Oxygen-deficient and orderly mesoporous cobalt oxide nanospheres for superior lithium storage

•3DOM Co3O4−X nanospheres were developed via a nanocasting method.•The 3DOM structure enhances mass transfer and restrains volume expansion.•The oxygen vacancies in Co3O4−X promote the electron and Li+ conductions.•The 3DOM Co3O4−X anode enables high-capacity and long-lasting lithium storage. 3DOM C...

Ausführliche Beschreibung