Facile fabrication of a vanadium nitride/carbon fiber composite for half/full sodium-ion and potassium-ion batteries with long-term cycling performance

Xu, Lihong; Xiong, Peixun; Ling, Zeng; Liu, Renpin; Liu, Junbin; Luo, Fenqiang; Li, Xinye; Chen, Qinghua; Wei, Mingdeng; Qian, Qingrong

doi:10.1039/c9nr10211f

Cited by 40 publications

(28 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…≈40.35% of the weight is left due to the combustion of CFs and the oxidation of VN to V 2 O 5 in the air. [21] Accordingly, the content of VN in VN@ CFs-550 is calculated to be 42.9 wt.%, which is comparable to other reported VN-based situations (Table S1, Supporting Information). N 2 sorption measurements give type IV isotherms, indicating the hierarchically porous structure of VN@CFs (Figures S12 and S13, Supporting Information).…”

Section: Resultssupporting

confidence: 81%

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

Zhou

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Developing a high‐rate and stable battery‐type anode to match the capacitor‐type cathode is a critical issue for potassium ion capacitors (PICs). Surface‐redox pseudocapacitive materials can meet this demand due to their fast surface Faradaic reaction kinetics and superior structure stability during charging–discharging. Herein, a free‐standing anode by growing VN particle‐composed nanosheets on carbon fibers (VN@CFs) is developed. The VN@CFs is endowed with high reversible capacity of 245.8 mA h g–1 at 0.05 A g–1, high rate performance of 102.7 mA h g–1 at 6.0 A g–1, and long‐term stability. Based on the in situ XRD, ex situ XPS and TEM characterizations, and density functional theory calculations, it is proved that the potassium storage of VN derives from a surface‐redox pseudocapacitive mechanism between VN and K+, rather than an intercalation or conversion reaction. As expected, the as‐assembled PICs based on the VN@CFs anode show an ultrahigh power output of 10.9 kW kg–1 when keeping an energy density of 49.2 Wh kg–1 and excellent capacity retention of 86.8% after 15000 cycles.

show abstract

Section: Resultssupporting

confidence: 81%

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

Zhou

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…[38][39][40][41] However, it still suffers from low electronic conductivity and volume change, 42,43 which are inherent defects of metal oxides. 44,45 The huge volume expansion during the charge and discharge process leads to structural collapses, which result in a worse rate performance and limited cycle life. Besides, the electrochemical reaction occurs only on the surface of electrode materials, and it is difficult to gain real potassium storage performance.…”

Section: Introductionmentioning

confidence: 99%

Stabilizing V₂O₃ in carbon nanofiber flexible films for ultrastable potassium storage

Zheng

Lin

et al. 2022

Inorg. Chem. Front.

View full text Add to dashboard Cite

show abstract

“…The correlation of scan rate ( v ) and measured current ( i ) is explained by eq where the b value is equal to the slope of the log( v )–log( i ) plots, as displayed in Figure b. The b values were calculated to be 0.668 and 0.67 for the anodic and cathodic peaks, respectively, revealing that the electrochemical reaction mechanism consists of both surface capacitive contribution and a diffusion-controlled insertion process …”

Section: Resultsmentioning

confidence: 97%

“…The b values were calculated to be 0.668 and 0.67 for the anodic and cathodic peaks, respectively, revealing that the electrochemical reaction mechanism consists of both surface capacitive contribution and a diffusion-controlled insertion process. 50 The galvanostatic intermittent titration technique (GITT) was further explored to examine the kinetics of Li storage in the Co 5 Ge 3 /N-CNT composite and Ge/C anodes, and the results were performed as a pulse current of 0.1 A g −1 for 0.25 h followed by a standing time of 4 h for every pulse in Figure 5c and e, respectively. Overpotential was observed for two anodes because of the large strain and stress during the period of Li + intercalation/deintercalation.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

In Situ Confined Co₅Ge₃ Alloy Nanoparticles in Nitrogen-Doped Carbon Nanotubes for Boosting Lithium Storage

Tang

Huang

et al. 2020

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Ge-based materials have garnered much attention in lithium-ion batteries (LIBs) for their high theoretical capacity, but these materials suffer from huge volume changes and serious pulverization, which cause insufficient lithium storage performance. Herein, a composite composed of Co 5 Ge 3 -and nitrogen-doped carbon nanotube (Co 5 Ge 3 /N-CNT) was successfully synthesized using ZIF-67 and GeO 2 as precursors. There are interactions between the Co 5 Ge 3 alloy nanoparticles and carbon nanotubes in the growth process, in which the Co 5 Ge 3 alloy nanoparticles were confined in situ in N-CNTs and the in situ growth of N-CNTs was boosted in the existence of the Co 5 Ge 3 catalyst. Density functional theory calculations revealed that the electronic conductivity of the Co 5 Ge 3 alloy is much higher than that of Ge and the Li + interaction energy of the former is lower than that of the latter. In addition, the interconnected carbon nanotubes not only offer Li + diffusion pathways and electronic networks but also increase electronic conductivity. Importantly, carbon nanotubes and Co metal have a synergistic effect of buffering volume charge of Ge in the process of Li + intercalation/deintercalation. As expected, the Co 5 Ge 3 /N-CNT composite demonstrated a high reversible capacity of 853.7 mA h g −1 at 2 A g −1 after 1500 cycles and attractive rate performance of up to 10 A g −1 .

show abstract

Facile fabrication of a vanadium nitride/carbon fiber composite for half/full sodium-ion and potassium-ion batteries with long-term cycling performance

Abstract: A VN/CNF composite was fabricated as an anode material exhibiting superior performance for half/full sodium-ion and potassium-ion batteries.

Cited by 40 publications

References 87 publications

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

Stabilizing V₂O₃ in carbon nanofiber flexible films for ultrastable potassium storage

In Situ Confined Co₅Ge₃ Alloy Nanoparticles in Nitrogen-Doped Carbon Nanotubes for Boosting Lithium Storage

Contact Info

Product

Resources

About

Facile fabrication of a vanadium nitride/carbon fiber composite for half/full sodium-ion and potassium-ion batteries with long-term cycling performance

Abstract: A VN/CNF composite was fabricated as an anode material exhibiting superior performance for half/full sodium-ion and potassium-ion batteries.

Cited by 40 publications

References 87 publications

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

Stabilizing V2O3 in carbon nanofiber flexible films for ultrastable potassium storage

In Situ Confined Co5Ge3 Alloy Nanoparticles in Nitrogen-Doped Carbon Nanotubes for Boosting Lithium Storage

Contact Info

Product

Resources

About

Stabilizing V₂O₃ in carbon nanofiber flexible films for ultrastable potassium storage

In Situ Confined Co₅Ge₃ Alloy Nanoparticles in Nitrogen-Doped Carbon Nanotubes for Boosting Lithium Storage