| 1. |
- Edstrom, K., et al.
(författare)
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The NordBatt Conferences: The Journey so Far and the Future Ahead
- 2023
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Ingår i: Batteries and Supercaps. - 2566-6223. ; 6:11
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- All great things have humble beginnings. In 2013 when NordBatt started, we had no lithium-ion battery manufacturing in the Nordic countries and we had rather few EVs on the roads, although things were clearly starting to move – Tesla Model S in fact topped the monthly new car sales of Norway in September that very year. Yet, even if the field was advancing and lively, relatively few Nordic research groups were doing any kind of battery R&D. Now, in 2023, almost everything is different; batteries and “electrify everything” are seen, not only by us, as the next industrial revolution – it is a topic gathering considerably many more actors in academia as well as in the whole ecosystem of batteries.
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| 2. |
- Kumar, Tanuj, et al.
(författare)
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Photo-generated Charge Trapping in Phase Segregated Halide Perovskites : A Comprehensive Approach towards Efficient Photo-Rechargeable Ion Capacitors
- 2023
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Ingår i: Batteries & Supercaps. - : Wiley-VCH Verlagsgesellschaft. - 2566-6223. ; 6:10
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Tidskriftsartikel (refereegranskat)abstract
- The right balance between photo-absorption and electronic-ionic conductivity is needed for photo-rechargeable bifunctional devices for off-grid energy applications. Recently halide perovskites have been utilized for photo-rechargeable supercapacitors, but the mechanism of photo-capacitance enhancement is not known. Herein, we have fabricated mixed halide perovskites-based photo-rechargeable supercapacitors in two ways and examined the energy harvesting and storage capabilities of these devices. The porous electrode prepared from the mixed halide perovskites (CH3NH3PbBr2I) shows photo-capacitance enhancement up to 15 F/g, while the electrode prepared from the blend of CH3NH3PbBr3 and CH3NH3PbI3 (2 : 1 by molar ratio) shows the photo-capacitance diminution up to 12 F/g. Despite higher specific capacitance (~38 F/g in dark) in blend perovskites due to increased ion diffusion, the photo-generated charge trapping at nanoscale phase segregation is responsible for the diminution in photo-capacitance of these bifunctional devices, while a uniform mixing of halide ions in mixed halide perovskites nanocrystals leads to increased photo-capacitance.
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| 3. |
- Martin, Pierre-Alexandre, 1991, et al.
(författare)
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(Localized) Highly Concentrated Electrolytes for Calcium Batteries
- 2023
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Ingår i: Batteries and Supercaps. - : Wiley. - 2566-6223. ; 6:5
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Tidskriftsartikel (refereegranskat)abstract
- The concept of non-aqueous highly concentrated electrolytes (HCEs) for modern rechargeable batteries has recently evolved further by also adding a non-coordinating solvent, i. e., a diluent, to create localized HCEs (LHCEs). LHCEs rely on a charge carrier design similar to that of HCEs in synergy with tailored macroscopic properties, especially reduced viscosity. LHCEs have now been extensively investigated for monovalent Li+ and Na+ based batteries, but here we investigate both HCEs and LHCEs for divalent Ca2+ conducting systems. Here we systematically map both molecular and macroscopic features as function of composition of Ca(TFSI)2 (calcium bis(trifluoromethane)sulfonimide) in PC (propylene carbonate) based HCEs as well as the corresponding LHCEs created using TTE (1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether) as diluent. Some unique HCE properties arise already at ca. 2.00 m, which is at a lower salt concentration than for monovalent systems, and in addition the local structure of the HCE can be maintained even within a nominal 0.45 m LHCE (starting from a 3.26 m parent HCE). The combined observations made at molecular and macro levels pave the way for further optimization of important physico-chemical properties, proper design of electrochemical investigations, and eventually a better understanding of how to best improve the desolvation kinetics at e. g., the electrolyte/electrode interfaces of a Ca metal anode.
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| 4. |
- Mishukova, Viktoriia, et al.
(författare)
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Microsupercapacitors Working at 250 °C
- 2023
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Ingår i: Batteries & Supercaps. - : Wiley-VCH Verlagsgesellschaft. - 2566-6223.
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Tidskriftsartikel (refereegranskat)abstract
- The raised demand for portable electronics in high-temperature environments (>150 °C) stimulates the search for solutions to release the temperature constraints of power supply. All-solid-state microsupercapacitors (MSCs) are envisioned as promising on-chip power supply components, but at present, nearly none of them can work at temperature over 200 °C, mainly restricted by the electrolytes which possess either low thermal stability or incompatible fabrication process with on-chip integration. In this work, we have developed a novel process to fabricate highly thermally stable ionic liquid/ceramic composite electrolytes for on-chip integrated MSCs. Remarkably, the electrolytes enable MSCs with graphene-based electrodes to operate at temperatures as high as 250 °C with a high areal capacitance (~72 mF cm−2 at 5 mV s−1) and good cycling stability (70 % capacitance retention after 1000 cycles at 1.4 mA cm−2).
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| 5. |
- Salian, Girish D., et al.
(författare)
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Understanding the electrochemical and interfacial behaviour of sulfolane-based electrolytes in LiNi0.5Mn1.5O4-graphite full-cells
- 2023
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Ingår i: Batteries & Supercaps. - : John Wiley & Sons. - 2566-6223. ; n/a:n/a
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Tidskriftsartikel (refereegranskat)abstract
- An ethylene carbonate-free electrolyte composed of 1 M lithium bis(fluorosulfonyl) imide (LiFSI) in sulfolane (SL) is studied here for LiNi0.5Mn1.5O4-graphite full-cells. An important focus on the evaluation of the anodic stability of the SL electrolyte and the passivation layers formed on LNMO and graphite is being analysed along with intermittent current interruption (ICI) technique to observe the resistance while cycling. The results show that the sulfolane electrolyte shows more degradation at higher potentials unlike previous reports which suggested higher oxidative stability. However, the passivation layers formed due to this electrolyte degradation prevents further degradation. The resistance measurements show that major resistance arises from the cathode. The pressure evolution during the formation cycles suggests that there is lower gas evolution with sulfolane electrolyte than in the conventional electrolyte. The study opens a new outlook on the sulfolane based electrolyte especially regarding its oxidative/anodic stability.
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| 6. |
- Slim, Zaher, 1992, et al.
(författare)
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Hydride-Enhanced Plating and Stripping of Aluminum from Triflate-based Organic Electrolytes**
- 2023
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Ingår i: Batteries and Supercaps. - 2566-6223. ; 6:9
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Tidskriftsartikel (refereegranskat)abstract
- In the quest for developing rechargeable aluminum (Al) batteries, reversible Al plating in the absence of active-halide components is considered an immense challenge. For this reason, the choice of electrolyte has been primarily limited to the highly corrosive chloroaluminate systems based on aluminum trichloride (AlCl3). In this work, we demonstrate reversible room-temperature Al plating from an active-halide-free (AHF) organic electrolyte based on aluminum trifluoromethanesulfonate (Al(OTF)3) and lithium aluminum hydride (LiAlH4) in tetrahydrofuran (THF), as well as its AlCl3 counterpart. From insights obtained by Density Functional Theory (DFT) and Fourier-Transform Infrared (FTIR) spectroscopy, ionic speciation in the electrolyte is explored, and mechanisms for the underlying electrochemical processes in the trifluoromethanesulfonate (OTF−)-based electrolytes are proposed. Al plating and stripping were confirmed by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Characterizing the Al deposits from either the OTF−- or the chloride (Cl−)-based electrolytes via depth-profile X-ray Photoelectron Spectroscopy (XPS) analyses, we find that these deposits consist of metallic Al, aluminum oxide (Al2O3), and either aluminum trifluoride (AlF3) or aluminum chloride (AlxCly) contaminants arising from a reaction with the electrolyte components which occurs during the plating process.
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| 7. |
- Wu, Quan, et al.
(författare)
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Electro-Chemo-Mechanical Failure Mechanisms of Solid-State Electrolytes
- 2023
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Ingår i: Batteries and Supercaps. - 2566-6223. ; 6:11
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Forskningsöversikt (refereegranskat)abstract
- Solid-state lithium-metal batteries (SSLMBs) are considered as the next-generation energy storage systems due to their high theoretical energy density and safety. However, the practical deployment of SSLMBs has been impeded by the failure of solid-state electrolytes (SSEs) which is indicated by the increased impedance, elevated polarization, and capacity degradation. The failure is commonly a result of lithium (Li) dendrite growth and propagation, inactive Li generation, unstable interface formation, void and pore formation, and crack infiltration. The failure processes can be divided into electric failure, (electro)chemical failure, and mechanical failure based on the different mechanisms. The systematical understanding of SSEs failure is crucial for the development of SSEs. Therefore, this review comprehensively summarizes the details of the three SSEs failure to provide new insights for future studies, shedding light on the design of SSLMBs with high energy density, safety, and cycling stability. Failure mechanisms: This review provides a comprehensive summary of the coupled electro-chemo-mechanical failure mechanisms of solid-state electrolytes. The electric failure results from the short circuits caused by growth and propagation of Li dendrites and the capacity loss because of inactive Li formation. The formation of kinetics/thermal unstable interphase accounts for the (electro)chemical failure. Cracks infiltration and voids/pores formation lead to mechanical failure.
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| 8. |
- Xie, Tian, et al.
(författare)
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Rational Regulation of Cu-Co Thiospinel Hierarchical Microsphere to Enhance the Supercapacitive Properties
- 2023
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Ingår i: Batteries & Supercaps. - : Wiley-VCH Verlagsgesellschaft. - 2566-6223. ; 6:12
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Tidskriftsartikel (refereegranskat)abstract
- Micro-structure of the electrodes play significant role in regulating the supercapacitive properties. Herein, three-dimensional hierarchical heterostructures (3DHHs) CuCo2S4 microspheres with regulated micro-structure is constructed via a simple one-step method. The 3DHHs CuCo2S4 microspheres experience two-dimensional (2D) lamellar interpenetration structure→two-dimensional (2D) lamellar interpenetration structure with nanoparticles embedded on the 2D lamellar→nanoparticles assembled lamellar interpenetration structure by simply tuning the reaction time. Typically, the transition state exhibits much higher specific surface area, which is conducive to electrochemical reaction by providing adequate electrochemical interfaces. As supercapacitor electrode, the 3DHHs CuCo2S4-10 exhibits an excellent capacitance of 1060 F g−1 at 1 A g−1, and even superior capacity retention of 86.7 % at 5 A g−1 after 13000 cycles. Noteworthy, asymmetric supercapacitor assembles by 3DHHs CuCo2S4-10 and active carbon can achieve high energy density of 56.3 Wh kg−1 at 750 W kg−1, which holds more than 150 % capacitance retention over 5000 cycles. This work provides simply micro-structure regulation in materials synthesis, which has significant potential in renewable energy applications.
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| 9. |
- Yang, Li, et al.
(författare)
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A Highly Reversible Aqueous Ammonium-Ion Battery based on alpha-MoO3/Ti3C2Tz Anodes and (NH4)(x)MnO2/CNTs Cathodes
- 2023
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Ingår i: Batteries & Supercaps. - : WILEY-V C H VERLAG GMBH. - 2566-6223. ; 6
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Tidskriftsartikel (refereegranskat)abstract
- Aqueous ammonium-ion batteries (AAIBs) are appealing due to their relatively low cost and good rate performance. In general, AAIBs are environmentally friendlier than their non-aqueous counterparts. However, it is still a challenge to achieve highly reversible AAIBs with decent voltages and energy/power densities. Herein, we report on a full-cell configuration using alpha-MoO3/Ti3C2Tz films as anodes, and (NH4)(x)MnO2/CNTs films as cathodes in a 1 M ammonium acetate (NH4Ac) electrolyte. At 2 V, the operating cell voltage, OCV, is one of the highest reported for AAIBs. A maximum energy density of similar to 32 Wh kg(-1) (similar to 54 Wh L-1) at 0.2 A g(-1) and a maximum power density of similar to 10 kW kg(-1) (similar to 17 kW L-1) at 10 A g(-1) are attained. When the full cells are cycled 2,000 times at 1 A g(-1) they retain similar to 73 % of their initial capacity. When cycling at 10 A g(-1), similar to 96 % of capacity is retained after 43,500 cycles. After 10 h, self-discharge reduces the OCV to similar to 72 % of its original value. This work provides a roadmap for developing high performance AAIBs with high voltages and high energy/power densities. Before this is possible it is imperative that the self-discharge rate be substantially reduced.
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| 10. |
- Østli, Elise R. R., et al.
(författare)
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Stabilizing the Cathode Interphase of LNMO using an Ionic-liquid based Electrolyte
- 2023
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Ingår i: Batteries & Supercaps. - : John Wiley & Sons. - 2566-6223. ; 6:7
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Tidskriftsartikel (refereegranskat)abstract
- The ionic liquid (IL)-based electrolyte comprising 1.2 M lithium bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (PYR13FSI) (ILE) has been evaluated as a suitable system for the high-voltage cathode material LiNi0.5-xMn1.5+xO4 (LNMO) when cycled vs. graphite anodes. The oxidative stability of the ILE was evaluated by linear sweep voltammetry (LSV) and synthetic charge-discharge profile voltammetry (SCPV) and was found to exceed that of state-of-the-art 1 M LiPF6 in 1 : 1 ethylene carbonate (EC) : diethylcarbonate (DEC) (LP40). Improved cycling performance both at 20 degrees C and 45 degrees C was found for LNMO||graphite full cells with the IL electrolyte. X-ray photoelectron spectroscopy (XPS) analysis showed that robust and predominantly inorganic surface layers were formed on the LNMO cathode using the ILE, which stabilized the electrode. Although the high viscosity of the ILE limits the rate performance at 20 degrees C, this ILE is a promising alternative electrolyte for use in lithium-ion batteries (LiBs) with high-voltage cathodes such as LNMO, especially for use at elevated temperatures.
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