Porous lithium cobalt oxide fabricated from metal-organic frameworks as a high-rate cathode for lithium-ion batteries

Abstract

Porous materials have many applications, such as energy storage, as catalysts and adsorptionetc.Nevertheless, facile synthesis of porous materials remains a challenge. In this work, porous lithium cobalt oxide (LiCoO2) is fabricated directly from Co-based metal-organic frameworks (MOFs, ZIF-67) and lithium saltviaa facile solid state annealing approach. The temperature affect on the microstructure of LiCoO2is also investigated. The as-prepared LiCoO2shows a uniform porous structure. As a cathode for a lithium-ion battery (LIB), the LiCoO2delivers excellent stability and superior rate capability. The as-prepared porous LiCoO2delivers a reversible capacity of 106.5 mA h g−1at 2C and with stable capacity retention of 96.4% even after 100 cycles. This work may provide an alternative pathway for the preparation of porous materials with broader applications.