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Publications (7 of 7) Show all publications
Benedek, P., Forslund, O. K., Nocerino, E., Yazdani, N., Matsubara, N., Sassa, Y., . . . Wood, V. (2020). Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials. ACS Applied Materials and Interfaces, 12(14), 16243-16249
Open this publication in new window or tab >>Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials
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2020 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 12, no 14, p. 16243-16249Article in journal (Refereed) Published
Abstract [en]

Detailed understanding of charge diffusion processes in a lithium-ion battery is crucial to enable its systematic improvement. Experimental investigation of diffusion at the interface between active particles and the electrolyte is challenging but warrants investigation as it can introduce resistances that, for example, limit the charge and discharge rates. Here, we show an approach to study diffusion at interfaces using muon spin spectroscopy. By performing measurements on LiFePO4 platelets with different sizes, we determine how diffusion through the LiFePO4 (010) interface differs from that in the center of the particle (i.e., bulk diffusion). We perform ab initio calculations to aid the understanding of the results and show the relevance of our interfacial diffusion measurement to electrochemical performance through cyclic voltammetry measurements. These results indicate that surface engineering can be used to improve the performance of lithium-ion batteries.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2020
Keywords
solid-state diffusion, lithium-ion batteries, muon spin spectroscopy, ab initio simulations, cyclic voltammetry, LiFePO4
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-273129 (URN)10.1021/acsami.9b21470 (DOI)000526583500027 ()32163263 (PubMedID)2-s2.0-85083084739 (Scopus ID)
Note

QC 20200526

Available from: 2020-05-26 Created: 2020-05-26 Last updated: 2020-05-26Bibliographically approved
Umegaki, I., Higuchi, Y., Nozaki, H., Kondo, Y., Oka, H., Makimura, Y., . . . Sugiyama, J. (2019). Battery Materials Research with Muon Beam. In: Proceedings of the 3rd International Symposium of Quantum Beam Science at Ibaraki University "Quantum Beam Science in Biology and Soft Materials (ISQBSS2018): . Paper presented at the 3rd International Symposium of Quantum Beam Science at Ibaraki University "Quantum Beam Science in Biology and Soft Materials (ISQBSS2018)". Physical society of Japan, 25, Article ID 011009.
Open this publication in new window or tab >>Battery Materials Research with Muon Beam
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2019 (English)In: Proceedings of the 3rd International Symposium of Quantum Beam Science at Ibaraki University "Quantum Beam Science in Biology and Soft Materials (ISQBSS2018), Physical society of Japan, 2019, Vol. 25, article id 011009Conference paper, Published paper (Refereed)
Abstract [en]

We applied a positive muon spin rotation and relaxation (μ+SR) technique to battery materials research by investigating Li diffusion in cathode and electrolyte materials. Recently, we have found that Li diffusion in graphite, which is commonly used as an anode material in Li-ion batteries, is detectable with μ+SR. Following upon the initial μ+SR measurements on the Li intercalated graphites, C6Li and C12Li, μ+SR spectra were also measured for C12Li0.92 and C18Li0.90 posing a slightly different occupancy in the same stage structure as those of C6Li and C12Li. The temperature dependence of diffusive nature in C12Li0.92 and C18Li0.90 was found to be similar in nature to those in C6Li and C12Li. Such a diffusion was found to start to occur approximately by 50 K lower than those of C6Li and C12Li. This suggests that Li starts to diffuse at lower temperatures in the nonstoichiometric Li intercalated graphite samples than that in the stoichiometric samples.

Place, publisher, year, edition, pages
Physical society of Japan, 2019
Series
JPS Conference Proceedings ; 25
National Category
Condensed Matter Physics
Research subject
Physics, Material and Nano Physics
Identifiers
urn:nbn:se:kth:diva-267249 (URN)10.7566/JPSCP.25.011009 (DOI)
Conference
the 3rd International Symposium of Quantum Beam Science at Ibaraki University "Quantum Beam Science in Biology and Soft Materials (ISQBSS2018)"
Note

QC 20200205

Available from: 2020-02-05 Created: 2020-02-05 Last updated: 2020-02-05Bibliographically approved
Sugiyama, J., Umegaki, I., Matsumoto, M., Miwa, K., Nozaki, H., Higuchi, Y., . . . Brewer, J. H. (2019). Desorption reaction in MgH 2 studied with in situ μ + SR. Sustainable Energy and Fuels, 3(4), 956-964
Open this publication in new window or tab >>Desorption reaction in MgH 2 studied with in situ μ + SR
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2019 (English)In: Sustainable Energy and Fuels, ISSN 2398-4902, Vol. 3, no 4, p. 956-964Article in journal (Refereed) Published
Abstract [en]

In order to study the mechanism determining the desorption temperature (T d ) of hydrogen storage materials, we have measured positive muon spin rotation and relaxation (μ + SR) in MgH 2 over a wide temperature range including its T d . The pressure in the sample cell due to desorbed H 2 was measured in parallel with the μ + SR measurements under static conditions. Such in situ μ + SR measurements revealed that hydrogen starts to diffuse in MgH 2 well below T d . This indicates the important role of hydrogen diffusion in accelerating the desorption reaction by removing the reaction product, i.e. H 2 , from the reaction system.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019
National Category
Other Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-251906 (URN)10.1039/c8se00568k (DOI)000467219500019 ()2-s2.0-85063419615 (Scopus ID)
Note

QC 20190527

Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-29Bibliographically approved
Kobayashi, S., Katayama, N., Manjo, T., Ueda, H., Michioka, C., Sugiyama, J., . . . Sawa, H. (2019). Linear Trimer Formation with Antiferromagnetic Ordering in 1T-CrSe2 Originating from Peierls-like Instabilities and Interlayer Se-Se Interactions. Inorganic Chemistry, 58(21), 14304-14315
Open this publication in new window or tab >>Linear Trimer Formation with Antiferromagnetic Ordering in 1T-CrSe2 Originating from Peierls-like Instabilities and Interlayer Se-Se Interactions
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2019 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 58, no 21, p. 14304-14315Article in journal (Refereed) Published
Abstract [en]

Anomalous successive structural transitions in layered 1T-CrSe2 with an unusual Cr4+ valency were investigated by synchrotron X-ray diffraction. 1T-CrSe2 exhibits dramatic structural changes in in-plane Cr-Cr and interlayer Se-Se distances, which originate from two interactions: (i) in-plane Cr-Cr interactions derived from Peierls-like trimerization instabilities on the orbitally assisted one-dimensional chains and (ii) interlayer Se-Se interactions through p-p hybridization. As a result, 1T-CrSe2 has the unexpected ground state of an antiferromagnetic metal with multiple Cr linear trimers with three-center-two-electron sigma bonds. Interestingly, partial substitution of Se for S atoms in 1T-CrSe2 changes the ground state from an antiferromagnetic metal to an insulator without long-range magnetic ordering, which is due to the weakening of interlayer interactions between anions. The unique low-temperature structures and electronic states of this system are determined by the competition and cooperation of in-plane Cr-Cr and interlayer Se-Se interactions.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-264337 (URN)10.1021/acs.inorgchem.9b00186 (DOI)000494894400005 ()30964663 (PubMedID)2-s2.0-85064759165 (Scopus ID)
Note

QC 20191126. QC 20200109

Available from: 2019-11-26 Created: 2019-11-26 Last updated: 2020-01-09Bibliographically approved
Forslund, O. K., Andreica, D., Sassa, Y., Nozaki, H., Umegaki, I., Nocerino, E., . . . Månsson, M. (2019). Magnetic phase diagram of K 2 Cr 8 O 16 clarified by high-pressure muon spin spectroscopy. Scientific Reports, 9(1), Article ID 1141.
Open this publication in new window or tab >>Magnetic phase diagram of K 2 Cr 8 O 16 clarified by high-pressure muon spin spectroscopy
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, no 1, article id 1141Article in journal (Refereed) Published
Abstract [en]

The K 2 Cr 8 O 16 compound belongs to a series of quasi-1D compounds with intriguing magnetic properties that are stabilized through a high-pressure synthesis technique. In this study, a muon spin rotation, relaxation and resonance (μ + SR) technique is used to investigate the pressure dependent magnetic properties up to 25 kbar. μ + SR allows for measurements in true zero applied field and hereby access the true intrinsic material properties. As a result, a refined temperature/pressure phase diagram is presented revealing a novel low temperature/high pressure (p C1 = 21 kbar) transition from a ferromagnetic insulating to a high-pressure antiferromagnetic insulator. Finally, the current study also indicates the possible presence of a quantum critical point at p C2 ~ 33 kbar where the magnetic order in K 2 Cr 8 O 16 is expected to be fully suppressed even at T = 0 K.

Place, publisher, year, edition, pages
Nature Publishing Group, 2019
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-246400 (URN)10.1038/s41598-018-37844-5 (DOI)000457616300030 ()30718649 (PubMedID)2-s2.0-85061061260 (Scopus ID)
Note

QC 20190401

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-04-01Bibliographically approved
Jana, S., Aich, P., Kumar, P. A., Forslund, O. K., Nocerino, E., Pomjakushin, V., . . . Ray, S. (2019). Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1-xCaxNiReO6. Scientific Reports, 9, Article ID 18296.
Open this publication in new window or tab >>Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1-xCaxNiReO6
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 18296Article in journal (Refereed) Published
Abstract [en]

The magnetic ground states in highly ordered double perovskites LaSr1-xCaxNiReO6 (x = 0.0, 0.5, 1.0) are studied in view of the Goodenough-Kanamori rules of superexchange interactions in this paper. In LaSrNiReO6, Ni and Re sublattices are found to exhibit curious magnetic states separately, but no long range magnetic ordering is achieved. The magnetic transition at similar to 255 K is identified with the independent Re sublattice magnetic ordering. Interestingly, the sublattice interactions are tuned by modifying the Ni-O-Re bond angles through Ca doping. Upon Ca doping, the Ni and Re sublattices start to display a ferrimagnetically ordered state at low temperature. The neutron powder diffraction data reveals long range ferrimagnetic ordering of the Ni and Re magnetic sublattices along the crystallographic b-axis. The transition temperature of the ferrimagnetic phase increases monotonically with increasing Ca concentration.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-266272 (URN)10.1038/s41598-019-54427-0 (DOI)000501437300001 ()31797876 (PubMedID)2-s2.0-85076044540 (Scopus ID)
Note

QC 20200108

Available from: 2020-01-08 Created: 2020-01-08 Last updated: 2020-01-08Bibliographically approved
Horio, M., Hauser, K., Sassa, Y., Mingazheva, Z., Sutter, D., Kramer, K., . . . Chang, J. (2018). Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates. Physical Review Letters, 121(7), Article ID 077004.
Open this publication in new window or tab >>Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates
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2018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 7, article id 077004Article in journal (Refereed) Published
Abstract [en]

We present a soft x-ray angle-resolved photoemission spectroscopy study of overdoped high-temperature superconductors. In-plane and out-of-plane components of the Fermi surface are mapped by varying the photoemission angle and the incident photon energy. No k(z) dispersion is observed along the nodal direction, whereas a significant antinodal k(z) dispersion is identified for La-based cuprates. Based on a tight-binding parametrization, we discuss the implications for the density of states near the van Hove singularity. Our results suggest that the large electronic specific heat found in overdoped La2-xSrxCuO4 cannot be assigned to the van Hove singularity alone. We therefore propose quantum criticality induced by a collapsing pseudogap phase as a plausible explanation for observed enhancement of electronic specific heat.

Place, publisher, year, edition, pages
American Physical Society, 2018
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-234610 (URN)10.1103/PhysRevLett.121.077004 (DOI)000442083800018 ()30169083 (PubMedID)2-s2.0-85051802488 (Scopus ID)
Note

QC 20180914

Available from: 2018-09-14 Created: 2018-09-14 Last updated: 2018-09-14Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8879-7875

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