Electrochemical Performance of High-Valence Mo and Low-Valence Mn Doped- Na V (PO ) @C Cathode for Sodium-Ion Batteries.

The sodium superionic conductor (NASICON)-Na V (PO ) (NVP) is an attractive cathode for sodium-ion batteries, which is still confronted with limited rate performance due to its low electronic conductivity. In this paper, a chemical strategy is adopted to partially replace V of the NVP framework by low-valence Mn and high-valence Mo substitution. The crystal structure, sodium-ion diffusion coefficient and electrochemical performance of Mn-Mo-doped [Na V Mo Mn(PO ) @C] cathode were investigated.

Torque Production Using Handwheels of Different Size During a Simulated Valve Operation Task.

Opening and closing valves in industrial facilities often requires operators to use bars and wrenches as levers (cheaters) in order to overcome initial actuation forces. In order to determine more appropriate operational specifications, the maximum torque production capability was measured when 12 male participants used 4 different valve handwheels at 3 different heights and 2 different angles (in relationship to the coronal plane). The results indicate that the participants produced significantly greater torque when the largest of the 4 wheels (40.

Torque Production Using Hand Cranks in a Simulated Gear-Operated Valve Opening Task.

Hand cranks are used in a variety of industries to actuate valves and in other gear-operated applications. In order to evaluate these types of operations and their compatibility with operator strength capabilities, a rotational dynamometer was used to measure torque production capability of operators using a hand crank at different heights and angles (with respect to the coronal plane). The tests were conducted for both clockwise and counterclockwise rotations using the dominant arm of each test participant.