Economical and highly efficient Pt-free counter electrode for dye-sensitized solar cells

Ma, Liansheng; Kang, Jingxin; Liu, Yong; He, Haifeng

doi:10.1016/j.colsurfa.2019.01.010

Cited by 11 publications

(5 citation statements)

References 53 publications

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“…After nickel doping, the I D /I G ratios decreased, indicating the conversion of the disordered carbon structure into the ordered graphitic crystal structure. Therefore, the graphitization degree of PCNF−Ni is significantly higher than that of CNF [67–70] . The high graphitization property will facilitate the transport of electrons and also the uniform deposition of lithium.…”

Section: Resultsmentioning

confidence: 99%

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Nitrogen‐doped Porous Carbon Nanofibers Decorated with Nickel Nanoparticles for Unlocking Low‐cost Structural Lithium Metal Anodes

Chen

et al. 2022

ChemistrySelect

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Lithium metal anode has received increasing attention. However, safety issues arising from lithium dendrite growth have limited the commercialization of lithium metal anodes. Herein, a porous carbon nanofiber framework decorated with nickel nanoparticles was designed as a 3D conductive host by simple electrospinning technique to solve the above problem. Uniformly dispersed nickel nanoparticles on N-doped carbon fibers can expose more active sites to trap lithium ions. The design of the Ni/N co-doping structure can effectively improve its lithiophilicity. In addition, the 3D porous conductive structure facilitates electron transport and can effectively decrease the local current density to suppress the formation and generation of lithium dendrites. The combined results of experiments and density functional theory calculations show that carbon nanofibers decorated with Ni nanoparticles have stronger adsorption ability for lithium, thus resulting in more uniform plating. This work provides inspiration for designing low-cost and dendrite-free structural lithium metal anode hosts.

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Section: Resultsmentioning

confidence: 99%

“…Therefore, the graphitization degree of PCNFÀ Ni is significantly higher than that of CNF. [67][68][69][70] The high graphitization property will facilitate the transport of electrons and also the uniform deposition of lithium.…”

Section: Chemistryselectmentioning

confidence: 99%

Nitrogen‐doped Porous Carbon Nanofibers Decorated with Nickel Nanoparticles for Unlocking Low‐cost Structural Lithium Metal Anodes

Chen

et al. 2022

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“…However, the exorbitant cost and low electrochemical stability of Pt, fuelled the demand for a more cost-effective, corrosionresistant, Pt-free counter electrode material (Lu et al, 2019b), (Jiang et al, 2019). In this regard, Ma et al (Ma et al, 2019), has developed a Pt free CNF with Fe-Co nanoparticles by electrospinning followed by post-treatments as a counter electrode for DSSC, and the photovoltaic efficiency of the electrode was 98.5% than that of the Pt electrode. They have attributed this enhancement to the good conductivity of the Fe-Co/CNF electrode, the increased contact area between the electrolyte and the electrode due to the 3D mesoporous network and the higher number of active sites due to the high surface area of fiber structures.…”

Section: Application Of Metal/metal Oxide Doped Electrospun Nanofiber...mentioning

confidence: 99%

Application of Metal/Metal Oxide Doped Electrospun Nanofiber Membranes in Sustainable Catalysis

et al. 2022

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The unsustainability of the production of catalysts due to limited resources and higher energy demands makes it critical to explore and reengineer new catalytic materials for future applications. Woefully, the unrelenting demand for the metals/metal oxides increases both the financial and environmental cost, particularly in mining and synthesis, rendering consumption unsustainable in its current form. In this context, electrospinning offers a new template for designing sustainable ways of minimizing the higher loading of catalysts and recyclability. In this context, metals/metal oxide doped electrospun membranes have grasped a great scientific interest as sustainable catalysts due to their enhanced catalytic activity and synergistic structure-property relationship of the doped material and the matrix. More specifically, the selectivity arising from the electronic properties and quantum mechanical interactions at the nanoscale of metal/metal oxide nanoparticles coupled with interactions at the electrospun membrane interfaces lead to such enhanced properties. This review article summarizes the applications of metals/metal doped electrospun membranes in different aspects of catalysis, such as thermocatalysis, photocatalysis, organocatalysis and electrocatalysis, with a particular focus on their sustainability. Keywords: Sustainable catalysis, metal/metal oxide doped catalysts, electrospinning, organocatalysis, photocatalysis

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“…Zhang et al[12] investigated efficient and transparent polymers for dye-sensitized solar cells. They found that the polymer made from a mixed acetonitrile-dichloromethane solvent showed enhanced catalytic activity for redox reactions compared with that from a single solvent.Multiwalled carbon nanotubes (MWCNTs) [13][14][15], graphenes [16][17][18][19][20][21][22][23], metals or metal nanowires [24,25], and hybrids of these [26,27] are emerging as potential alternatives, owing to their large surface areas.Ma et al [28] found that (Fe-Co)-CNFs had high electrocatalytic activity for the I 3 − /I − redox couple. These can be used as high-efficiency and low-cost counter electrodes for DSSCs which means the graphite characteristics of fibers make them electronically conducting.…”

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confidence: 99%

“…Ma et al [28] found that (Fe-Co)-CNFs had high electrocatalytic activity for the I 3 − /I − redox couple. These can be used as high-efficiency and low-cost counter electrodes for DSSCs which means the graphite characteristics of fibers make them electronically conducting.…”

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confidence: 99%

Photovoltaic Characteristics of Multiwalled Carbon Nanotube Counter-Electrode Materials for Dye-Sensitized Solar Cells Produced by Chemical Treatment and Addition of Dispersant

et al. 2019

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Multiwalled carbon nanotubes (MWCNTs) have excellent electrical conductivity and good chemical stability, and are used as counter electrodes in dye-sensitized solar cells (DSSCs). The counter electrodes collect electrons from the external circuit and catalyze the redox reaction in the electrolyte. Electrocatalysis is an important step for generating energy from triiodide reduction in DSSCs. In this study, chemically treated MWCNTs were investigated for improving the photovoltaic performance of DSSCs. The MWCNTs were modified through chemical oxidation with sulfuric acid/nitric acid (H2SO4/HNO3) or potassium persulfate/sodium hydroxide (K2S2O8/NaOH). Nanocellulose (CNC) was used as a dispersant to improve the photovoltaic performance and dispersibility as an alternative material for counter electrodes in DSSCs. The counter electrodes were prepared on fluorine-doped tin oxide (FTO) glass substrates by spin coating nanofluids. Morphological and structural investigations were performed using scanning transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, and Raman spectroscopy. The electrical conductivity and UV light absorption of the DSSCs were analyzed to evaluate their photovoltaic performance. The results of these analyses showed that chemical functionalization and addition of CNC were effective for increasing the electrical conductivity and UV light absorption. Finally, all result trends were the same. Increasing the dispersibility of the counter electrode was found to improve the reduction of I3− at the interface between the MWCNTs and the electrolyte, thereby, improving the energy conversion efficiency.

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Economical and highly efficient Pt-free counter electrode for dye-sensitized solar cells

Cited by 11 publications

References 53 publications

Nitrogen‐doped Porous Carbon Nanofibers Decorated with Nickel Nanoparticles for Unlocking Low‐cost Structural Lithium Metal Anodes

Nitrogen‐doped Porous Carbon Nanofibers Decorated with Nickel Nanoparticles for Unlocking Low‐cost Structural Lithium Metal Anodes

Application of Metal/Metal Oxide Doped Electrospun Nanofiber Membranes in Sustainable Catalysis

Photovoltaic Characteristics of Multiwalled Carbon Nanotube Counter-Electrode Materials for Dye-Sensitized Solar Cells Produced by Chemical Treatment and Addition of Dispersant

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