Electrochemical behavior of Li-powder anode in high Li capacity used

Shin Kook Kong; Bok Ki Kim; Woo Young Yoon

doi:10.1149/2.062209jes

Electrochemical behavior of Li-powder anode in high Li capacity used

Shin Kook Kong, Bok Ki Kim, Woo Young Yoon

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

The prevention of Li dendrite growth in Li-metal secondary cells is investigated using high-Li-content electrodes. Li powder is formed using droplet emulsions, and the powder is then used to fabricate porous Li-powder electrodes that are tested against Li-foil electrodes. Scanning electron microscopy results show that dendrites form in a Li-foil cell when the cell is charged and discharged to 25% of the theoretical Li capacity (965 mAhg^-1) at 1/3 C-rate (5mAcm^-2). This dendrite formation causes cell failure after 10 cycles. No dendrites are observed in the Li-powder cell tested for 250 cycles. Li-powder anodes can be used directly in high-capacity cells such as Li-air or Li-S cells.

Original language	English
Pages (from-to)	A1551-A1553
Journal	Journal of the Electrochemical Society
Volume	159
Issue number	9
DOIs	https://doi.org/10.1149/2.062209jes
Publication status	Published - 2012

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/2.062209jes

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abstract = "The prevention of Li dendrite growth in Li-metal secondary cells is investigated using high-Li-content electrodes. Li powder is formed using droplet emulsions, and the powder is then used to fabricate porous Li-powder electrodes that are tested against Li-foil electrodes. Scanning electron microscopy results show that dendrites form in a Li-foil cell when the cell is charged and discharged to 25% of the theoretical Li capacity (965 mAhg-1) at 1/3 C-rate (5mAcm-2). This dendrite formation causes cell failure after 10 cycles. No dendrites are observed in the Li-powder cell tested for 250 cycles. Li-powder anodes can be used directly in high-capacity cells such as Li-air or Li-S cells.",

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AU - Kong, Shin Kook

AU - Kim, Bok Ki

AU - Yoon, Woo Young

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AB - The prevention of Li dendrite growth in Li-metal secondary cells is investigated using high-Li-content electrodes. Li powder is formed using droplet emulsions, and the powder is then used to fabricate porous Li-powder electrodes that are tested against Li-foil electrodes. Scanning electron microscopy results show that dendrites form in a Li-foil cell when the cell is charged and discharged to 25% of the theoretical Li capacity (965 mAhg-1) at 1/3 C-rate (5mAcm-2). This dendrite formation causes cell failure after 10 cycles. No dendrites are observed in the Li-powder cell tested for 250 cycles. Li-powder anodes can be used directly in high-capacity cells such as Li-air or Li-S cells.

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Electrochemical behavior of Li-powder anode in high Li capacity used

Abstract

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