Waste-derived sodium battery material reaches 1,062 mAh/g after 300 cycles

Chinese researchers made a sodium-ion battery anode from waste phone batteries and industrial lignin.

The dual-sulfide, lignin-derived carbon design improved conductivity and sodium storage performance.

It delivered an initial capacity of 1,062.8 mAh/g and retained 207 mAh/g after 300 cycles.

The work suggests a cheaper, more sustainable path for grid-scale energy storage using two waste streams.