This technology constructs an electrode active material by intercalating mesoporous metal oxide nanoparticles between layers of nitrogen-doped reduced graphene oxide (rGO). This structure prevents particle re-aggregation and maximizes mass transfer efficiency through macro-pores formed between the layers.
Existing sodium-ion secondary batteries and hybrid capacitors have faced issues with kinetics mismatch between the anode and cathode due to the slow diffusion of sodium ions, as well as performance degradation caused by the re-aggregation of active materials.
This technology modifies mesoporous metal oxide-silica particles with polar organosilanes to induce electrostatic bonding with negatively charged graphene oxide. Through heat treatment, the graphene is reduced and nitrogen-doped, and the silica is subsequently etched away. This creates a nanocomposite structure where metal oxide nanoparticles are dispersed between graphene layers, which can be utilized to enhance both the quality and productivity of secondary batteries.
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