Articles tagged with "organic-materials"
China's organic lithium EV battery aces -94°F to 176°F temperature test
Researchers from Tianjin University and South China University of Technology have developed a practical organic lithium battery prototype using a newly designed n-type conducting polymer, poly(benzodifurandione) (PBFDO), as the cathode. This organic cathode material offers advantages over traditional cobalt- and nickel-based lithium-ion batteries due to its abundance, structural flexibility, and tunable electrochemical properties. The prototype cells demonstrated robust mechanical integrity under bending, stretching, and compression, passed rigorous safety tests including needle puncture without failure or uncontrolled energy release, and showed potential for flexible electronics and wearable applications. The 2.5 amp-hour pouch cells built with PBFDO achieved an energy density exceeding 250 watt-hours per kilogram and operated effectively across a wide temperature range from approximately -94°F to 176°F. They also exhibited a high areal capacity (~42 mAh/cm²) and mass loading (up to 206 mg/cm²), placing their performance close to that of conventional lithium-ion batteries
energylithium-ion-batteriesorganic-materialsbattery-technologyconductive-polymersflexible-electronicssustainable-energyOrganic-powered perovskite speeds neutron, X-ray and gamma detection
Researchers at the University of Oklahoma have developed novel hybrid perovskite materials that leverage the organic component to achieve rapid and efficient light emission under radiation, challenging the traditional focus on the inorganic portion of perovskites. By embedding organic molecules called stilbenes into two-dimensional layered halide perovskite structures, the team achieved a fivefold increase in light emission efficiency compared to the organic molecules alone. This enhanced light emission, which originates from the organic part of the hybrid material, is crucial for fast scintillation properties needed in neutron, X-ray, and gamma radiation detectors. The organic light emission occurs faster than inorganic emission, making these materials particularly suitable for applications requiring rapid radiation detection. Additionally, the hybrid perovskites demonstrated strong environmental stability, maintaining performance for over a year in open air without protective coatings. According to the researchers, these materials perform on par with current state-of-the-art fast radiation detectors, and further optimization could surpass existing technologies. This work, published in the Journal
materials-scienceperovskiteorganic-materialsradiation-detectionscintillationhybrid-materialsoptoelectronicsGame-changing solid battery material moves ions as fast as liquid
Scientists at the University of Oxford have developed a novel class of organic materials called state-independent electrolytes (SIEs) that maintain high ionic conductivity even after solidifying, challenging the long-held electrochemical principle that ion movement slows drastically when a liquid electrolyte solidifies. These SIEs enable ions to move through solid structures as quickly as they do in liquid form, overcoming the "freezing out" effect that has hindered the performance of solid-state batteries compared to their liquid-based counterparts. The key innovation lies in the molecular design: disc-shaped molecules with flexible sidechains stack into rigid columns while their "soft bristles" create a permeable environment, allowing negative ions to flow freely through the solid matrix. This breakthrough offers significant advantages for battery manufacturing and safety. The electrolyte can be heated and poured as a liquid to thoroughly infiltrate battery electrodes, then cooled to form a stable solid that eliminates leakage and fire risks typical of liquid electrolytes, all without sacrificing performance. Due to their lightweight, flexible
energysolid-state-batteryelectrolyteionic-conductivitymaterials-scienceelectrochemistryorganic-materialsBlue-jeans indigo dye could make future solid-state batteries greener
Researchers at Concordia University have discovered that indigo dye, historically used for coloring denim, can significantly improve solid-state lithium-ion batteries. Unlike traditional liquid electrolytes, solid-state batteries use solid materials for lithium-ion movement, enhancing safety and energy capacity. The study found that indigo not only stores and releases lithium ions but also activates the solid electrolyte, creating a synergistic effect that boosts the battery’s overall capacity beyond what either component could achieve alone. Additionally, these batteries maintain stable performance even at temperatures as low as minus ten degrees Celsius, addressing a common limitation of organic-material-based batteries. This breakthrough is notable because organic materials typically struggle with instability when integrated into solid-state batteries due to excessive interactions with solid components. However, the controlled reaction between indigo and the electrolyte in this research enables steady and predictable battery chemistry, which is crucial for developing greener, more sustainable energy storage solutions. The use of natural molecules like indigo could simplify supply chains, reduce costs, and support the transition to more accessible
energysolid-state-batteriesindigo-dyeorganic-materialsbattery-technologysustainable-energylithium-ion-batteriesL
Scientists at UNSW Sydney have developed a breakthrough technique that could significantly boost the efficiency of silicon solar panels by using a process called singlet fission. This method allows a single photon of sunlight to be split into two packets of energy, potentially doubling the electrical output from the same amount of light. Traditional silicon panels convert about 27 percent of sunlight into electricity, with a theoretical limit near 29.4 percent, largely due to energy lost as heat. The UNSW team discovered that an organic compound called DPND (dipyrrolonaphthyridinedione) can perform singlet fission while remaining stable under outdoor conditions, overcoming previous limitations seen with materials like tetracene. The research builds on over a decade of work led by Professor Tim Schmidt, who first used magnetic fields to understand the molecular mechanisms of singlet fission. By adding an ultra-thin organic layer of DPND on top of conventional silicon cells, the team demonstrated a practical way to harness excess energy
energysolar-panelssinglet-fissionsilicon-technologyphotovoltaic-efficiencyorganic-materialsrenewable-energySolar cells hit record 19.96% efficiency with 6x cheaper polymer
energysolar-cellsorganic-materialsefficiencysustainable-energypolymer-technologycost-reductionMetal-free solar battery stores power for 2 days with 90% retention
energysolar-batteryorganic-materialsenergy-storagesustainable-technologysolar-harvestingcharge-retention