Open mesoporous spherical shell structured Co3O4 with highly efficient catalytic performance in Li–O2 batteries

摘要: An open mesoporous spherical shell structured (OMSS) Co3O4 was designed and synthesized through a two-step process. The OMSS with diameter around 1 μm is constructed from large number of nanoparticles mainly (111) preferential exposed crystal planes. Superior catalytic activity for oxygen evolution reaction (OER) can be manifested in Li–O2 batteries the charge voltage platform reduced to ∼3.6 V. outstanding performance cycling stability also achieved cut-off specific capacity 1000 mA h g−1 over 60 cycles. fantastic may attributed structure high surface area which improves transport capability oxygen, increases active sites sedimentary space discharge products. It almost gets highest among metal oxide catalysts used reported date.