High capacity of microspheric manganese and cobalt trimesic dual-metal organic framework for Li-ion battery

摘要

Metal organic frameworks (MOFs) have received great interest for Li-ion batteries (LIBs) owing to their variable structure and morphology. Herein, a microspheric manganese and cobalt trimesic dual-metal organic framework (MnCo-T) with diameters between 1 and 2 mu m has been synthesized. The microspheric MnCo-T retains a high capacity of 819 mAh g(-1) at 200 mA g(-1) after 200cycles and exhibits good rate performance (148 mAh g(-1) at 4000 mA g(-1)). Notably, it can maintain a considerable lithium storage capacity (337 mAh g(-1) after 600 galva-nostatic charging/discharging cycles at 1000 mA g(-1)), indicating that the design of dual-metal organic frame-works is an effective strategy for enhancing Li storage performance.

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