On-chip high-power porous silicon lithium ion batteries with stable capacity over 10000 cycles (Presentation Recording)

Andrew S. Westover; Daniel Freudiger; Zarif Gani; Keith Share; Landon Oakes; Rachel E. Carter; Cary L. Pint

doi:10.1117/12.2191668

5 October 2015 On-chip high-power porous silicon lithium ion batteries with stable capacity over 10000 cycles (Presentation Recording)

Andrew S. Westover, Daniel Freudiger, Zarif Gani, Keith Share, Landon Oakes, Rachel E. Carter, Cary L. Pint

Author Affiliations +

Proceedings Volume 9552, Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII; 95520E (2015) https://doi.org/10.1117/12.2191668
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

We demonstrate the operation of a graphene-passivated on-chip porous silicon material as a high rate lithium ion battery anode with over 50x power density and 100x energy density improvement compared to identically prepared on-chip porous silicon supercapacitors. We demonstrate this Faradaic storage behavior to occur at fast charging rates (1-10 mA/cm2) where lithium locally intercalates into the nanoporous silicon, but not underlying bulk silicon material. This prevents the degradation and poor cycling performance that is commonly observed from deep storage in bulk silicon materials. As a result, this device exhibits cycling performance that exceeds 10,000 cycles with capacity above 0.1 mAh/cm2, without notable capacity fade. This work demonstrates a practical route toward high power, high energy, and long lifetime all-silicon on-chip storage systems relevant toward integration of energy storage into electronics, photovoltaics, and other silicon-based technology.

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Citation Download Citation

Andrew S. Westover, Daniel Freudiger, Zarif Gani, Keith Share, Landon Oakes, Rachel E. Carter, and Cary L. Pint "On-chip high-power porous silicon lithium ion batteries with stable capacity over 10000 cycles (Presentation Recording)", Proc. SPIE 9552, Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII, 95520E (5 October 2015); https://doi.org/10.1117/12.2191668

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KEYWORDS

Silicon

Lithium

Ions

Solar energy

Electronics

Photovoltaics

System integration

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