Browsing NTNU Open by Author "Wagner, Nils Peter"
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Aqueous Processing of LiNi0.8Mn0.1Co0.1O2 and LiNi0.8Mn0.1Co0.1O2 - LiFePO4 Core - Shell Cathodes
Aasen, Vegard Bakkene (Master thesis, 2024)Ni-rike lagdelte oksider slik som LiNi0.8Mn0.1Co0.1O2 (NMC811) har vist seg å ha høy kapasitet og inneholder i tillegg lite Co sammenlignet med andre batteri-kjemier. Dette har ført til stor interesse for å ta de i bruk ... -
Are MXenes Suitable as Cathode Material for Rechargeable Mg Batteries?
Kaland, Henning; Hadler-Jacobsen, Jacob; Fagerli, Frode Håskjold; Wagner, Nils Peter; Wang, Zhaohui; Selbach, Sverre Magnus; Vullum-Bruer, Fride; Wiik, Kjell; Schnell, Sondre Kvalvåg (Peer reviewed; Journal article, 2020)MXenes, a type of two-dimensional transition metal carbide/nitride, have received significant attention for electrochemical storage applications. With substantial capacities predicted for Mg ions, MXenes have been considered ... -
Bulk substitution of F-terminations from Ti3C2Tx MXene by cation pillaring and gas hydrolysation
Fagerli, Frode Håskjold; Vullum, Per Erik; Grande, Tor; Wang, Zhaohui; Selbach, Sverre Magnus; Wiik, Kjell; Wagner, Nils Peter (Journal article, 2023)Applications of 2D MXenes are limited by the difficulty of controlling bulk termination groups after the initial HF etching step without forming surface oxides. Here, we report on gas hydrolysation using a continuous flow ... -
Comparative Study of High Voltage Spinel∥Lithium Titanate Lithium-ion Batteries in Ethylene Carbonate Free Electrolytes
Stokes-Rodriguez, Killian; Jayasayee, Kaushik; Hanetho, Sidsel Meli; Kvello, Jannicke Hatlø; Molesworth, Peter Patrick; Dahl, Øystein; Wagner, Nils Peter (Journal article; Peer reviewed, 2024)A persistent obstacle towards the realization of high voltage cathodes is electrolyte instability where oxidation and transition metal dissolution manifest in rapid capacity failure with both issues connected to the presence ... -
Difference in First Cycle Irreversible Loss between Li-ion batteries with Graphite as Anode and Na-ion Batteries with Hard Carbon as Anode
Walla, Viljar (Bachelor thesis, 2023)Hensikten med denne artikkelen er å gjennomgå effekten av første syklus irreversibelt tap av kapasitet i litium-ion batterier (LIBs) som inneholder en grafittanode og natrium-ion batterier (SIBs) som inneholder en anode ... -
Dipentamethylene thiuram tetrasulfide-based cathodes for rechargeable magnesium batteries
Kaland, Henning; Hadler-Jacobsen, Jacob; Fagerli, Frode Håskjold; Wagner, Nils Peter; Schnell, Sondre Kvalvåg; Wiik, Kjell (Peer reviewed; Journal article, 2020)Rechargeable Mg batteries (RMBs) represent a possible route for low-cost energy storage applications, but they are lacking a satisfactory cathode material. Conventional sulfur (S8) cathodes have shown promise, yet they ... -
Effect of carbon content and annealing atmosphere on phase purity and morphology of Li2MnSiO4 synthesized by a PVA assisted sol–gel method
Wagner, Nils Peter; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2015)Lithium transition metal orthosilicates of the general formula Li2MSiO4 have gained great interest as potential positive electrode material for Li-ion batteries. This study reports the dependence of phase purity and ... -
Enabling the use of lithium bis(trifluoromethanesulfonyl)imide as electrolyte salt for Li-ion batteries based on silicon anodes and Li(Ni0.4Co0.4Mn0.2)O2 cathodes by salt additives
Asheim, Karina; Holsen, I.F.; Renmann, V.; Blanco, Maria Valeria; Vullum, Per Erik; Wagner, Nils Peter; Mæhlen, Jan Petter; Svensson, Ann Mari (Journal article; Peer reviewed, 2024)Lithium bis(trifluoromethanesulfonyl)imide (LiFSI) is a promising alternative salt for Li-ion batteries. Unlike the conventional LiPF6, it is not prone to HF formation, and thus resistant to moisture. However, for cell ... -
Exploring Silica from Diatom Frustules as a High Performance, Low Cost and Environmentally Friendly Anode Material for Lithium Ion Batteries
Norberg, Andreas Nicolai (Master thesis, 2017)In this work, silica extracted from diatom frustules was explored as a potential high performance, low cost and environmentally friendly anode material for lithium ion batteries. The diatom frustules were washed and calcined, ... -
Fe and V substituted Li2MnSiO4/C As Potential Cathode Material for Li-Ion Batteries
Wagner, Nils Peter; Dalod, Antoine Robert Marie; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2015)Lithium transition-metal silicate materials are promising candidates for next generation Li-ion batteries since they allow Li extraction/insertion beyond one Li ion per formula unit. They consist of cheap, non-toxic and ... -
Flame-made Lithium Transition Metal Orthosilicates
Wagner, Nils Peter; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2016)Li2MSiO4 (M = Fe, Mn, Co) compounds have since their discovery gained increased attention as alternative, inexpensive and inherently safe positive electrodes for Li-ion batteries. To meet the required performance for an ... -
Fordeler og ulemper med litium-svovel batterier for en bærekraftig framtid
Høiem, Sander (Bachelor thesis, 2023)Litium-svovel batterier er et type batteri som har vekket stor interesse på grunn av dens høye spesifikke kapasitet. Det er derimot en del utfordringer assosiert med teknologien som en shuttle effekt, dendrittdannelse, ... -
Improved cyclability of Nickel-rich layered oxides
Wagner, Nils Peter; Tolchard, Julian R; Tron, Artur; Pollen, Harald Norrud; Gaertner, Heiko; Vullum, Per Erik (Peer reviewed; Journal article, 2020)This study compares the physico- and electro- chemical properties of LiNi0.8Mn0.10Co0.1O2 (NMC811) and LiNi0.83Mn0.06Co0.09Al0.1O2 (NMCA) prepared by an oxalic acid co-precipitation. Deposition of a SiO2 surface coating ... -
Improved electrochemical performance and solid electrolyte interphase properties of electrolytes based on lithium bis(fluorosulfonyl)imide for high content silicon anodes
Asheim, Karina; Vullum, Per Erik; Wagner, Nils Peter; Andersen, Hanne Flåten; Mæhlen, Jan Petter; Svensson, Ann Mari (Journal article; Peer reviewed, 2022)Electrodes containing 60 wt% micron-sized silicon were investigated with electrolytes containing carbonate solvents and either LiPF6 or lithium bis(fluorosulfonyl)imide (LiFSI) salt. The electrodes showed improved performance, ... -
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 ... -
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 ... -
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 ... -
New insights into orthophosphoric acid assisted rapid aqueous processing of NMC622 cathodes
Tolchard, Julian R; Vullum, Per Erik; Arstad, Bjørnar; Wagner, Nils Peter (Peer reviewed; Journal article, 2023)The use of orthophosphoric acid to stabilize aqueous processing of high nickel NMC622 electrodes was assessed under rapid processing conditions, in which the active material powder was in suspension for less than 1 hour. ... -
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 ...