| 1. |
- Biradar, Madan R., et al.
(författare)
-
A redox acceptor-acceptor nitro functionalized naphthalene diimide/rGO anode for sustainable lithium-ion batteries
- 2024
-
Ingår i: Energy Advances. - 2753-1457. ; 45
-
Tidskriftsartikel (refereegranskat)abstract
- Organic materials capable of undergoing oxidation and reduction reactions are attracting attention as potential electrode components, providing a more environmentally sustainable alternative for lithium-ion batteries (LIBs). Despite notable achievements at the laboratory level, these materials still face challenges, such as high solubility in electrolyte solutions and limited thermal stability, leading to capacity degradation. While carbon remains the benchmark for anode materials, issues like irreversible capacity loss and low specific capacity impede the development of advanced LIBs. This study presents a composite material incorporating naphthalene diimide nitro derivatives (NDI-2NO2 and NDI-4NO2) into reduced graphene oxide (rGO) as an anode material for LIBs. The inclusion of rGO not only addresses the problem of material dissolution in the organic electrolyte, but also significantly improves the rate performance and conductivity of the resulting composite materials. Specifically, at a current density of 50 mA g-1, the NDI-4NO2/rGO composite demonstrates a remarkably high specific capacity of 699 mA h g-1, while the NDI-2NO2/rGO composite yields a specific capacity of approximately 560 mA h g-1. Finally, we showcase that optimal performance as superior anode materials can be achieved by effectively combining organic compounds capable of participating in oxidation and reduction reactions with graphene-based composites. This work demonstrates the development of organic material and reduced graphene oxide composites for environment-friendly, stable, and recyclable lithium-ion batteries.
|
|
| 2. |
- Cheng, Haoliang, et al.
(författare)
-
Assessing the effect of surface states of mesoporous NiO films on charge transport and unveiling an unexpected light response phenomenon in tandem dye-sensitized solar cells
- 2022
-
Ingår i: Energy Advances. - : Royal Society of Chemistry. - 2753-1457. ; 1:5, s. 303-311
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, the role of NiO surface states is assessed in a tandem dye-sensitized solar cell (t-DSSC) consisting of a 4-(Bis-{4-[5-(2,2-dicyano-vinyl)-thiophene-2-yl]-phenyl}-amino)-benzoic acid (P1) dye-sensitized NiO photocathode, a VG1-C8 dye-sensitized TiO2 photoanode and the I−/I3− redox couple. The NiO surface states are proved to participate in the reduction of the I−/I3− electrolyte in the t-DSSCs. By adjusting the thickness of the TiO2 film, the charge transport processes of the t-DSSCs are significantly affected by the photocurrent and the NiO surface states, resulting in various photovoltaic properties. This work also proves that the NiO surface states together with energy transfer between the desorbed P1 dye from the NiO photocathode and the VG1-C8 dye from the TiO2 photoanode are responsible for the light response from both dyes observed in the IPCE spectra of the t-DSSCs.
|
|
| 3. |
- Colbin, Lars Olow Simon, et al.
(författare)
-
Anodic dissolution of aluminum in non-aqueous electrolyte solutions for sodium-ion batteries
- 2023
-
Ingår i: Energy Advances. - : Royal Society of Chemistry. - 2753-1457. ; 3:1, s. 143-
-
Tidskriftsartikel (refereegranskat)abstract
- Anodic dissolution of aluminum (commonly called aluminum corrosion) is a potential issue in sodium-ion batteries. Herein, it is demonstrated how different sodium-ion battery electrolyte solutions affect this phenomenon. The type of electrolyte was critical for the presence of anodic dissolution, while the solvent appeared to alter the dissolution process.
|
|
| 4. |
- Gamache, Mira T., et al.
(författare)
-
E. coli-based semi-artificial photosynthesis : biocompatibility of redox mediators and electron donors in [FeFe] hydrogenase driven hydrogen evolution
- 2023
-
Ingår i: Energy Advances. - : Royal Society of Chemistry. - 2753-1457. ; 2:12, s. 2085-2092
-
Tidskriftsartikel (refereegranskat)abstract
- Semi-artificial photosynthesis aims to harness the power of biocatalysis while breaking away from the limitations of Nature's photosynthetic machinery, by merging artificial light harvesters with enzyme catalysts. However, the artificial photocatalytic components are generally toxic towards the biological components. In this study, we investigate a system wherein Escherichia coli cells, heterologously expressing an [FeFe] hydrogenase, act as hydrogen evolution catalyst in combination with an artificial photosensitizer, sacrificial electron donor, and redox mediator. Previously, the use of artificial components or their reaction products was found to be toxic to E. coli cells. To overcome this challenge, we examined alternative electron donors and redox mediators, achieving turnover numbers (TON, 39.6 mu mol H-2 per 1 mL sample with OD600 = 5) and turnover frequencies (TOF, 812 nmol H-2 h(-1) per 1 mL sample with OD600 = 5) on par with previously reported high performing E. coli-based systems while greatly reducing cytotoxic effects. Transient absorption spectroscopy revealed how the choice of photosensitizer, electron donor, and redox mediator affects the observed photocatalytic TOFs. Following optimization of the redox mediator and electron donor the biocatalyst demonstrated remarkable stability throughout the experiments. We identified the availability of electrons from the electron donor as the primary limiting factor, with approximately 85% of electrons being effectively utilized for hydrogen production. Furthermore, the observed activity with different [FeFe] hydrogenases verified the broad applicability of the identified photocatalytic components to promote light-driven catalysis in bio-hybrid systems.
|
|
| 5. |
- Lindahl, Niklas, 1981, et al.
(författare)
-
Early stage techno-economic and environmental analysis of aluminium batteries
- 2023
-
Ingår i: Energy Advances. - : Royal Society of Chemistry (RSC). - 2753-1457. ; 2:3, s. 420-429
-
Tidskriftsartikel (refereegranskat)abstract
- For any proper evaluation of next generation energy storage systems technological, economic, and environmental performance metrics should be considered. Here conceptual cells and systems are designed for different aluminium battery (AlB) concepts, including both active and passive materials. Despite the fact that all AlBs use high-capacity metal anodes and materials with low cost and environmental impact, their energy densities differ vastly and only a few concepts become competitive taking all aspects into account. Notably, AlBs with high-performance inorganic cathodes have the potential to exhibit superior technological and environmental performance, should they be more reversible and energy efficient, while at the system level costs become comparable or slightly higher than for both AlBs with organic cathodes and lithium-ion batteries (LIBs). Overall, with continued development, AlBs should be able to complement LIBs, especially in light of their significantly lower demand for scarce materials. Several aluminium battery concepts are evaluated at material, cell and system levels for technical, economic and environmental performance, which enables them to complement lithium-ion batteries in the future.
|
|
| 6. |
- Massel, Felix, 1986-, et al.
(författare)
-
The role of anionic processes in Li1−xNi0.44Mn1.56O4 studied by resonant inelastic X-ray scattering
- 2023
-
Ingår i: Energy Advances. - : RSC Publishing. - 2753-1457. ; 2:3, s. 375-384
-
Tidskriftsartikel (refereegranskat)abstract
- We investigated the first lithiation cycle of the positive electrode material Li1−xNi0.44Mn1.56O4 (LNMO) using soft X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS) at the transition metal L- and oxygen K-edges. Our XAS results show that charge compensation in LNMO takes place mostly within the Ni–O bonds, which is consistent with previous similar studies. O K- and Ni L-RIXS reveals how the holes that are created by removal of electrons during delithiation are distributed between the Ni- and O-ions. Non-trivial anionic activity is revealed by O K-RIXS features such as the appearance of low-energy intra-band excitations and re-hybridization with Ni 3d-states forming a new intense band close to the top of the oxygen valence band. At the same time, Ni L-RIXS compares more favorably with covalently than with ionically bonded Ni-oxide based compounds. Thus, a picture emerges where delithiation leads to a gradual transition of the ground state of LNMO from Ni 3d8 to one with non-negligible amounts of ligand holes, i.e. Ni 3d8−x 2−x (0 < x < 2, where stands for a ligand hole) instead of a highly ionic state e.g. Ni 3d6. Our observations highlight the importance of studying the anionic character of redox processes in lithium ion batteries.
|
|
| 7. |
- Subramaniyam, Chandrasekar M., et al.
(författare)
-
Additive-free red phosphorus/Ti3C2TxMXene nanocomposite anodes for metal-ion batteries
- 2022
-
Ingår i: Energy Advances. - : Royal Society of Chemistry (RSC). - 2753-1457. ; :12, s. 999-1008
-
Tidskriftsartikel (refereegranskat)abstract
- Herein, we report on scalable, environmentally benign, and additive-free, high-performance anodes for alkali-metal-ion batteries (MIBs, where M = Li+, Na+, K+). The intercalators in these anodes are the red phosphorus (RP) nanoparticles of uniform size (~40 nm), which are dispersible and blend with water-dispersed Ti3C2Tx MXene, forming a highly viscous aqueous slurry to fabricate additive-free nanocomposite electrodes. We further enhanced their performance using a very low weight percentage of various carbonaceous nanomaterials. Our RP-MWCNT/MXene nanocomposite anodes exhibited enhanced ion transport and low charge transfer resistance, delivering specific capacities of 1293.7 mA h g-1 at 500 mA g-1 and 263.3 mA h g-1 at 2600 mA g-1 for 10 000 cycles in Li+ cells, 371.6 mA h g-1 at 500 mA g-1 in Na+ cells, and 732.8 mA h g-1 at 50 mA g-1 in K+ cells. Our work shows a path towards fabricating nanoarchitectured electrodes using sustainable materials to eliminate inert polymer binders, toxic processing solvents, and rare earth elements from the battery fabrication process for next-generation alkali-metal-ion batteries.
|
|
| 8. |
- Xu, Yanqi, et al.
(författare)
-
Fluorine-Free “Solvent-in-Salt” Sodium Battery Electrolytes: Solvation Structure and Dynamics
- 2024
-
Ingår i: Energy Advances. - : Royal Society of Chemistry. - 2753-1457. ; 3:3, s. 564-573
-
Tidskriftsartikel (refereegranskat)abstract
- The solvation structure, dynamics, and transport properties, as well as thermal and electrochemical stabilities of “solvent-in-salt” (SIS) electrolytes, also known as highly concentrated electrolytes, are far from fully understood. Furthermore, these special types of electrolytes are almost without exception based on fluorinated salts. In contrast, here we report on fluorine-free SIS electrolytes comprising ambient temperature liquid sodium bis(2-(2-ethoxyethoxy)ethyl)phosphate (NaDEEP) salt and tris(2-(2-ethoxyethoxy)ethyl)phosphate (TEOP) solvent, for which the ionic conductivities and ion diffusivities are altered profoundly as the salt concentration is increased. A careful molecular level analysis reveals a microstructure with a “solvent-rich” phase with almost an order of magnitude faster ion diffusion than in a “salt-rich” phase. Aggregated ionic structures in these SIS electrolytes lead to higher ionic conductivities alongside lower glass transition temperatures, <−80 °C, but also agreeable thermal stabilities, up to 270 °C, and improved anodic stabilities, possibly up to 7.8 V vs. Na/Na+ and at least >5 V vs. Na/Na+. Altogether, this provides a foundation for both better understanding and further development of fluorine-free SIS electrolytes for sodium batteries.
|
|
