Synchronous-ultrahigh conductive-reactive N-atoms doping strategy of carbon nanofibers networks for high‐performance flexible energy storage

Liu, Mingzhuang; Li, Xinghua; Shao, Chongyun; Han, Chaohan; Liu, Yu; Ma, Xiaoge; Chen, Feiyu; Liu, Yichun

doi:10.1016/j.ensm.2021.10.025

Cited by 48 publications

(17 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Particularly, nitrogen element with different configurations, such as pyridine nitrogen (N‐6), graphitic carbon (N3), and pyrrolic/pyridonic nitrogen (N‐5), can serve as an desired prototype to achieve above purpose. [ 19 ] Currently, many efforts are devoted to introducing N atoms into the carbon lattice at high temperature, which realizes doping nitrogen from zero to much (zero‐to‐much strategy). In general, the high‐temperature calcination of nitrogen‐containing precursor or in ammonia atmosphere is the most commonly used strategy for obtaining N‐doped carbon.…”

Section: Introductionmentioning

confidence: 99%

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Liang

Liu

Zhang

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Developing high‐performance defect‐rich carbon materials with abundant accessible active sites is exceedingly vital for electrochemical water desalination, but this still remains a significant challenge. Herein, a reverse‐defect‐engineering strategy is reported to synthesize high edge‐nitrogen‐doped nanotube‐like carbon through the annealing process of protonated g‐C3N4 under H2 atmosphere. The hydrogen bonds interaction between the proton and nitrogen atoms performs a crucial role in regulating nitrogen configurations. The nitrogen‐doped carbon obtained from HCl pretreatment (HCl‐NC) reduces the proportion of graphitic N and exhibits a high ratio of pyrrolic N to pyridinic N. Thus, the resulting synergetic structure of high edge‐type N and small graphitic carbon nanodomains ensures more accessible active sites and fast charge‐transfer kinetics simultaneously, contributing to high desalination capacity (100.3 mg g−1 at 1.2 V), fast time‐average specific adsorption rate (1.7 mg g−1 min−1), low energy consumption (82.9 kJ molNaCl−1), and superior cyclic stability (no signs of performance decay after long‐term cycling). The Na+‐intercalation mechanism and structure‐response relationship of HCl‐NC are revealed by the electrochemical quartz crystal microbalance with dissipation monitoring and density functional theory calculations, respectively. This study provides a novel idea to modulate the nanotube‐like, nitrogen‐containing configurations for engineering carbon nanomaterials for advanced electrochemical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Liang

Liu

Zhang

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…3e) exhibited that N-doping configurations in N/P/O-PC-1200 can be resolved into pyridinic N at 398.3 eV, pyrrolic N at 400.1 eV, graphitic N at 401.2 eV, and oxidized N at 402.6 eV [25]. The pyridinic and pyrrolic N are good electron-donor configurations that improve the electrochemical activity and electron transfer efficiency of carbon materials, contributing to the improvement of the charge storage performance [40]. The graphitic N configuration can improve the capacitive performance of carbons due to the enhanced electronic conductivity [41].…”

Section: Resultsmentioning

confidence: 99%

Molecular engineering toward sustainable development of multiple-doped hierarchical porous carbons for superior zinc ion storage

Liu

Feng

et al. 2022

Sci. China Mater.

View full text Add to dashboard Cite

Aqueous Zn-ion hybrid supercapacitors (ZHSCs) hold great potential as next-generation energy storage devices due to their low cost, excellent rate capability, long cycling life, and high safety. Heteroatom-doped hierarchical porous carbons (HD-HPCs) with integrated high specific surface area, multiscale pores, and abundant defects have been regarded as promising cathode materials for ZHSCs. However, the in situ architecture of HD-HPCs with these multiple advantages via a sustainable and controllable method remains an arduous challenge. Herein, a novel molecular engineering strategy was proposed for the in situ construction of N/P/O-doped HD-HPCs via the direct carbonization of multiple-heteroatom-rich hypermolecules. Such a strategy has multiple advantages, including the exclusion of pore-making techniques, activation agents, templates, and complicated and hazard washing processes, demonstrating its green and sustainable properties. The highly active multiple-heteroatom-rich hypermolecular precursors contributed to the formation of abundant micro/mesopores due to the self-abscission of heteroatoms and heteroatom-contiguous carbon atoms at high carbonization temperatures. Consequently, these active structural/compositional features endowed the optimal cathodes with outstanding storage capacities of 139.2 and 88.9 mA h g −1 at 0.5 and 20 A g −1 for aqueous ZHSCs, respectively. They also delivered a superior storage performance in quasi-solid ZHSCs (QS-ZHSCs) with a high specific capacity of 111.5 mA h g −1 at 0.5 A g −1 . Superior energy/power densities and long cycling stability were also achieved for aqueous and QS-ZHSCs. The theoretical calculation confirmed the synergetic effects of multiple-atom doping on enhancing the electronic conductivity and reducing the energy barrier between Zn ions and carbon, which promote the Zn-ion adsorption capability. These findings shed fresh light on the straightforward manufacture of superior HD-HPCs for electrochemical energy storage.

show abstract

“…According to a previous report, edge nitrogen is beneficial to the electrochemical activity of the material, while graphitic nitrogen has a weakening effect on conductivity [ 38 ]. In high-resolution XPS, O 1 s spectra are fitted as C–O (530.20 eV), C = O (532.31 eV), and O-S (528.28 eV), and S 2p spectra are fitted as S 2p 2/3 (163.80 eV), S 2p1/3(164.98 eV), and sulfate (167.28 eV) [ 39 ]. High heteroatom doping rate leads to a high defect degree in carbon materials causing expansion of graphite interlayer distance (also verified by XRD and Raman Spectra) as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Design of Flexible Films Based on Kinked Carbon Nanofibers for High Rate and Stable Potassium-Ion Storage

Xiong

Zhang

2022

Nano-Micro Lett.

View full text Add to dashboard Cite

With the emergence of wearable electronics, flexible energy storage materials have been extensively studied in recent years. However, most studies focus on improving the electrochemical properties, ignoring the flexible mechanism and structure design for flexible electrode materials with high rate capacities and long-time stability. In this study, porous, kinked, and entangled network structures are designed for highly flexible fiber films. Based on theoretical analysis and finite element simulation, the bending degree of the porous structure (30% porosity) increased by 192% at the micro-level. An appropriate increase in kinking degree at the meso-level and contact points in entanglement network at the macro-level are beneficial for the flexibility of fiber films. Therefore, a porous and entangled network of sulfur-/nitrogen-co-doped kinked carbon nanofibers (S/N-KCNFs) is synthesized. The nanofiber films synthesized from melamine as nitrogen sources and segmented vulcanization exhibited a porous, kinked, and entangled network structure, and the stretching degree increased several times. The flexible S/N-KCNFs anode delivered a higher rate performance of 270 mAh g−1 at a current density of 2000 mA g−1 and a higher capacity retention rate of 93.3% after 2000 cycles. Moreover, the foldable pouch cell assembled by potassium-ion hybrid supercapacitor operated safely at large-angle bending and showed long-time stability of 88% capacity retention after 4000 cycles. This study provides a new idea and strategy for the flexible structure design of high-performance potassium-ion storage materials.

show abstract

Synchronous-ultrahigh conductive-reactive N-atoms doping strategy of carbon nanofibers networks for high‐performance flexible energy storage

Cited by 48 publications

References 56 publications

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Molecular engineering toward sustainable development of multiple-doped hierarchical porous carbons for superior zinc ion storage

Design of Flexible Films Based on Kinked Carbon Nanofibers for High Rate and Stable Potassium-Ion Storage

Contact Info

Product

Resources

About