Switzerland tries to replace lithium development battery with sodium magnesium material

Lithium batteries have been widely used, but they have obvious shortcomings. First, the source of lithium-containing materials is limited. Second, the use of flammable liquid electrolytes in lithium batteries is flammable and explosive, and the safety risks are high. With the support of the Swiss National Research Foundation, the Swiss Federal Institute of Materials, the University of Geneva and the Paul Schell Institute have jointly launched a research project since 2015, trying to replace the lithium battery with sodium-magnesium materials and achieve phase results. .

Switzerland tries to replace lithium development battery with sodium magnesium material

The research team proposed an all-solid-state battery design. The battery uses a solid electrolyte instead of a commonly used liquid electrolyte. The solid electrolyte is a compound containing a nano- or magnesium ion with a crystal structure. The sodium and magnesium ions can be used. Wherein motion, the movement of electrons between the electrodes of the positively charged ions causes electron transfer to generate current.

According to the experimental results, at normal temperature (20 degrees Celsius), sodium ions can move in the solid electrolyte, and the solid electrolyte does not burn, and remains chemically stable at 300 degrees Celsius, so the safety is greatly increased. Due to the wide range of sources of sodium materials, it is almost infinite compared to lithium materials. Although the battery made of sodium material has a lower density of stored electric energy than the lithium battery, it has the possibility of replacing the lithium battery in the case where the capacity of the energy storage unit is not high, so this result has important application value.

Solid electrolytes developed for magnesium materials also have good properties in which magnesium ions can move at 70 degrees Celsius. Compared with some of the earlier research results, the same conductivity requires 400 degrees Celsius. Researchers believe that significant progress has been made in the right direction, demonstrating the potential and feasibility of further improvement. Considering that magnesium ions are twice as large as lithium ions, and have more material sources and better chemical stability, it is more attractive to replace lithium with lithium as a battery material.

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