Sigma-Aldrich 2D Silicon Silicon Anode Material For &

Our 2D Silicon is an advanced material designed to enhance lithium-ion battery performance by addressing common challenges associated with traditional silicon-based electrodes. Typically, silicon undergoes significant volumetric expansion during charge cycles, which can lead to rapid degradation and shorter battery life. The unique two-dimensional layered structure of 2D Silicon provides necessary space to accommodate these volume changes, thereby improving the stability and longevity of battery electrodes.

2D Silicon is well-suited for high-performance lithium-ion batteries, offering significant improvements in capacity, stability, and longevity. This material can be integrated into battery preparation processes with relative ease:

• Handling: 2D Silicon is mildly water-sensitive; it should be protected from moisture or handled in a glovebox to maintain its performance.
• Anode Preparation: Mix 2D Silicon with graphite using grinding, ball-milling, or acoustic mixing to form an effective anode material. A 1:1 ratio is recommended.
• Optimal Graphite Choice: Flake morphology graphite is ideal for a more intimate and effective mix, enhancing the anode′s conductive properties and stability.

2D Silicon′s role in advancing battery technology makes it a pivotal material in both academic research and industrial applications.

Enhanced Cyclability: A blend of 2D Silicon and graphite in a 3:7 weight ratio exhibits impressive cyclability. After 200 cycles, it retains over 85% of its initial capacity. This superior performance is due to the unique structural configuration of 2D Silicon, which maintains electrical contact and minimizes the degradation of the solid-electrolyte interphase (SEI).

Higher Specific Capacity: By blending 2D Silicon and graphite in a 1:1 ratio, we can achieve a higher specific capacity that surpasses 500 mAh/g. This is a significant improvement over graphite′s practical capacity of 360 mAh/g, allowing batteries to store more charge.

Low Insertion/Deinsertion Potential: 2D Silicon demonstrates a low average potential of 0.5 V vs Li/Li+ when reversibly inserting Li-ions. When combined with graphite in a 1:1 blend, the anode material exhibits an average insertion potential of 0.3 V vs Li/Li+. This low potential contributes to an enhanced overall voltage in the battery.