Nippon Electric Glass has developed a new negative electrode material using a glass-ceramic for the all-solid-state Na-ion secondary battery, and became the first to successfully operate an all-oxide all-solid-state Na-ion secondary battery integrated with a glass-ceramic positive electrode and a solid electrolyte.

The proposed all-solid-state Na-ion secondary battery has an output voltage of 3 V, it possesses great application prospects and its performance is comparable to that of the existing lithium-ion rechargeable batteries.

In contrast to Li-ion versions a Na-ion secondary battery utilises abundant metals, such as sodium and iron, and does not require any rare metals, such as lithium, cobalt or nickel. In addition, since the battery comprises a stable oxide material, it does not ignite nor generate harmful gas, even when pierced by a nail or knife.

Achieving a carbon-free society becomes possible by commercialising the all-oxide all-solid-state Na-ion secondary battery as it uses affordable resources and is very safe when operated.

www.neg.co.jp

Image: NEG solid state battery uses highly abundant sodium instead of lithium