Cone and disc carbon structures for durable, scalable and green sodium- and potassium-ion anodes, reducing reliance on lithium

https://www.eurekalert.org/news-releases/1082154

"scalable pyrolysed hydrocarbon byproduct made into pure graphitic structures... sodium/ potassium ions too big/ interactions too complex to slide in/ out of graphite’s tightly packed layers, overcome with cone/ disc curvature/ spacing welcoming these ions without need for chemical doping or other artificial modifications... stored 230 mAh/g, still holding 151 mAh/g after 2K fast charging cycles... not quite as good using potassium... cheaper, sustainably synthesized from oil/ gas industry byproducts"