The Union Pacific FEF series consists of 45 4-8-4 "Northern" steam locomotives built by the American Locomotive Company (ALCO) between 1937 and 1944 and operated by the Union …

The Union Pacific FEF-2 is the second batch of the FEF Series (FEF meaning, "four-eight-four") which consisted of fifteen 4-8-4 "Northern" steam locomotive types built by the American …

Iron(II) fluoride or ferrous fluoride is an inorganic compound with the molecular formula FeF 2. It forms a tetrahydrate FeF 2 ·4H 2 O that is often referred to by the same names. The …

2020年2月24日 · Herein, we present a new one-pot, single-step, high-yield method for the colloidal synthesis of FeF 2 nanorods from a single-source precursor. The resulting 20 nm …

2012年2月1日 · Among all metal fluorides, FeF 2 with theoretical voltage of 2.66 V is considered a promising cathode material for the application of lithium ion battery owing to its low cost and …

fef-2 The second batch of 15 locomotives, numbered 820–834, was delivered in 1939. Their improvements included larger cylinders, better tractive effort, smoke deflectors on the sides of …

These locomotives were designated as Class FEF-2. They were designed to have 80" drivers, 25 x 32 cylinders, a boiler pressure of 300 psi, and a weight of 483,000 lbs giving each a tractive …

2019年3月12日 · In this study, the impacts of electrolyte composition on the performance and stability of nanostructured FeF 2 cathodes are systematically investigated. Dramatic impacts of …

二氟化铁 (FeF 2 ) 的高理论容量 (571 mAh/g) 和能量密度 (1519 Wh/kg) 使其成为用于锂基电池的有前途的转换阴极材料，提供了与材料导电性和反应性相关的固有限制是可以克服的。

摘要 转换型正极材料(FeF 2)因高具有理论比容量、廉价与环境友好等优点而有望成为新一代锂离子电池正极材料,但其目前却受到本征导电性差、界面副反应与结构衰减等问题的严重制约。 …