MWCNT synergy for boosting the electrochemical kinetics of V<sub>2</sub>O<sub>5</sub> cathode for lithium-ion batteries

Mustafa, Hamna; Yu, Yanlong; Zafar, Amina; Liu, Yanguo; Karim, Shafqat; Javed, Saqib; Mehboob, Sheeraz; Sun, Hongyu; Hussain, Shafqat; Shah, Ajmal; Hussain, Syed Zahid; Safdar, Amna; Nisar, Amjad; Ahmad, Mashkoor

doi:10.1039/d1nj06245j

Cited by 6 publications

(3 citation statements)

References 48 publications

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“…In contrast, the HOMO (H 1 ) shifts towards more negative side of the energy scale [7,31] . Here, QD has band gap of ~1.6 nm, the E 1 must be >−4.0 eV and H 1 <−5.40 eV, facilitating the possibility of charge transfer to the conduction band of wide band gap semiconductor TiO 2 (−4.0 eV) [32] as well as directly to the conduction band of MWCNT (−4.3 eV) [33] . The photoinduced electron transfer from PbS QD to TiO 2 , MWCNT and the hybrid TiO 2 ‐MWCNT under excitation of 510 nm has been observed from steady‐state emission data shown in Figure 4a.…”

Section: Resultsmentioning

confidence: 99%

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

Pan,

Hasan,

Ghosh

et al. 2024

ChemistrySelect

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Efficient energy harvesting through full solar spectrum utilization has been considered a promising solution to world energy and environmental issues. In this direction, lead sulphide (PbS) quantum dot (QD) based hybrid materials find greater application due to their near‐infrared (NIR) active photo response. Slower charge injection and inefficient charge separation limit photoactive response of such NIR active low band gap semiconductor like PbS QDs. Moreover, constructing dual charge transfer pathways in a PbS QDs based nanocomposite through the formation of hybrids with suitable materials can be advantageous in suppressing the charge recombination. In this work, we have synthesized a nanocomposite after decorating the PbS‐QDs with semiconducting TiO2 nanoparticles modified with multiwall carbon nanotubes (MWCNT) and thus forming the tri‐hybrid (PbS‐TiO2‐MWCNT) nanocomposites. The enhanced photo‐activities of the tri‐hybrid, as compared to di‐hybrids like PbS‐TiO2, PbS‐MWCNT were confirmed by the steady state, time‐resolved photoluminescence (TRPL) measurements and reactive oxygen species (ROS) generation measurements. Higher ROS generation in the tri‐hybrid has been correlated with a faster interfacial electron transfer due to the dual charge injection pathway of PbS QD to TiO2 and MWCNT. The enhanced activity of the trio‐hybrid has also been analyzed from the first principal calculations in light of an efficient interfacial electron transfer as a result of the dual charge injection pathway. The photoelectrochemical water‐spilling response of the photoanodes in terms of photocurrent density, electrochemical impedance, and Mott–Schottky measurements on PbS‐TiO2 and PbS‐TiO2‐MWCNT photoanodes reveal that a combination of MWCNT and TiO2 exhibits an increase in electrical double layer capacitance, decrease in series resistance and enhancement of carrier density with NIR illumination at the heterojunction. Overall, all the dynamical studies at the interface of the trihybrid‐based photoanodes demonstrate its potential of utilization as a futuristic NIR‐ active photoelectrochemical water‐splitting material.

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Section: Resultsmentioning

confidence: 99%

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

Pan,

Hasan,

Ghosh

et al. 2024

ChemistrySelect

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“…The conduction band of PCBM (E CB = −3.9 eV) and MWCNT (E CB = −4.22 eV) offers a favorable energetic pathway to the photoelectrons, accumulated at the conduction band of Fe 2 O 3 (E CB = −3.4 eV) upon photoexcitation. [42][43][44] Further, the MWCNTs, due to their metallic nature, do not offer any energy barrier for the transport of photoelectrons to the CF current collector. Therefore, the energy bands alignment of the photocathode components helps in the smooth extraction of photoelectrons so they can reach the counter electrode (Li-metal) through an external circuit.…”

Section: Resultsmentioning

confidence: 99%

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe₂O₃ Photocathodes

Chamola

Ahmad

2023

Advanced Sustainable Systems

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In recent years, photorechargeable Li‐ion batteries (Li‐PRBs) are investigated as potential energy devices to supply continuous power to remote IoT or electronic devices. These Li‐PRBs, due to their lightweight and low‐cost, offers various advantages compared to conventional combination of solar cells and a battery. Single active material‐based PRBs have gained attention due to the use of multifunctional materials which perform both solar energy harvesting and storage, however most of the PRBs studied so far are based on ion intercalation. Herein, the use of conversion type active material α‐Fe2O3 for efficient and stable operation of Li‐PRBs is demonstrated. Cost‐effective solution processing method is used to synthesize α‐Fe2O3 nanorods (NRs), which form nanoporous morphology when blended with Multi‐walled carbon nanotubes / Phenyl‐C61 butyric acid methyl ester (MWCNT/PCBM) conducting additives to form photocathodes. α‐Fe2O3 NRs shown simultaneous solar energy harvesting in visible region of spectra, owing to its energy bandgap Eg ≈ 2.1 eV, and efficient Li‐ion storage via conversion reaction mechanism. Li‐PRB has shown photoconversion and storage efficiency of ≈1.988% when illuminated with blue LED (λex ≈ 470 nm) for large voltage window (0.8–2.57 V). The use of conversion type material like Fe2O3 in PRBs opens up new pathways to explore new materials and mechanisms for these emerging devices.

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“…In order to model MWCNT, we employed (4,4)@ (8,8)@ (12,12) three wall carbon nanotube. 51 Owing to the geometry of CNT, the interaction between Keggin molecules and CNTs is weak. Therefore, we have calculated the electronic structure of the CNT and the Keggin molecule separately and compared their energy states with respect to the vacuum level.…”

Section: Methodsmentioning

confidence: 99%

An amphiphilic polyoxometalate–CNT nanohybrid as a highly efficient enzyme-free electrocatalyst for H₂O₂ sensing

et al. 2022

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MWCNT synergy for boosting the electrochemical kinetics of V₂O₅ cathode for lithium-ion batteries

Abstract: V2O5/MWCNT hybrid system has been developed and investigated as cathode in LIBs. The developed electrode shows superior performance as compare to pristine V2O5 and V2O5/rGO hybrid structure due to the synergy between V2O5 and MWCNT.

Cited by 6 publications

References 48 publications

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe₂O₃ Photocathodes

An amphiphilic polyoxometalate–CNT nanohybrid as a highly efficient enzyme-free electrocatalyst for H₂O₂ sensing

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MWCNT synergy for boosting the electrochemical kinetics of V2O5 cathode for lithium-ion batteries

Abstract: V2O5/MWCNT hybrid system has been developed and investigated as cathode in LIBs. The developed electrode shows superior performance as compare to pristine V2O5 and V2O5/rGO hybrid structure due to the synergy between V2O5 and MWCNT.

Cited by 6 publications

References 48 publications

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe2O3 Photocathodes

An amphiphilic polyoxometalate–CNT nanohybrid as a highly efficient enzyme-free electrocatalyst for H2O2 sensing

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Product

Resources

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MWCNT synergy for boosting the electrochemical kinetics of V₂O₅ cathode for lithium-ion batteries

High Performance Photorechargeable Li‐Ion Batteries Based on Nanoporous Fe₂O₃ Photocathodes

An amphiphilic polyoxometalate–CNT nanohybrid as a highly efficient enzyme-free electrocatalyst for H₂O₂ sensing