| 1. |
- Kumar, Pankaj, et al.
(författare)
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All-Inorganic Hydrothermally Processed Semitransparent Sb2S3 Solar Cells with CuSCN as the Hole Transport Layer
- 2024
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Ingår i: ACS Applied Energy Materials. - : American Chemical Society. - 2574-0962. ; 7:4, s. 1421-1432
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Tidskriftsartikel (refereegranskat)abstract
- Published by American Chemical Society.An inorganic wide-bandgap hole transport layer (HTL), copper(I) thiocyanate (CuSCN), is employed in inorganic planar hydrothermally deposited Sb2S3 solar cells. With excellent hole transport properties and uniform compact morphology, the solution-processed CuSCN layer suppresses the leakage current and improves charge selectivity in an n-i-p-type solar cell structure. The device without the HTL (FTO/CdS/Sb2S3/Au) delivers a modest power conversion efficiency (PCE) of 1.54%, which increases to 2.46% with the introduction of CuSCN (FTO/CdS/Sb2S3/CuSCN/Au). This PCE is a significant improvement compared with the previous reports of planar Sb2S3 solar cells employing CuSCN. CuSCN is therefore a promising alternative to expensive and inherently unstable organic HTLs. In addition, CuSCN makes an excellent optically transparent (with average transmittance >90% in the visible region) and shunt-blocking HTL layer in pinhole-prone ultrathin(<100 nm) semitransparent absorber layers grown by green and facile hydrothermal deposition. A semitransparent device is fabricated using an ultrathin Au layer (∼10 nm) with a PCE of 2.13% and an average visible transmittance of 13.7%.
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| 2. |
- Nkosi, Funeka P., et al.
(författare)
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Understanding Lithium-Ion Conductivity in NASICON-Type Polymer-in-Ceramic Composite Electrolytes
- 2024
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Ingår i: ACS Applied Energy Materials. - : American Chemical Society (ACS). - 2574-0962. ; 7:10, s. 4609-4619
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Tidskriftsartikel (refereegranskat)abstract
- Composite electrolytes comprising distinctive polyether (PEO) or polyester (PCL, P(CL-co-TMC)) polymers in combination with a high loading of Li1.4Al0.4Ti1.6(PO4)3 NASICON-type ceramic powders (LATP, 70 wt %) are investigated to gain insights into the limitations of their ion conductivity in resulting polymer-in-ceramic solid-state electrolyte systems. Here, LATP constitutes an advantageous ceramic Li-ion conductor with fair ionic conductivity that does not immediately suffer from limitations arising from interface issues due to the detrimental formation of surface species (e.g., Li2CO3) in contact with air and/or surrounding polymers. The Li-ion transport in all these composite electrolytes is found to follow a slow-motion regime in the polymer matrix, regardless of the nature of the polymer used. Interestingly, the weakly Li-coordinating polyester-based polymers PCL and P(CL-co-TMC) exhibit an exchange of Li+ ions between the polymer and ceramic phases and high Li-ion transference numbers compared to the polyether PEO matrix, which has strong Li–polymer coordination. LATP particle agglomeration is nevertheless observed in all the composite electrolytes, and this most likely represents a dominating cause for the lower Li-ion conductivity values of these composites when compared to those of their solid polymer electrolyte (SPE) counterparts. These findings add another step toward the development of functional composite electrolytes for all-solid-state batteries.
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| 3. |
- Sahu, Tushar Kanta, et al.
(författare)
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Electrochemical Seawater Oxidation by (Ni,Co)3O4-RuO2 Catalysts at Neutral pH in a Forward Osmosis Cell
- 2024
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Ingår i: ACS Applied Energy Materials. - 2574-0962. ; 7:10, s. 4445-4453
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Tidskriftsartikel (refereegranskat)abstract
- Using seawater to generate green hydrogen through electrolysis is a promising strategy for energy conversion. However, direct seawater splitting to form green hydrogen suffers drawbacks from electrode corrosion due to chlorine and other impurities. Herein, we demonstrate direct electrochemical seawater splitting using a forward osmosis membrane coupled with an electrolysis cell. By using this cell, high activity (270 mV at 10 mA/cm(2)) and decent stability (up to 6 days) are achieved by utilizing RuO2-(Ni,Co)(3)O-4 catalyst in a neutral electrolyte. This system is further studied in various electrolytes under neutral to alkaline conditions. This proof of concept shows that seawater splitting could be coupled with semipermeable membranes, allowing for direct utilization of seawater without pretreatment or purification and evading the challenges posed by impurities.
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| 4. |
- White, Jai, et al.
(författare)
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Synergistic Bimetallic PdNi Nanoparticles : Enhancing Glycerol Electrooxidation While Preserving C3 Product Selectivity
- 2024
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Ingår i: ACS Applied Energy Materials. - 2574-0962. ; 7:5, s. 1802-1813
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Tidskriftsartikel (refereegranskat)abstract
- Electrochemical conversion of glycerol offers a promising route to synthesize value-added glycerol oxidation products (GOPs) from an abundant biomass-based resource. While noble metals provide a low overpotential for the glycerol electrooxidation reaction (GEOR) and high selectivity toward three-carbon (C3) GOPs, their efficiency and cost can be improved by incorporating non-noble metals. Here, we introduce an effective strategy to enhance the performance of Pd nanoparticles for the GEOR by alloying them with Ni. The resulting PdNi nanoparticles show a significant increase in both specific activity (by almost 60%) and mass activity (by almost 35%) during the GEOR at 40 °C. Additionally, they exhibit higher resistance to deactivation compared to pure Pd. Analysis of the GOPs reveals that the addition of Ni into Pd does not compromise the selectivity, with glycerate remaining at around 60% of the product fraction and the other major product being lactate at around 30%. Density functional theory calculations confirm the reaction pathways and the basis for the higher activity of PdNi. This study demonstrates a significant increase in the GEOR catalytic performance while maintaining the selectivity for C3 GOPs, using a more cost-effective nanocatalyst.
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| 5. |
- Zhang, Xingyan, 1987-, et al.
(författare)
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Phosphide-Enhanced Hierarchical NiMoO4 Composite in Binder-Free Ni-Electrodes for High-Capacity Aqueous Rechargeable NiZn Batteries
- 2024
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Ingår i: ACS Applied Energy Materials. - 2574-0962. ; 7:2, s. 517-527
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Tidskriftsartikel (refereegranskat)abstract
- A growth strategy is described where a multidimensional P(Ni, Fe) nanoarray electrode is fabricated by phosphiding NiMoO4 nanoflakes modified with a Ni-based Prussian blue analogue induced by in situ self-sacrificial formation. The generated electrode exhibits a specific capacity of 501.8 mAh g–1 at 1 A g–1, owing to the unique overlapping cross-stacked network structure with increased surface- and interface-active sites and enhanced conductivity. This is about 2 times larger than those of the NiMoO4 (200.2 mAh g–1) and NiMoO4/Ni-Prussian blue analogue (NiMoO4/Ni-PBA) (217.3 mAh g–1) electrodes. The battery cell assembled with the obtained P(Ni, Fe) nanoarray electrode and a Zn plate as the counter electrode shows a high energy density of 962.6 Wh kg–1 at a power density of 870 W kg–1. This demonstrates the potential of NiMoO4-based materials for NiZn battery applications and gives insight into the design of electrode materials by controlling the surface/interface in next-generation high-performing NiZn batteries.
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