It has obtained 73 patents related to multi-projection system in Asia, Europe and North America. ScreenX Solution is a multi-projection technology capable of automatic content reconstruction according to various auditorium structure, integration quality management and distribution to theaters. The design strategy proposed is believed to be broadly applicable, considering numerous options of organic reactions and functional monomers that can be utilized to construct polymer frameworks, and directs the fit-for-purpose design of membranes according to practical application demand.Acquisition of 80 patents related to multi-projection system in Asia, Europe and North America This work highlights the importance of secondary interactions to develop high-performing ion-transport membranes. These data related to energy efficiency and capacity utilization far surpass those for otherwise identical cells assembled with commercial membranes and state-of-the-art ion-sieving membranes. The membrane delivered a neat area-specific resistance as low as 0.17 Ω cm 2, and thus enabled stable cell operation at extreme current densities, from 200 to 500 mA cm -2, with both high energy efficiency and high-capacity utilization. These framework membranes exhibited both extremely low permeability of active materials and ultrahigh ion diffusivity, and their advantages were exemplified as ion-conducting membranes in 2,6-dihydroxy anthraquinone / K 4 aqueous organic redox flow batteries. This is achieved by the robust micropore confinement within the rigid pore channels and multi-interaction between ion and membrane. With proper control over the chemistry of rigid pore channels, the researchers observed near-frictionless ion flow within the all-rigid triazine framework polymer membrane (SCTF-BP), with the ion diffusion coefficient close to value in water. Their rigid channels ensured high selectivity from size-sieving, thus enabling extremely low permeability of active materials. In a study published in Nature on April 26, the research team led by Professor Xu Tongwen and Professor Yang Zhengjin from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS), and their collaborators, proposed a new type of ion exchange membrane-triazine framework polymer membranes-which can break the conductivity-selectivity trade-off.Ĭompared to traditional materials, the triazine framework polymer membranes exhibited much enhanced capacity in both anti-swelling and anti-aging, showing an extremely low swelling ratio on water absorption.
This trade-off presents a challenge in developing membrane materials that meet the required performance criteria. However, the existing polymer membranes suffer from a ubiquitous "conductivity-selectivity" trade-off: highly conductive membranes tend to exhibit low selectivity and vice versa. Polymer materials have the advantages of low cost, manufacturing scalability and small footprint, and thus dominate the use of ion-transport membranes in practical modules. These membranes must screen out specific substances to prevent crossover while efficiently conducting specific ions. Ion-transport membranes are vital components of clean-energy technologies, such as CO 2 electrolyzers, water electrolyzers, fuel cells, redox flow batteries and ion-capture electrodialysis. Structure rigidity and microporosity of the CTF membrane can be regulated by designing variable structural units, as demonstrated at bottom right, from flexible to very rigid. Image (f) shows a free-standing CTF membrane with a diameter of over 10 cm. CTF membranes have a controlled number of ion-conductive moieties inside membrane pores and a covalent network structure. e,f, Preparation of stand-alone CTF membranes via a superacid-catalyzed organic sol-gel reaction from functional aromatic nitrile monomers (e). Pore architecture and chemistry are tuned for rapid and selective ion transport. These are expected to build from bottom-up synthesis and via swelling-resistant 3D polymer frameworks (d). c,d, Our proposed membranes with rigid ion channels (c). Membranes may age over time and swell in water. To render the membrane ion conductive, functional moieties are incorporated during postsynthetic modification. The channels are formed by intrinsic micropores resulting from inefficient polymer chain packing, represented by polymers of intrinsic microporosity and their derivatives. b, Ion-selective microporous membranes with semirigid ion channels. These contain microphase-separated morphology derived from the assembly of hydrophilic ion-conductive moieties and hydrophobic flexible-polymer backbones, represented by Nafion. Schematic illustrations showing existing and proposed ion-selective polymer membranes with varying ion channels.
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