Role of H 3 O· Radical in the Degradation of Fuel Cell Proton-Exchange Membranes
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-37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL C↗
Engineering topics
Long, Hai
Publications and source records attributed to Long, Hai.
Helical Covalent Polymers with Unidirectional Ion Channels as Single Lithium-Ion Conducting Electrolytes
Single-ion conducting polymer electrolytes have attracted great attention as safe alternatives to liquid electrolytes in high energy density lithium-ion batteries. Herein, we report the first example of a crystalline anionic helical polymer as a single lithium-ion conducting solid polymer electrolyte (SPE). Single-crystal X-ray analysis shows that the polymer folds into densely packed double helices, with bundles of unidirectional negatively charged channels formed that can facilitate lithium-ion transportation. Such a helical covalent polymer ( HCP) exhibits excellent room temperature lithium-ion conductivity (1.2 x 10 -3 S cm -1 ) in the absence of external lithium salts, a high transference number (0.84), low activation energy (0.14 eV), and a wide electrochemical stability window (0.2-5 V). We found that nonflammable, nonvolatile ionic liquid can serve as a solvating medium and excellent conductivity enhancer (>1000 times increase). These ion-conducting properties are comparable to the best polyethylene oxide-based polymer electrolytes mixed with lithium salts. Finally, we show that the solvated HCP SPE enables the reversible cycling of an all-solid-state cell prepared with a high-voltage NMC 811 cathode. Our study opens up new possibilities for developing next-generation high-performance solid-state electrolytes.
25 ENERGY STORAGE↗
Carbohydrate-binding module O -mannosylation alters binding selectivity to cellulose and lignin
Improved understanding of the effect of protein glycosylation is expected to provide the foundation for the design of protein glycoengineering strategies.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Finite-Surface Integration Algorithm for Improving the Forecast of Cloudy-Sky DNI
This presentation provides an overview of a finite-surface integration algorithm for forecasting cloudy-sky direct normal irradiance in the circumsolar region.
14 SOLAR ENERGY↗
Defect chemistry of disordered solid-state electrolyte Li 10 GeP 2 S 12
Most solid-state electrolytes exhibit significant structural disorder, which requires careful consideration when modeling the defect energetics. Here, we model the native defect chemistry of a disordered solid electrolyte, Li 10 GeP 2 S 12 .
30 DIRECT ENERGY CONVERSION↗