Co_3O_4 nanocrystalline-assembled mesoporous hollow polyhedron nanocage-in-nanocage as improved performance anode for lithium-ion batteries

摘要

Co3O4 nanocrystalline-assembled mesoporous hollow polyhedron nanocage-in-nanocage is synthesized through a metal-organic-framework-engaged strategy that relies on the unique chemical reactivity properties of zeolitic imidazolate framework-67. As anode material for lithium ion batteries, Co3O4 nanocagein-nanocage shows high specific capacity (1271 mAh g(-1) at 0.1C at the 2nd cycle) and good cycling stability (the capacity retention of 81.6% after 100 cycles), which can be attributed to beneficial effects of Co3O4 nanocrystalline and the mesoporous hollow nanocage-in-nanocage structure. (C) 2018 Elsevier B.V. All rights reserved.