Joke Hadermann
@uantwerpen.be
Department of Physics/Faculty of Sciences
University of Antwerp
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Saleh Gholam and Joke Hadermann
Elsevier BV
Romy Poppe and Joke Hadermann
Elsevier BV
Kathryn M. Neilson, Sarallah Hamtaei, Koosha Nassiri Nazif, Joshua M. Carr, Sepideh Rahimisheikh, Frederick U. Nitta, Guy Brammertz, Jeffrey L. Blackburn, Joke Hadermann, Krishna C. Saraswat,et al.
American Chemical Society (ACS)
Semiconducting transition metal dichalcogenides (TMDs) are promising for high-specific-power photovoltaics due to their desirable band gaps, high absorption coefficients, and ideally dangling-bond-free surfaces. Despite their potential, the majority of TMD solar cells to date are fabricated in a nonscalable fashion, with exfoliated materials, due to the lack of high-quality, large-area, multilayer TMDs. Here, we present the scalable, thickness-tunable synthesis of multilayer WSe2 films by selenizing prepatterned tungsten with either solid-source selenium at 900 °C or H2Se precursors at 650 °C. Both methods yield photovoltaic-grade, wafer-scale WSe2 films with a layered van der Waals structure and superior characteristics, including charge carrier lifetimes up to 144 ns, over 14× higher than those of any other large-area TMD films previously demonstrated. Simulations show that such carrier lifetimes correspond to ∼22% power conversion efficiency and ∼64 W g-1 specific power in a packaged solar cell, or ∼3 W g-1 in a fully packaged solar module. The results of this study could facilitate the mass production of high-efficiency multilayer WSe2 solar cells at low cost.
Matthias Quintelier, Amirhossein Hajizadeh, Alexander Zintler, Bruna F. Gonçalves, Roberto Fernández de Luis, Leili Esrafili Dizaji, Christophe M. L. Vande Velde, Stefan Wuttke, and Joke Hadermann
American Chemical Society (ACS)
Zhilin Liang, Maria Batuk, Fabio Orlandi, Pascal Manuel, Joke Hadermann, and Michael A. Hayward
American Chemical Society (ACS)
Binary metal hydrides can act as low-temperature reducing agents for complex oxides in the solid state, facilitating the synthesis of anion-deficient oxide or oxyhydride phases. The reaction of LaSrCoRuO6, with CaH2 in a sealed tube yields the face-centered cubic phase LaSrCoRuO3.2H1.9. The reaction with LiH under similar conditions converts LaSrCoRuO6 to a mixture of tetragonal LaSrCoRuO4.8H1.2 and cubic LaSrCoRuO3.3H2.13. The formation of the LaSrCoRuOxHy oxyhydride phases proceeds directly from the parent oxide, with no evidence for anion-deficient LaSrCoRuO6-x intermediates, in contrast with many other topochemically synthesized transition-metal oxyhydrides. However, the reaction between LaSrCoRuO6 and LiH under flowing argon yields a mixture of LaSrCoRuO5 and the infinite layer phase LaSrCoRuO4. The change to all-oxide products when reactions are performed under flowing argon is attributed to the lower hydrogen partial pressure under these conditions. The implications for the reaction mechanism of these topochemical transformations is discussed along with the role of the hydrogen partial pressure in oxyhydride synthesis. Magnetization measurements indicate the LaSrCoRuOxHy phases exhibit local moments on Co and Ru centers, which are coupled antiferromagnetically. In contrast, LaSrCoRuO4 exhibits ferromagnetic behavior with a Curie temperature above 350 K, which can be rationalized on the basis of superexchange coupling between the Co1+ and Ru2+ centers.
Margherita Cavallo, Melodj Dosa, Ryosuke Nakazato, Natale Gabriele Porcaro, Matteo Signorile, Matthias Quintelier, Joke Hadermann, Silvia Bordiga, Nataly Carolina Rosero-Navarro, Kiyoharu Tadanaga,et al.
Elsevier BV
Daphne Vandemeulebroucke, Maria Batuk, Amirhossein Hajizadeh, Myriam Wastiaux, Pascal Roussel, and Joke Hadermann
American Chemical Society (ACS)
Zhilin Liang, Maria Batuk, Fabio Orlandi, Pascal Manuel, Joke Hadermann, and Michael A. Hayward
Wiley
AbstractComplex transition‐metal oxides exhibit a wide variety of chemical and physical properties which are a strong function the local electronic states of the transition‐metal centres, as determined by a combination of metal oxidation state and local coordination environment. Topochemical reduction of the double perovskite oxide, LaSrCoRuO6, using Zr, yields LaSrCoRuO5. This reduced phase contains an ordered array of apex‐linked square‐based pyramidal Ru3+O5, square‐planar Co1+O4 and octahedral Co3+O6 units, consistent with the coordination‐geometry driven disproportionation of Co2+. Coordination‐geometry driven disproportionation of d7 transition‐metal cations (e.g. Rh2+, Pd3+, Pt3+) is common in complex oxides containing 4d and 5d metals. However, the weak ligand field experienced by a 3d transition‐metal such as cobalt leads to the expectation that d7+ Co2+ should be stable to disproportionation in oxide environments, so the presence of Co1+O4 and Co3+O6 units in LaSrCoRuO5 is surprising. Low‐temperature measurements indicate LaSrCoRuO5 adopts a ferromagnetically ordered state below 120 K due to couplings between S=1/2 Ru3+ and S=1 Co1+.
Zahida Malik, Sarah Broadley, Sebastian J. C. Herkelrath, Daniel W. Newbrook, Liam Kemp, George Rutt, Zoltán A. Gál, Jack N. Blandy, Joke Hadermann, Daniel W. Davies,et al.
Royal Society of Chemistry (RSC)
The optoelectronic properties of two layered copper oxyselenide compounds, with nominal composition Sr2ZnO2Cu2Se2 and Ba2ZnO2Cu2Se2, have been investigated to determine their suitability as p-type conductors.
Saeed Yari, Liam Bird, Sepideh Rahimisheikh, Albin Conde Reis, Mahsa Mohammad, Joke Hadermann, James Robinson, Paul R. Shearing, and Mohammadhosein Safari
Wiley
AbstractIn the quest for environmentally benign battery technologies, this study examines the microstructural and transport properties of water‐processed electrodes and compares them to conventionally formulated electrodes using the toxic solvent, N‐Methyl‐2‐pyrrolidone (NMP). Special focus is placed on sulfur electrodes utilized in lithium‐sulfur batteries for their sustainability and compatibility with diverse binder/solvent systems. The characterization of the electrodes by X‐ray micro‐computed tomography reveals that in polyvinylidene fluoride (PVDF)/NMP, sulfur particles tend to remain in large clusters but break down into finer particles in carboxymethyl cellulose‐styrene butadiene rubber (CMC‐SBR)/water and lithium polyacrylate (LiPAA)/water dispersions. The findings reveal that in the water‐based electrodes, the binder properties dictate the spatial arrangement of carbon particles, resulting in either thick aggregates with short‐range connectivity or thin films with long‐range connectivity among sulfur particles. Additionally, cracking is found to be particularly prominent in thicker water‐based electrodes, propagating especially in regions with larger particle agglomerates and often extending to cause local delamination of the electrodes. These microstructural details are shown to significantly impact the tortuosity and contact resistance of the sulfur electrodes and thereby affecting the cycling performance of the Li‐S battery cells.
Romy Poppe, Nikolaj Roth, Reinhard B. Neder, Lukas Palatinus, Bo Brummerstedt Iversen, and Joke Hadermann
International Union of Crystallography (IUCr)
Our study compares short-range order parameters refined from the diffuse scattering in single-crystal X-ray and single-crystal electron diffraction data. Nb0.84CoSb was chosen as a reference material. The correlations between neighbouring vacancies and the displacements of Sb and Co atoms were refined from the diffuse scattering using a Monte Carlo refinement in DISCUS. The difference between the Sb and Co displacements refined from the diffuse scattering and the Sb and Co displacements refined from the Bragg reflections in single-crystal X-ray diffraction data is 0.012 (7) Å for the refinement on diffuse scattering in single-crystal X-ray diffraction data and 0.03 (2) Å for the refinement on the diffuse scattering in single-crystal electron diffraction data. As electron diffraction requires much smaller crystals than X-ray diffraction, this opens up the possibility of refining short-range order parameters in many technologically relevant materials for which no crystals large enough for single-crystal X-ray diffraction are available.
Shunsuke Sasaki, Souvik Giri, Simon J. Cassidy, Sunita Dey, Maria Batuk, Daphne Vandemeulebroucke, Giannantonio Cibin, Ronald I. Smith, Philip Holdship, Clare P. Grey,et al.
Springer Science and Business Media LLC
AbstractTopochemistry enables step-by-step conversions of solid-state materials often leading to metastable structures that retain initial structural motifs. Recent advances in this field revealed many examples where relatively bulky anionic constituents were actively involved in redox reactions during (de)intercalation processes. Such reactions are often accompanied by anion-anion bond formation, which heralds possibilities to design novel structure types disparate from known precursors, in a controlled manner. Here we present the multistep conversion of layered oxychalcogenides Sr2MnO2Cu1.5Ch2 (Ch = S, Se) into Cu-deintercalated phases where antifluorite type [Cu1.5Ch2]2.5- slabs collapsed into two-dimensional arrays of chalcogen dimers. The collapse of the chalcogenide layers on deintercalation led to various stacking types of Sr2MnO2Ch2 slabs, which formed polychalcogenide structures unattainable by conventional high-temperature syntheses. Anion-redox topochemistry is demonstrated to be of interest not only for electrochemical applications but also as a means to design complex layered architectures.
Fulya Ulu Okudur, Maria Batuk, Joke Hadermann, Mohammadhosein Safari, Dries De Sloovere, Satish Kumar Mylavarapu, Bjorn Joos, Jan D'Haen, Marlies K. Van Bael, and An Hardy
Royal Society of Chemistry (RSC)
LNMO powder surface was modified with amorphous Li–Ti–O. Increase in electrochemically active surface area, as well as improved HF-scavenging enhanced its electrochemical performance.
Andreas Paulus, Mylène Hendrickx, Selma Mayda, Maria Batuk, Gunter Reekmans, Miriam von Holst, Ken Elen, Artem M. Abakumov, Peter Adriaensens, Dirk Lamoen,et al.
American Chemical Society (ACS)
Jacinthe Gamon, Jean-Marc Bassat, Antoine Villesuzanne, Mathieu Duttine, Maria Batuk, Daphne Vandemeulebroucke, Joke Hadermann, Fouad Alassani, François Weill, Etienne Durand,et al.
American Chemical Society (ACS)
Sr2FeO3F, an oxyfluoride compound with an n = 1 Ruddlesden-Popper structure, was identified as a potential interesting mixed ionic and electronic conductor (MIEC). The phase can be synthesized under a range of different pO2 atmospheres, leading to various degrees of fluorine for oxygen substitution and Fe4+ content. A structural investigation and thorough comparison of both argon- and air-synthesized compounds were performed by combining high-resolution X-ray and electron diffraction, high-resolution scanning transmission electron microscopy, Mössbauer spectroscopy, and DFT calculations. While the argon-synthesized phase shows a well-behaved O/F ordered structure, this study revealed that oxidation leads to averaged large-scale anionic disorder on the apical site. In the more oxidized Sr2FeO3.2F0.8 oxyfluoride, containing 20% of Fe4+, two different Fe positions can be identified with a 32%/68% occupancy (P4/nmm space group). This originates due to the presence of antiphase boundaries between ordered domains within the grains. Relations between site distortion and valence states as well as stability of apical anionic sites (O vs F) are discussed. This study paves the way for further studies on both ionic and electronic transport properties of Sr2FeO3.2F0.8 and its use in MIEC-based devices, such as solid oxide fuel cells.
Nadezhda V. Vladimirova, Alexander S. Frolov, Jaime Sánchez-Barriga, Oliver J. Clark, Fumihiko Matsui, Dmitry Yu. Usachov, Matthias Muntwiler, Carolien Callaert, Joke Hadermann, Vera S. Neudachina,et al.
Elsevier BV
Svetlana M. Posokhova, Vladimir A. Morozov, Dina V. Deyneko, Boris S. Redkin, Dmitry A. Spassky, Vitali Nagirnyi, Alexei A. Belik, Joke Hadermann, Erzhena T. Pavlova, and Bogdan I. Lazoryak
Royal Society of Chemistry (RSC)
K5Eu(MoO4)4 (KEMO) was prepared by different methods: solid state and sol–gel synthesis and the Czochralski growth technique. The luminescent properties depend on the synthesis techniques. KEMO crystal demonstrates a maximum quantum yield of 66.5%.
Ryosuke NAKAZATO, Keeko MATSUMOTO, Noboru YAMAGUCHI, Margherita CAVALLO, Valentina CROCELLÀ, Francesca BONINO, Matthias QUINTELIER, Joke HADERMANN, Nataly Carolina ROSERO-NAVARRO, Akira MIURA,et al.
The Electrochemical Society of Japan
Maria Batuk, Daphne Vandemeulebroucke, Monica Ceretti, Werner Paulus, and Joke Hadermann
Royal Society of Chemistry (RSC)
Using in situ 3D electron diffraction on SrFeOx nanocrystals during the solid–gas redox reaction, we uncovered oxygen-vacancy ordering and domain formation not observable by in situ solid–gas bulk diffraction techniques.
Clara López-García, Stefano Canossa, Joke Hadermann, Giulio Gorni, Freddy E. Oropeza, Víctor A. de la Peña O’Shea, Marta Iglesias, M. Angeles Monge, Enrique Gutiérrez-Puebla, and Felipe Gándara
American Chemical Society (ACS)
A novel synthetic approach is described for the targeted preparation of multivariate metal–organic frameworks (MTV-MOFs) with specific combinations of metal elements. This methodology is based on the use of molecular complexes that already comprise desired metal-atom combinations, as building units for the MTV-MOF synthesis. These units are transformed into the MOF structural constituents through a ligand/linker exchange process that involves structural modifications while preserving their originally encoded atomic combination. Thus, through the use of heterometallic ring-shaped molecules combining gallium and nickel or cobalt, we have obtained MOFs with identical combinations of the metal elements, now incorporated in the rod-shaped secondary building unit, as confirmed with a combination of X-ray and electron diffraction, electron microscopy, and X-ray absorption spectroscopy techniques.
Romy Poppe, Daphne Vandemeulebroucke, Reinhard B. Neder, and Joke Hadermann
International Union of Crystallography (IUCr)
In contrast to perfectly periodic crystals, materials with short-range order produce diffraction patterns that contain both Bragg reflections and diffuse scattering. To understand the influence of short-range order on material properties, current research focuses increasingly on the analysis of diffuse scattering. This article verifies the possibility to refine the short-range order parameters in submicrometre-sized crystals from diffuse scattering in single-crystal electron diffraction data. The approach was demonstrated on Li1.2Ni0.13Mn0.54Co0.13O2, which is a state-of-the-art cathode material for lithium-ion batteries. The intensity distribution of the 1D diffuse scattering in the electron diffraction patterns of Li1.2Ni0.13Mn0.54Co0.13O2 depends on the number of stacking faults and twins in the crystal. A model of the disorder in Li1.2Ni0.13Mn0.54Co0.13O2 was developed and both the stacking fault probability and the percentage of the different twins in the crystal were refined using an evolutionary algorithm in DISCUS. The approach was applied on reciprocal space sections reconstructed from 3D electron diffraction data since they exhibit less dynamical effects compared with in-zone electron diffraction patterns. A good agreement was achieved between the calculated and the experimental intensity distribution of the diffuse scattering. The short-range order parameters in submicrometre-sized crystals can thus successfully be refined from the diffuse scattering in single-crystal electron diffraction data using an evolutionary algorithm in DISCUS.
Alexander S. Frolov, Carolien Callaert, Maria Batuk, Joke Hadermann, Andrey A. Volykhov, Anna P. Sirotina, Matteo Amati, Luca Gregoratti, and Lada V. Yashina
Royal Society of Chemistry (RSC)
As a semiconductor ferroelectric, GeTe has become a focus of renewed attention due to the recent discovery of giant Rashba splitting. For the future applications, the knowledge of growth kinetics and structure of oxide layer is of great importance.
Bradley C. Sheath, Xiaoyu Xu, Pascal Manuel, Joke Hadermann, Maria Batuk, John O’Sullivan, Ruy S. Bonilla, and Simon J. Clarke
American Chemical Society (ACS)
Two novel chromium oxide arsenide materials have been synthesized, Sr2CrO2Cr2OAs2 (i.e., Sr2Cr3As2O3) and Sr2CrO3CrAs (i.e., Sr2Cr2AsO3), both of which contain chromium ions in two distinct layers. Sr2CrO2Cr2OAs2 was targeted following electron microscopy measurements on a related phase. It crystallizes in the space group P4/mmm and accommodates distorted CrO4As2 octahedra containing Cr2+ and distorted CrO2As4 octahedra containing Cr3+. In contrast, Sr2CrO3CrAs incorporates Cr3+ in CrO5 square-pyramidal coordination in [Sr2CrO3]+ layers and Cr2+ ions in CrAs4 tetrahedra in [CrAs]− layers and crystallizes in the space group P4/nmm. Powder neutron diffraction data reveal antiferromagnetic ordering in both compounds. In Sr2CrO3CrAs the Cr2+ moments in the [CrAs]− layers exhibit long-range ordering, while the Cr3+ moments in the [Sr2CrO3]+ layers only exhibit short-range ordering. However, in Sr2CrO2Cr2OAs2, both the Cr2+ moments in the CrO4As2 environments and the Cr3+ moments in the CrO2As4 polyhedra are long-range-ordered below 530(10) K. Above this temperature, only the Cr3+ moments are ordered with a Néel temperature slightly in excess of 600 K. A subtle structural change is evident in Sr2CrO2Cr2OAs2 below the magnetic ordering transitions.
Mylène Hendrickx, Andreas Paulus, Maria A. Kirsanova, Marlies K. Van Bael, Artem M. Abakumov, An Hardy, and Joke Hadermann
MDPI AG
Electrochemical energy storage plays a vital role in combating global climate change. Nowadays lithium-ion battery technology remains the most prominent technology for rechargeable batteries. A key performance-limiting factor of lithium-ion batteries is the active material of the positive electrode (cathode). Lithium- and manganese-rich nickel manganese cobalt oxide (LMR-NMC) cathode materials for Li-ion batteries are extensively investigated due to their high specific discharge capacities (>280 mAh/g). However, these materials are prone to severe capacity and voltage fade, which deteriorates the electrochemical performance. Capacity and voltage fade are strongly correlated with the particle morphology and nano- and microstructure of LMR-NMCs. By selecting an adequate synthesis strategy, the particle morphology and structure can be controlled, as such steering the electrochemical properties. In this manuscript we comparatively assessed the morphology and nanostructure of LMR-NMC (Li1.2Ni0.13Mn0.54Co0.13O2) prepared via an environmentally friendly aqueous solution-gel and co-precipitation route, respectively. The solution-gel (SG) synthesized material shows a Ni-enriched spinel-type surface layer at the {200} facets, which, based on our post-mortem high-angle annual dark-field scanning transmission electron microscopy and selected-area electron diffraction analysis, could partly explain the retarded voltage fade compared to the co-precipitation (CP) synthesized material. In addition, deviations in voltage fade and capacity fade (the latter being larger for the SG material) could also be correlated with the different particle morphology obtained for both materials.
Manoj Vishwakarma, Yogita Batra, Joke Hadermann, Aditya Singh, Abhishek Ghosh, and B. R. Mehta
ACS Applied Energy Materials American Chemical Society (ACS)