Pissoort mentioned the possibility of VRFBs in the 1930s. NASA researchers and Pellegri and Spaziante followed suit in the 1970s, but neither was successful. presented the first successful demonstration of an All-Vanadium Redox Flow Battery employing dissolved vanadium in a solution of in the 1980s. Her design used sulfuric acid electrolytes, and was patented by the [pdf]
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Dynamic modulus (sometimes complex modulus ) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation). It is a property of materials. ，，。 ，，Maxwell，。 ：，，。 ，，，、。. .
，，。 ，，Maxwell，。 ：，，。 ，，，、。. .
G' > G'' ： （elastic solid), (Viscous fluids）。 “X”（1）， （2），。 G' < G''： 。 （，）. .
（storage modulus） ， 。 ，， [1] [3]。 ， ，Maxwell， [1-2]。 ：，， [3]。. .
σ ()＝Eε ()，σ，ε，E，，。 （ThomasYoung1773～1829），，。 1807，，。 (^_^) 2. E (Elastic Modulus) E ()，。 ，，，，）。. .
DMA (Dynamic Mechanical Analyzer)， (Storage Modulus)， (Loss Modulus)， (Tan delta) ()。 (Tg, Glass transition temperature)。 5， (Master curve)。 PCB: DMAPCB，、。 :. [pdf]
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