Anode Material Targeting Superior Sodium Storage

Ultra-Stable Potassium Ion Storage of Nitrogen-Doped Carbon Nanofiber Derived from Bacterial Cellulose

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Facile self-templating synthesis of layered carbon with N, S dual doping for highly efficient sodium storage

Cited by 130 publications

References 65 publications

Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS2 Nanosheets/Ti3C2Tx MXene Hybrids for Highly Reversible Sodium Storage

Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS2 Nanosheets/Ti3C2Tx MXene Hybrids for Highly Reversible Sodium Storage

Structure‐Designed Preparation of Pod‐Like CuCo2S4/rGO as Advanced Anode Material Targeting Superior Sodium Storage

Ultra-Stable Potassium Ion Storage of Nitrogen-Doped Carbon Nanofiber Derived from Bacterial Cellulose

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Product

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Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS₂ Nanosheets/Ti₃C₂T_x MXene Hybrids for Highly Reversible Sodium Storage

Crosslinking Nanoarchitectonics of Nitrogen‐doped Carbon/MoS₂ Nanosheets/Ti₃C₂T_x MXene Hybrids for Highly Reversible Sodium Storage

Structure‐Designed Preparation of Pod‐Like CuCo₂S₄/rGO as Advanced Anode Material Targeting Superior Sodium Storage