A brand-new bimetallic copper-lithium HEDP complex of fast ion migration as a promising anode for lithium ion batteries

A 3-dimensional (3D) structural copper-lithium bimetallic coordination polymer is synthesized via a facile hydrothermal method. Linked by the hydrogen bonds between adjacent 2-dimensional (2D) layers, the constructed hybrid 3D supramolecular frameworks and its unique ordered skeleton structure can provide stable channels for Li+ insertion and extraction. Modified with graphene nanoplatelets, the designed composite shows superior durability with a specific capacity of 369 mAh/g after 100 cycles at a current density of 50 mA/g. In addition, the rate performance indicates a decent ability of the composite for fast Li+ migration. These results reveal a promising perspective of coordination polymer for applying as an anode material of lithium ion batteries.