lithium batteries

The physicochemical properties of lithium salt solutions in the mixtures of sulfolane with dimethyl disulfide were studied. It was established that the introduction of dimethyl disulfide (5–10% mas.) into sulfolane solutions of lithium perchlorate and lithium trifluoromethanesulfonate leads to the increase in their specific ion conductivity, the decrease in the viscosity, and the reduction in the activation energies of the specific ion conductivity and the viscous flow.

To increase the accuracy of determining the lithium cation transference numbers we proposed to measure them at different values of the polarizing voltage and extrapolate the calculated values to the zero value of the polarizing voltage.

In this paper the possibility of applying of hydrolysis lignin as the lithium battery cathode material was demonstrated for the first time. Hydrolysis lignin features have been investigated by impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Electrochemical characterization was carried out at room temperature using 1M LiBF4 in γ-butyrolacton electrolyte system.

Using impedance spectroscopy to assess the degree of discharge of lithium primary (non-rechargeable) batteries produces highly informative results. In order to make the results of impedance spectroscopy more correct, a method is proposed to determine the parameters of preliminary galvanostatic pulse that transfers lithium battery in a reproducible condition, which is largely determined by the state of the passive film of the lithium anode. The proposed technique can be helpful in combination with other methods for diagnostic of lithium batteries.