Lithium-ion electrochemical energy storage

What are lithium-based batteries?

Lithium-based batteries are a class of electrochemical energy storage devices. They are the subject of the article 'Understanding Li-based battery materials via electrochemical impedance spectroscopy' published in Nature Communications.

What is the potential of EIS in understanding battery charge storage?

Lithium-based batteries are a class of electrochemical energy storage devices where the potentiality of electrochemical impedance spectroscopy (EIS) for understanding the battery charge storage mechanisms is still to be fully exploited.

What does EIS measure in an electrochemical energy storage cell?

Already a basic EIS measurement of a typical electrochemical energy storage cell, in which the whole system between both cell’s electrodes is probed, may produce a spectrum in which the reaction (s) that occur on the positive and negative electrode are observed as (well) separated features (e.g. semi-circles in the complex impedance plots).

Why are solid and liquid electrolytes used in energy storage?

Solid and liquid electrolytes are used in energy storage because they allow for charges or ions to move while keeping anodes and cathodes separate. This separation prevents short circuits from occurring in energy storage devices.

Is EIS used in lithium-based battery studies?

A literature survey using databases such as Scopus or Web of Science reveals that EIS is not frequently used in lithium-based battery studies. Only about 6000 research articles out of 115,000 covering LiBs disclose EIS measurements and analyses.

What material can be used for separation in energy storage devices?

Separation prevents short circuits from occurring in energy storage devices. Rustomji et al. show that separation can also be achieved by using fluorinated hydrocarbons that are liquefied under pressure. The electrolytes show excellent stability in both batteries and capacitors, particularly at low temperatures.