Li,* G.; Liu, Y.; Schultz, T.; Exner, M.; Muydinov, R.; Wang, H.; Scheurell, K.; Huang, J.; Szymoniak, P.; Pinna, N.; Koch, N.; Adelhelm, P.; Bojdys,* M. J. Angew. Chem. Int. Ed. 2024. DOI: 10.1002/anie.202400382 [OPEN ACCESS]

Innovative research has brought us closer to sustainable battery technology with a breakthrough in sulfur-based cathodes. Traditionally, lithium-ion batteries—central to electronics and electric vehicles—rely on scarce materials like cobalt. Sulfur offers a greener alternative due to its abundance and impressive theoretical capacity of 1675 mAh g^-1.

A major challenge with sulfur has been the “sulfur-shuttle” effect, where sulfur’s mobility leads to rapid battery degradation. However, a recent study introduces a novel solution: encapsulating sulfur within a microporous, imine-based polymer network directly on the current collector. This one-pot synthesis approach not only streamlines production but also significantly boosts battery performance.

This innovative cathode design enables selective electrolyte and Li-ion transport while robustly containing the sulfur, delivering high performance across discharge rates—from 1360 mAh g^-1 at 0.1 C to 807 mAh g^-1 at 3 C. Advanced analysis through DFT calculations and operando Raman spectroscopy has shown that the polymer’s imine groups enhance polysulfide binding, effectively reducing degradation.

This breakthrough paves the way for sulfur-based cathodes to become a viable alternative to metal-based ones, marking a significant step toward greener, high-performance battery technologies. Keep an eye on this space—sulfur could be the future of batteries!

[Press-release] ICSMB “Revolutionary development in the field of battery technology through innovative sulphur cathodes”

DOI: 10.1002/anie.202400382

Emamverdi, F.; Huang, J.; Razavi, N. M.; Bojdys, M. J.; Foster, A. B.; Budd, P. M.; Schönhals, A. Macromolecules 2024. DOI: 10.1021/acs.macromol.3c02419

Researchers have developed a groundbreaking membrane technology by incorporating a novel covalent organic framework (COF), CPSF-EtO, into polymers with intrinsic microporosity (PIM-1), enhancing gas separation efficiency and membrane longevity. This innovative approach led to a significant 50% increase in carbon dioxide permeability and a 27% improvement in CO_2/N₂ selectivity, crucial for applications in carbon capture and natural gas purification. The addition of CPSF-EtO not only facilitates gas transport by creating additional free volume within the membrane but also counteracts the physical aging that typically diminishes membrane performance over time.

This advancement in membrane technology marks a significant leap forward, offering a more sustainable and cost-effective solution for gas separation processes, with promising implications for environmental protection and resource utilization.

Emamverdi, F.; Huang, J.; Szymoniak, P.; Bojdys, M. J.; Böhning, M.; Schönhals, A. Mater. Adv. 2024. DOI: 10.1039/d3ma01123b

Scientists have identified a glass transition in amorphous covalent organic frameworks (COFs), a finding that challenges the conventional understanding of these materials. The research focused on two novel phosphinine-based COFs, distinguished by methoxy (CPSF-MeO) and ethoxy (CPSF-EtO) groups, revealing significant differences in their thermal behavior and structure.

The analysis demonstrated that CPSF-EtO transitions into a glass state at a temperature approximately 100 K higher than CPSF-MeO, attributed to the different ways in which the molecular layers stack and interact. This behavior was confirmed through both calorimetry and dielectric measurements, suggesting that these amorphous COFs exhibit glass-like properties.

This breakthrough opens up new possibilities for the application of COFs in various technologies, including gas storage and separation, by harnessing their unique structural and thermal characteristics.

Burmeister,* D.; Eljarrat, A.; Guerrini, M.; Röck, E.; Plaickner, J.; Koch, Ch. T.; Banerji, N.; Cocchi, C.; List-Kratochvil, E. J. W.; Bojdys,* M. J. Chem. Sci. 2023. DOI: 10.1039/D3SC00667K

PTI nano-crystals have quenched electroluminescence. Disorder at crystal interfaces limits charge transport in PTI films. For future device applications, single crystal devices using electron transport in the lowest conduction band show promise.

Interestingly, this is one of the first (?) publications in the chemical sciences that was openly co-authored by OpenAI’s GPT-3 that we used for the generation of the introduction section (see Acknowledgements). When generating an “Aristotelian narrative” (introduction, crisis, outlook), GPT was incredibly fast and effective.

We hope that this publication will contribute to a long-overdue discussion in academic publishing on whether the the static and “dead” publication in form of a PDF (especially as a summative “review“ article) still is relevant and appropriate. In short: do we still need narrative publications, or should we aim for “Impact, not impact factor”.

Huang, J.; Martin, A.; Urbanski, A.; Kulkarni, R.; Amsalem, P.; Exner, M.; Li, G.; Müller, J.; Burmeister, D.; Koch, N.; Brezesinski, T.; Pinna, N.; Uhlmann, P.; Bojdys,* M. J. Nat. Sci. 2022. DOI: 10.1002/ntls.20210105 & ChemRxiv 2022. DOI: 10.26434/chemrxiv-2021-jmrvw-v3

[Press-release] IDW-online “Neue Produktionsmethode für flexible, langlebige Anoden mit hoher Kapazität im Verhältnis zum Gewicht”

Key Points

• We present a Si-based anode with superior-performance close to the limits of theoretical capacities with an advantage of factor ×10 over any hitherto produced, commercial electrode system.
• Our electrodes sustain physical bending without surface reconstruction or crack formation, and heat shocks without loss of capacity and overall cycling performance.
• The critical, novelty that enables the extraordinary performance increase and durability of our anodes is a class of semi-conducting porous organic polymers that replaces all conventional additives in battery ink formulations.