Viscosity of Electrolyte Solutions in Low Temperature Environments.
Mentor 1
Benjamin Church
Location
Union Wisconsin Room
Start Date
24-4-2015 2:30 PM
End Date
24-4-2015 3:45 PM
Description
Lithium ion batteries have found use in many areas from mobile phones to airplanes and the understanding of wettability of materials can prove to be of great importance. Wettability is the ability of getting wet and increased rate wetting of materials inside lithium ion batteries has been linked to increased effectiveness. A lithium ion battery is composed of a positive anode and a negative cathode, which are separated by a separator. The anodes in lithium ion batteries are composed of Carbon black, binder and an active material (copper). Cathodes are also made in a similar way, however, the binder is made of Polyvinyldene Fluoride, the active material is LiCoO2 and aluminum is a conductive additive. The cathodes and anodes are varied on the basis of properties like porosity, thickness, amount of calendaring, structural patterns, and amount of surfactants. Meanwhile electrolytes are varied on the basis of identity and viscosity. This is followed by a range of wettability tests of those anodes and cathodes with different electrolytes. Previous research showed promise that a wetting balance test might be a very economic way to check the efficiency of Lithium ion batteries in manufacturing processes. A sample material is put under a balance and the electrolyte liquid is lifted to it. The mass change of the sample is recorded in a graph of mass vs time. The slope of the graph during the diffusion of electrolyte into the sample is calculated to determine the wetting rate. Hence, the response of each sample to the electrolyte can be compared using the wetting rate values. This research aims to find a set of materials in anode lead to increased wettability such that the efficiency of lithium ion batteries can be increased.
Viscosity of Electrolyte Solutions in Low Temperature Environments.
Union Wisconsin Room
Lithium ion batteries have found use in many areas from mobile phones to airplanes and the understanding of wettability of materials can prove to be of great importance. Wettability is the ability of getting wet and increased rate wetting of materials inside lithium ion batteries has been linked to increased effectiveness. A lithium ion battery is composed of a positive anode and a negative cathode, which are separated by a separator. The anodes in lithium ion batteries are composed of Carbon black, binder and an active material (copper). Cathodes are also made in a similar way, however, the binder is made of Polyvinyldene Fluoride, the active material is LiCoO2 and aluminum is a conductive additive. The cathodes and anodes are varied on the basis of properties like porosity, thickness, amount of calendaring, structural patterns, and amount of surfactants. Meanwhile electrolytes are varied on the basis of identity and viscosity. This is followed by a range of wettability tests of those anodes and cathodes with different electrolytes. Previous research showed promise that a wetting balance test might be a very economic way to check the efficiency of Lithium ion batteries in manufacturing processes. A sample material is put under a balance and the electrolyte liquid is lifted to it. The mass change of the sample is recorded in a graph of mass vs time. The slope of the graph during the diffusion of electrolyte into the sample is calculated to determine the wetting rate. Hence, the response of each sample to the electrolyte can be compared using the wetting rate values. This research aims to find a set of materials in anode lead to increased wettability such that the efficiency of lithium ion batteries can be increased.
