Hollow nano-metal oxide particle aggregates and manufacturing method thereof

Nano-metal oxide aggregates with internal voids formed via electrospinning and the Kirkendall effect

This technology involves forming polymer-metal oxide composite fibers through an electrospinning process, followed by reduction and oxidation heat treatment (inducing the Kirkendall effect) to create internal voids within the metal oxide particles, which are then uniformly dispersed within a carbon support.

When using metal oxides as secondary battery electrode materials, there have been issues with structural instability, particle aggregation, and degraded electrical properties caused by rapid volume expansion during charge and discharge cycles.

By introducing a hollow structure within the metal oxide particles, this technology accommodates the mechanical stress caused by volume expansion during charging and discharging. Furthermore, the surrounding carbon support prevents particle aggregation, maintaining structural stability and electrical performance, thereby providing a distinct competitive advantage in the secondary battery market.

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Key Features:

• Hollow nano-metal oxide particle aggregates with an average particle diameter of 0.1 to 5000 nanometers and a shell thickness of 0.01 to 1000 nanometers
• Nano-metal oxide particle aggregates formed from fiber structures produced via an electrospinning process
• Configuration that forms internal voids within particles through reduction and oxidation heat treatment after creating polymer-metal oxide composite fibers
• Configuration that induces the Kirkendall effect to form hollow metal oxide particles and composites them with carbon

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