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Leijonmarck, Simon
Publications (4 of 4) Show all publications
Nowak, A., Hagberg, J., Leijonmarck, S., Schweinebarth, H., Baker, D., Uhlin, A., . . . Lindbergh, G. (2018). Lignin-based carbon fibers for renewable and multifunctional lithium-ion battery electrodes. Holzforschung, 72(2), 81-90
Open this publication in new window or tab >>Lignin-based carbon fibers for renewable and multifunctional lithium-ion battery electrodes
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2018 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 72, no 2, p. 81-90Article in journal (Refereed) Published
Abstract [en]

Lignin-based carbon fibers (LCFs) from the renewable resource softwood kraft lignin were synthesized via oxidative thermostabilization of pure melt-spun lignin and carbonization at different temperatures from 1000 degrees C to 1700 degrees C. The resulting LCFs were characterized by tensile testing, scanning electron microscopy (SEM), X-ray diffraction (XRD) and confocal Raman spectroscopy. The microstructure is mainly amorphous carbon with some nanocrystalline domains. The strength and stiffness are inversely proportional to the carbonization temperature, while the LCFs carbonized at 1000 degrees C exhibit a strength of 628 MPa and a stiffness of 37 GPa. Furthermore, the application potential of LCFs was evaluated as negative electrodes in a lithium-ion battery (LIB) by electrochemical cycling at different current rates in a half-cell setup. The capacity drops with the carbonization temperature and the LCFs carbonized at 1000 degrees C have a capacity of 335 mAh g(-1). All LCFs showed good cycling stability. Because of the mechanical integrity and conductivity of the LCFs, there is no need to apply current collectors, conductive additives or binders. The advantage is an increased gravimetric energy density compared to graphite, which is the most common negative electrode material. LCFs show a promising multifunctional behavior, including good mechanical integrity, conductivity and an ability to intercalate lithium for LIBs.

Place, publisher, year, edition, pages
Walter de Gruyter, 2018
Keywords
lignin-based carbon fibers, lithium-ion battery, melt-spinning, multifunctional, softwood kraft lignin
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-222403 (URN)10.1515/hf-2017-0044 (DOI)000423540500001 ()2-s2.0-85041645591 (Scopus ID)
Note

QC 20180219

Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-05-24Bibliographically approved
Lu, H., Behm, M., Leijonmarck, S., Lindbergh, G. & Cornell, A. M. (2016). Flexible Paper Electrodes for Li-Ion Batteries Using Low Amount of TEMPO-Oxidized Cellulose Nanofibrils as Binder. ACS Applied Materials and Interfaces, 8(28), 18097-18106
Open this publication in new window or tab >>Flexible Paper Electrodes for Li-Ion Batteries Using Low Amount of TEMPO-Oxidized Cellulose Nanofibrils as Binder
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2016 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, no 28, p. 18097-18106Article in journal (Refereed) Published
Abstract [en]

Flexible Li-ion batteries attract increasing interest for applications in bendable and wearable electronic devices. TEMPO-oxidized cellulose nanofibrils (TOCNF), a renewable material, is a promising candidate as binder for flexible Li-ion batteries with good mechanical properties. Paper batteries can be produced using a water-based paper making process, avoiding the use of toxic solvents. In this work, finely dispersed TOCNF was used and showed good binding properties at concentrations as low as 4 wt %. The TOCNF was characterized using atomic force microscopy and found to be well dispersed with fibrils of average widths of about 2.7 nm and lengths of approximately 0.1-1 mu m. Traces of moisture, trapped in the hygroscopic cellulose, is a concern when the material is used in Li-ion batteries. The low amount of binder reduces possible moisture and also increases the capacity of the electrodes, based on total weight. Effects of moisture on electrochemical battery performance were studied on electrodes dried at 110 degrees C in a vacuum for varying periods. It was found that increased drying time slightly increased the specific capacities of the LiFePO4 electrodes, whereas the capacities of the graphite electrodes decreased. The Coulombic efficiencies of the electrodes were not much affected by the varying drying times. Drying the electrodes for 1 h was enough to achieve good electrochemical performance. Addition of vinylene carbonate to the electrolyte had a positive effect on cycling for both graphite and LiFePO4. A failure mechanism observed at high TOCNF concentrations is the formation of compact films in the electrodes.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2016
Keywords
TEMPO-oxidized cellulose nanofibrils, binder, flexible paper electrodes, moisture, Li-ion batteries
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-196456 (URN)10.1021/acsami.6b05016 (DOI)000380298400038 ()27362635 (PubMedID)2-s2.0-84979598428 (Scopus ID)
Note

QC 20161129

Available from: 2016-11-29 Created: 2016-11-14 Last updated: 2017-11-29Bibliographically approved
Leijonmarck, S., Pupurs, A. & Asp, L. (2015). Strength of thin solid polymer electrolyte coatings and the coated carbon fibres. In: ICCM International Conferences on Composite Materials: . Paper presented at 20th International Conference on Composite Materials, ICCM 2015, 19 July 2015 through 24 July 2015. International Committee on Composite Materials
Open this publication in new window or tab >>Strength of thin solid polymer electrolyte coatings and the coated carbon fibres
2015 (English)In: ICCM International Conferences on Composite Materials, International Committee on Composite Materials , 2015Conference paper, Published paper (Refereed)
Abstract [en]

As a route to increase the efficiency of electric vehicles, weight reductions through composite building materials are constantly being introduced. To further aid this effort focus has been put on structural batteries, where the composite is multifunctional serving both as energy storing as well as load bearing unit. In an attempt to reduce the high ionic resistances solid polymer electrolytes introduces, carbon fibres have been individually coated with polymeric layers ranging from <500 nm to >3 µm in thickness. This study investigates the feasibility of using such coatings in structural applications with respect to mechanical load cycling. The coated fibres were subjected to cyclic load up to approximately 1 % strain for up to 70,000 cycles. The polymer coatings were found not to be visibly affected by the prolonged mechanical fatigue. No cracks were observed in the coatings which makes the coating technique promising for future structural battery applications. © 2015 International Committee on Composite Materials. All rights reserved.

Place, publisher, year, edition, pages
International Committee on Composite Materials, 2015
Keywords
Carbon fibre, Electrocoating, Fatigue, Mechanical properties, Structural battery
National Category
Composite Science and Engineering
Identifiers
urn:nbn:se:kth:diva-236907 (URN)2-s2.0-85053137329 (Scopus ID)
Conference
20th International Conference on Composite Materials, ICCM 2015, 19 July 2015 through 24 July 2015
Funder
Swedish Energy Agency, 37712-1
Note

QC 20181211

Available from: 2018-12-11 Created: 2018-12-11 Last updated: 2018-12-11Bibliographically approved
Leijonmarck, S., Carlson, T., Hellqvist Kjell, M., Asp, L. E., Lindbergh, G., Maples, H. & Bismarck, A. (2013). Coated carbon fibre battery half-cells for structural battery composites. In: ICCM International Conferences on Composite Materials: . Paper presented at 19th International Conference on Composite Materials, ICCM 2013, 28 July 2013 through 2 August 2013 (pp. 5342-5343). International Committee on Composite Materials
Open this publication in new window or tab >>Coated carbon fibre battery half-cells for structural battery composites
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2013 (English)In: ICCM International Conferences on Composite Materials, International Committee on Composite Materials , 2013, p. 5342-5343Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
International Committee on Composite Materials, 2013
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-236930 (URN)2-s2.0-85053155653 (Scopus ID)
Conference
19th International Conference on Composite Materials, ICCM 2013, 28 July 2013 through 2 August 2013
Note

QC 20181205

Available from: 2018-12-05 Created: 2018-12-05 Last updated: 2018-12-05Bibliographically approved
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