High Energy Density Aqueous Li-Ion Flow Capacitor

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• 作者：Hao Liu ; Libing Liao ; Yi-Chun Lu and Quan Li
• 刊名：Advanced Energy Materials
• 出版年：2017
• 出版时间：January 11, 2017
• 年：2017
• 卷：7
• 期：1
• 全文大小：1915K
• ISSN：1614-6840

文摘

High energy density Li-ion hybrid flow capacitors are demonstrated by employing LiMn₂O₄ and activated carbon slurry electrodes. Compared to the existing aqueous flow electrochemical capacitors, the hybrid one exhibits much higher energy densities due to the introduction of high capacity Li-insertion materials (e.g., LiMn₂O₄ in the present work) as the flowable electrode with asymmetrical cell configuration. A record energy density, i.e., 23.4 W h kg⁻¹ at a power of 50.0 W kg⁻¹ has been achieved for aqueous flow capacitors tested at static condition reported to date. A full operational Li-ion flow capacitor tested in an intermittent-flow mode has also been demonstrated. The Li-ion hybrid flow capacitor shows great promise for high-rate grid applications.