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Under severe knocks of internal combustion engines, parts like pistons and spark plugs are vulnerable to be damaged by energy convergence of shock waves. Furthermore, the damaged positions and failure modes have a significant regularity. In order to reveal the mechanism and avoid such damage, numerical simulations combined with detonation bomb experiments were conducted to explore the energy convergence...
A waterproof membrane made in-house is applied on the lithium air battery, which can effectively block the water molecules and carbon dioxide in the air, so as to reduce the occurrence of the side reaction, e.g. lithium ions react with water or carbon dioxide to form lithium hydroxide or lithium carbonate. Physicochemical analyses are conducted via XRD (X-ray diffraction), SEM (scanning electron microscope),...
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