Jules Oppenheim

@jules-oppenheim.bsky.social

"Reticular" inorganic chemistry. Dincă Lab at MIT. Blender and entomological enthusiast. https://sites.mit.edu/oppenheim/

Excited to share our most recent paper! We investigate the structure of LnHOTP, the only proven metallic MOF which induces a charge density wave phase. This tour-de-force contains diffuse scattering, aperiodicity, and high pressure synchrotron XRD. Read about it here: pubs.acs.org/doi/10.1021/...

Evidence for an Electronically Driven Charge Density Wave in a 1D Metallic MOF

Charge density wave (CDW) phases are unconventional quantum states that often arise in low-dimensional metallic systems and are themselves found alongside other exotic phenomena. Finding such states i...

pubs.acs.org

Thrilled to share the last work from my PhD! We examined the pore cation effect on water sorption, finding hydrophilicity trends with a Hofmeister series (the cations are changing the "solubility of water in the MOF"). Mg-SU-102 is great at pulling water from dry air! www.nature.com/articles/s41...

High-capacity water sorbent cycles without hysteresis under dry conditions - Nature Communications

There is a lack of water sorbents capable of cycling water vapor under dry conditions without hysteresis or decomposition. Here, the authors demonstrate that the anionic MOF SU-102 exhibits high-capac...

nature.com

Best sodium-ion battery cathode out there, bar none! High energy, high power, long lasting, safe and cheap batteries made from C, N, O, H, and Na! #organicbattery #Sodiumbattery pubs.acs.org/doi/10.1021/...

High-Energy, High-Power Sodium-Ion Batteries from a Layered Organic Cathode

Sodium-ion batteries (SIBs) attract significant attention due to their potential as an alternative energy storage solution, yet challenges persist due to the limited energy density of existing cathode materials. In principle, redox-active organic materials can tackle this challenge because of their high theoretical energy densities. However, electrode-level energy densities of organic electrodes are compromised due to their poor electron/ion transport and severe dissolution. Here, we report the use of a low-bandgap, conductive, and highly insoluble layered metal-free cathode material for SIBs. It exhibits a high theoretical capacity of 355 mAh g–1 per formula unit, enabled by a four-electron redox process, and achieves an electrode-level energy density of 606 Wh kg–1electrode (90 wt % active material) along with excellent cycling stability. It allows for facile two-dimensional Na+ diffusion, which enables a high intrinsic rate capability. Growth of the active cathode material in the presence of as little as 2 wt % carboxyl-functionalized carbon nanotubes improves charge transport and charge transfer kinetics and further enhances the power performance. Altogether, these allow the construction of SIB cells built from an affordable, sustainable organic small molecule, which provide a cathode energy density of 472 Wh kg–1electrode when charging/discharging in 90 s and a top specific power of 31.6 kW kg–1electrode.

pubs.acs.org