Blar i NTNU Open på forfatter "Svensson, Ann Mari"
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In situ formation of a polypyrrole-coating on a carbon-coated LiNi0.5Mn1.5O4 cathode in Li-ion batteries as a strategy for enhanced cycling stability.
Kvalsvik, Nora (Master thesis, 2023)Li-ion batterier (LiBs) er den ledende batteriteknologien for bærbare enheter og forbrukerelektronikk i dagens marked. Konvensjonelle katodematerialer anvendt i disse batteriene inneholder ofte kobolt, som er giftig, dyrt, ... -
Inside the electrode: Looking at cycling products in Li/O2 batteries
Augustin, Matthias; Vullum, Per Erik; Vullum-Bruer, Fride; Svensson, Ann Mari (Journal article; Peer reviewed, 2019)This work investigates the impact of electrochemical reactions and products on discharge capacity and cycling stability with electrolytes based on two common solvents – tetraethylene glycol dimethyl ether (TEGDME) and ... -
Insights on microstructural evolution and capacity fade on diatom SiO <inf>2</inf> anodes for lithium-ion batteries
Hua, Weicheng; Nylund, Inger-Emma; Cova, Federico Hector; Svensson, Ann Mari; Blanco, Maria Valeria (Peer reviewed; Journal article, 2023)is a promising material for developing high-capacity anodes for lithium-ion batteries (LIBs). However, microstructural changes of anodes at the particle and electrode level upon prolonged cycling remains unclear. In this ... -
Interfacial Boundary between Carbon Anodes and Molten Salt Electrolyte
Gebarowski, Wojciech; Sommerseth, Camilla; Ratvik, Arne Petter; Sandnes, Espen; Lossius, Lorentz Petter; Linga, Hogne; Svensson, Ann Mari (Journal article, 2016)The properties of calcined petroleum cokes (CPC), used in the anodes in the Hall-Héroult process, are important for the electrochemical behaviour of the anodes. CPCs from different sources vary not only in impurity level ... -
Interphase Engineering of LiNi0.88Mn0.06Co0.06O2 Cathodes Using Octadecyl Phosphonic Acid Coupling Agents
Pollen, Harald Norrud; Nylund, Inger-Emma; Dahl, Øystein; Svensson, Ann Mari; Brandell, Daniel; Younesi, Reza; Tolchard, Julian R; Wagner, Nils Peter (Journal article; Peer reviewed, 2023)Ni-rich layered oxides are proven high-energy cathode materials for Li-ion batteries, but their characteristic short cycle life remains a challenge for implementation on a wider scale. The surface reactivity of Ni-rich ... -
Introducing Lignin as a Binder Material for the Aqueous Production of NMC Cathodes for Li-ion Batteries
Bryntesen, Silje Nornes; Tolstorebrov, Ignat; Svensson, Ann Mari; Shearing, Paul Robert; Lamb, Jacob Joseph; Burheim, Odne Stokke (Peer reviewed; Journal article, 2022)By enabling water-based cathode processing, the energy-intensive N-methyl-2-pyrrolidone (NMP) recovery step can be eliminated, reducing the cost and environmental impact of LIBs. Aqueous processing of high capacity ... -
Investigation of Routes for Improving the Rate Capability of Electrodes in Li-ion Batteries
Sætnan, Marita (Master thesis, 2014)Lithium-ion battery, first introduced to market in 1991 by Sony, is today one of the most popular battery technologies in the world. The development of Li-ion battery applications from portable electronic devices to electric ... -
Limitations of Ultrathin Al2O3 Coatings on LNMO Cathodes
Østli, Elise Ramleth; Tesfamhret, Yonas; Wenner, Sigurd; Lacey, Matthew J.; Brandell, Daniel; Svensson, Ann Mari; Selbach, Sverre Magnus; Wagner, Nils P. (Peer reviewed; Journal article, 2021)This study demonstrates the application of Al2O3 coatings for the high-voltage cathode material LiNi0.5–xMn1.5+xO4−δ (LNMO) by atomic layer deposition. The ultrathin and uniform coatings (0.6–1.7 nm) were deposited on LNMO ... -
Liquid feed flame spray pyrolysis as alternative synthesis for electrochemically active nanosized Li2MnSiO4
Wagner, Nils Peter; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2016)A novel liquid-feed flame spray pyrolysis synthesis with reducing post-heat treatment yielding highly phase pure nano-sized and carbon-coated Li2MnSiO4 is reported. In contrast to most reported Li2MnSiO4 synthesis routes, ... -
Lithium bis (fluorosulfonyl) imide as electrolyte salt for high-content silicon-based anodes for Li-ion batterier
Asheim, Karina (Doctoral theses at NTNU;2021:413, Doctoral thesis, 2021)Li-ion batteries have become the superior rechargeable battery technology due to high energy density, long cycle life, safety and cost. Several materials can be used for the electrodes and the electrolyte, enabling ... -
Lithium dendrites in solid-state batteries - Where they come from and how to mitigate them
Flatscher, Florian (Doctoral theses at NTNU;2023:382, Doctoral thesis, 2023)A major contributor to global CO2 emissions is transportation and a transition to electric vehicles could lead to a significant reduction of those emissions. A roadblock in this transition are safety issues of electric ... -
Mn3O4 and Carbon-Based Cathode Materials for Magnesium Batteries
Wang, Lu (Doctoral theses at NTNU;2017:245, Doctoral thesis, 2017) -
Modelling capacity fade in silicon-graphite composite electrodes for lithium-ion batteries
Dhillon, Shweta; Hernández, Guiomar; Wagner, Nils Peter; Svensson, Ann Mari; Brandell, Daniel (Peer reviewed; Journal article, 2021)Silicon-based composite electrodes in lithium ion batteries attract increasing attention because of their high theoretical capacity. Here, numerical simulations are used to better understand the interplay between electrochemical ... -
Nanostructured diatom earth SiO2 negative electrodes with superior electrochemical performance for lithium ion batteries
Blanco, Maria Valeria; Renman, Viktor; Vullum-Bruer, Fride; Svensson, Ann Mari (Peer reviewed; Journal article, 2020)Diatomaceous earth (DE) is a naturally occurring silica source constituted by fossilized remains of diatoms, a type of hard-shelled algae, which exhibits a complex hierarchically nanostructured porous silica network. In ... -
Novel carbon coating on aluminum current collectors for lithium-ion batteries
Onsrud, Morten; Tezel, Ahmet Oguz; Fotedar, Sameer; Svensson, Ann Mari (Peer reviewed; Journal article, 2022)In this work a significant improvement of the performance of LiFePO4 (LFP) composite cathodes, in particular at high rates (up to 12C), is demonstrated by the use of carbon-coated aluminum current collectors. The coating ... -
On the Cycling Performance and Stability of Silicon-Based Anodes in Lithium-Ion Batteries - Revealing Challenges and Failure Mechanisms Using Post Mortem Analyses
Kaland, Henning (Master thesis, 2017)Li-ion batteries with improved energy density can be obtained by increasing the Si content in the graphite electrode, or replace it entirely with a Si based electrode. This may have the additional benefit of improving ... -
On the Durability of Protective Titania Coatings on High-Voltage Spinel Cathodes
Østli, Elise Ramleth; Ebadi, Mahsa; Tesfamhret, Yonas; Mahmoodinia, Mehdi; Lacey, Matthew; Brandell, Daniel; Svensson, Ann Mari; Selbach, Sverre Magnus; Wagner, Nils Peter (Peer reviewed; Journal article, 2022)TiO2-coating of LiNi0.5-xMn1.5+xO4 (LNMO) by atomic layer deposition (ALD) has been studied as a strategy to stabilize the cathode/electrolyte interface and mitigate transition metal (TM) ion dissolution. The TiO2 coatings ... -
On the Viability of Lithium Bis(fluorosulfonyl)imide as Electrolyte Salt for Use in Lithium-Ion Capacitors
Schweigart, Philipp; Eleri, Obinna Egwu; Nylund, Inger-Emma; Lai, Samson Yuxiu; Lou, Fengliu; Svensson, Ann Mari (Peer reviewed; Journal article, 2023) -
On Vanadium Substitution in Li2MnSiO4/C as Positive Electrode for Li-ion Batteries
Wagner, Nils Peter; Vullum, Per Erik; Nord, Magnus Kristofer; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2016)Vanadium substitution is an interesting approach to manipulate the properties of the poor electronic and ionic conducting lithium transition metal orthosilicates. Especially, if incorporated on the Si site, it could alter ... -
Optical and Electrochemical Characterisation of Carbon Anodes with Varying Porosity and Coke Quality
Jahrsengene, Gøril; Farahani, Mahyar; Linga, Hogne; Svensson, Ann Mari (Peer reviewed; Journal article, 2022)The performance of carbon anodes in aluminium production will depend on both the coke quality (impurities, structure) and the physical properties of the anode (density, permeability, electric resistivity). Here, a set of ...