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An adhesive composite of hypergravity induced Co3O4 nanoparticles and natural xanthan gum (XG) was prepared and applied as the anode electrode of a Li-ion battery for the first time. The Co3O4 nanoparticles were hydrothermally prepared and assembled on the water–oil interface with the assistance of hypergravity. The discharge capacity of the final nanocomposite anodes with the xanthan gum binder can reach 742.5 mA h g−1 after 50 cycles at a charge–discharge rate of 0.5 C, whereas the Co3O4 working electrode with a traditional PVDF binder only displayed a lower capacity of 219.9 mA h g−1. The addition of the XG binder can improve the electrochemical performance of the hypergravity Co3O4 anode due to its high viscosity, which can relieve the volume expansion of the Co3O4 particles during charge–discharge cycles. What's more, the XG can efficiently transfer Li-ions to the surface of the Co3O4 like polyethylene oxide (PEO) solid electrolytes.

rsc advances

Adhesive nanocomposites of hypergravity induced Co<sub>3</sub>O<sub>4</sub>nanoparticles and natural gels as Li-ion battery anode materials with high capacitance and low resistance

Adhesive nanocomposites of hypergravity induced Co3O4nanoparticles and natural gels as Li-ion battery anode materials with high capacitance and low resistance

Adhesive nanocomposites of hypergravity induced Co₃O₄nanoparticles and natural gels as Li-ion battery anode materials with high capacitance and low resistance