Nanostructured Alloy-Based Anode Inducing Diffusion-Controlled Reactions

Diffusion-Controlled Reaction Anode with Nanodot Alloy Embedded in a Carbon Matrix

This technology achieves isotropic ion diffusion by reducing alloy-based anode particles into nanodots and embedding them into a carbon matrix, which induces a single-phase reaction instead of a two-phase reaction during charge and discharge cycles.

Conventional alloy-based anodes suffer from performance degradation in cycle life and power output due to non-uniform ion diffusion and volume expansion, which lead to interface-controlled reactions, phase separation, particle pulverization, high activation energy, and mechanical failure.

By utilizing a dual-polymer protection and calcination method, this technology reduces alloy-based anode particles to a size of 0.5–30 nm and composites them with a carbon matrix. This increases the critical nucleation energy and narrows the miscibility gap, thereby enhancing the value of secondary battery anode applications.

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Key Features:

• Alloy-based anode particles consisting of nanodots made from a carbon matrix and a metal selected from bismuth, silicon, tin, or similar materials.
• An anode comprising means for inducing a diffusion-controlled reaction by reducing alloy-based anode particles into a nanodot form.
• A configuration where nanodot-shaped alloy-based anode particles are embedded and composited within a carbon matrix.
• A nanostructured anode that mitigates volume change and degradation by inducing a single-phase reaction instead of a two-phase reaction during charge and discharge.

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