Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery

doi:10.1016/j.jechem.2018.04.008

能源化学(英文) ›› 2018, Vol. 27 ›› Issue (5): 1362-1368.DOI: 10.1016/j.jechem.2018.04.008

Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery

Feng Pan^a, Jing Yang^a, Chuankun Jia^a, Hong Li^b, Qing Wang^a

a Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117575, Singapore;
b Key Laboratory for Renewable Energy, Institute of Physics, Chinese Academy of Sciences, Beijing 10080, China

收稿日期:2018-01-22 修回日期:2018-04-12 出版日期:2018-09-15 发布日期:2018-09-15
通讯作者: Qing Wang,E-mail address:qing.wang@nus.edu.sg
基金资助:
We acknowledge financial support by the Energy Market Authority, Singapore under its Energy Innovation Research Programme-Energy Storage (NRF2015EWT-EIRP002).

Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery

Feng Pan^a, Jing Yang^a, Chuankun Jia^a, Hong Li^b, Qing Wang^a

a Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117575, Singapore;
b Key Laboratory for Renewable Energy, Institute of Physics, Chinese Academy of Sciences, Beijing 10080, China

Received:2018-01-22 Revised:2018-04-12 Online:2018-09-15 Published:2018-09-15
Contact: Qing Wang,E-mail address:qing.wang@nus.edu.sg
Supported by:
We acknowledge financial support by the Energy Market Authority, Singapore under its Energy Innovation Research Programme-Energy Storage (NRF2015EWT-EIRP002).

摘要/Abstract

摘要： Non-aqueous redox flow batteries, because of larger operating voltage, have attracted considerable attention for high-density energy storage applications. However, the study of the anolyte is rather limited compared with the catholyte due to the labile properties of redox mediators at low potentials. Here, we report a new strategy that exploits high concentration organic lithium metal solution as a robust and energetic anolyte. The solution formed by dissolving metallic lithium with biphenyl (BP) in tetraethylene glycol dimethyl ether (TEGDME) presents a redox potential of 0.39 V versus Li/Li⁺, and a concentration up to 2 M. When coupled with a redox-targeted LiFePO₄ catholyte system, the constructed redox flow lithium battery full cell delivers a cell voltage of 3.0 V and presents reasonably good cycling performance.

关键词: Redox flow battery, Anolyte, Charge transfer complex, Lithium metal

Abstract: Non-aqueous redox flow batteries, because of larger operating voltage, have attracted considerable attention for high-density energy storage applications. However, the study of the anolyte is rather limited compared with the catholyte due to the labile properties of redox mediators at low potentials. Here, we report a new strategy that exploits high concentration organic lithium metal solution as a robust and energetic anolyte. The solution formed by dissolving metallic lithium with biphenyl (BP) in tetraethylene glycol dimethyl ether (TEGDME) presents a redox potential of 0.39 V versus Li/Li⁺, and a concentration up to 2 M. When coupled with a redox-targeted LiFePO₄ catholyte system, the constructed redox flow lithium battery full cell delivers a cell voltage of 3.0 V and presents reasonably good cycling performance.

Key words: Redox flow battery, Anolyte, Charge transfer complex, Lithium metal

Feng Pan, Jing Yang, Chuankun Jia, Hong Li, Qing Wang. Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery[J]. 能源化学(英文), 2018, 27(5): 1362-1368.

Feng Pan, Jing Yang, Chuankun Jia, Hong Li, Qing Wang. Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery[J]. Journal of Energy Chemistry, 2018, 27(5): 1362-1368.

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Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery

Biphenyl-lithium-TEGDME solution as anolyte for high energy density non-aqueous redox flow lithium battery

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