<p>➀ Researchers from KERI have developed lithium-sulphur battery prototypes with high energy density, eight times higher than lithium-ion batteries.</p><p>➁ The team used single-walled carbon nanotubes treated with oxygen to stabilize the electrodes and reduce sulfur loss.</p><p>➂ A 1000mAh prototype measuring 50x60mm retained 85% of its charge after 100 charge/discharge cycles.</p>