Chinese engineers have created a new type of sodium-sulfur battery that could be a cheaper and safer alternative to lithium cells.

Lithium is being used as a key battery material in a growing number of electronic devices. But lithium batteries are proving to be a safety hazard and expensive due to their heating properties and difficulties in obtaining the material.

Researchers around the world are searching for battery materials that have better and more desirable properties.

Previous attempts to develop sodium-sulfur batteries have faced several practical obstacles, the biggest of which was the need for large amounts of sodium metal, which has hindered their widespread use.

These early designs also faced........

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