An inorganic-organic hybrid supramolecular framework as a high-performance anode for lithium-ion batteries

Herein, an excellent anode was achieved for a lithium-ion battery based on a polyoxometalate-organic framework [Ni-5(OH)(3)(trzS)(3)(en)(H2O)(B-alpha-PW9O34)] for the first time. It can deliver a capacity of 710 mA h g(-1) at 100 mA g(-1) after 50 cycles and a high capacity retention of 82.2% after 500 cycles at a high rate of 800 mA g(-1), which is supposed to be due to the unique porous characteristic and high chemical stability of the proposed anode. The higher capacity was ascribed to Ni and W of the building unit taking part in lithium storage.