Enhancing Li-O battery performance with conductive hierarchical metal-organic framework composite cathodes.

Li-O batteries are recognized for their high theoretical capacity and energy density, positioning them as excellent candidates for next-generation energy storage. This study explores the use of Metal-Organic Frameworks (MOFs) with high specific surface areas and open metal sites as cathode materials to address existing challenges. We developed conductive "cactus-like" composites by employing hydroxylated graphene (G-OH) as a substrate to grow columnar M(HHTP) and MM(HHTP) (M = Cu, Ni) in a one-pot synthesis, enhancing the structure's conductivity and order.

[Droplet freeze-thawing system based on solid surface vitrification and laser rewarming].

Ultra-rapid cooling and rewarming rate is a critical technical approach to achieve ice-free cells during the freezing and melting process. A set of ultra-rapid solid surface freeze-thaw visualization system was developed based on a sapphire flim, and experiments on droplet freeze-thaw were carried out under different cryoprotectant components, volumes and laser energies. The results showed that the cooling rate of 1 μL mixed cryoprotectant [1.