Browsing NTNU Open by Author "Wagner, Nils Peter"
Now showing items 1-20 of 29
-
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 ... -
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 ... -
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, ... -
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 ... -
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 ... -
Performance and failure analysis of full cell lithium ion battery with LiNi0.8Co0.15Al0.05O2 and silicon electrodes
Wagner, Nils Peter; Asheim, Karina; Vullum-Bruer, Fride; Svensson, Ann Mari (Journal article; Peer reviewed, 2019)The influence of the lithium inventory on the performance and degradation mechanism of NCA||Si cells operating at a third of the theoretical silicon capacity is analysed. The lithium inventory was increased by electrochemical ... -
Performance Study of MXene/Carbon Nanotube Composites for Current Collector- and Binder-Free Mg-S Batteries
Kaland, Henning; Fagerli, Frode Håskjold; Hadler-Jacobsen, Jacob; Zhao-Karger, Zhirong; Fichtner, Maximilian; Wiik, Kjell; Wagner, Nils Peter (Peer reviewed; Journal article, 2021)The realization of sustainable and cheap Mg-S batteries depends on significant improvements in cycling stability. Building on the immense research on cathode optimization from Li-S batteries, for the first time a beneficial ... -
Pursuing New Cathode Materials for Rechargeable Magnesium Batteries
Kaland, Henning (Doctoral theses at NTNU;2021:65, Doctoral thesis, 2021)High-performance and safe batteries based on cheap and sustainable materials are highly desirable to accelerate the transition to a renewable energy-based society. The ongoing electrification of the transport sector has ...