Lithium ion batteries (LIBs), a fast-developing technology area in electric energy storage, are promising power sources for a wide range of portable electronic devices. A variety of new materials can be used in LIBs for enhanced properties. For example, metal-organic frameworks (MOFs) can be potentially substituted for graphite (372 mA h g−1) in current platforms to meet the demand for high capacities because metal centers and organic components are coordinated together for increased insolubility and stability in the electrolyte. Moreover, enhanced electrochemical performance can be achieved by the combination of dual redox-active metal centers and organic ligands. As a continuation of previous research of our group on coordination chemistry,1 we studied the use of a one-dimensional metal-organic material [Co1.5L(H2O)4]n (H3L = 4-hydroxypyridine-2,6-dicarboxylic acid) as a new type of electrode material for LIBs,2 which exhibits a much higher reversible capacity of 431 mA h g-1 because of the redox activities both on metal center and ligand site. Furthermore, a new electrode material through the thermolysis of MOF has been synthesized and exhibited excellent performance as an electrode material. A mono-dispersed SnO2 particles within three-dimensional porous carbon frameworks (SnO2@C) was obtained and studied as an electrode material for LIBs.3 This processing method can relieve the volume expansion during the charge–discharge processes and greatly enhance the electronic conductivity. This composite exhibits a high reversible capacity of 900 mA h g−1 at 100 mA g−1 after 50 cycles, with a stable capacity retention of 880 mA h g−1 at 100 mA g−1 even after 200 cycles. We also reported a nanostructured NiP2@C synthesized by calcination of Ni-MOF-74 with adsorptive red phosphorus, which was tested as an anode material.4 The in situ introduction of porous carbon round NiP2 nanoparticles greatly enhanced the electronic conductivity and showed excellent electrochemical performance.

Coordination chemistry approach for lithium ion batteries

253rd National Meeting (2017)

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