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Interfacial Polymerization-Modified Polyetherimide (PEI) Separator for Li–O2 Battery with Boosted Performance AITranslate

Jiuqing Liu; Lishun Bai; Junying He; Cheng Wang; Qihou Li; Feifei Song; Zikun Hong; Ya Chen; Fanli Zeng; Chen Cheng; Zehao Chen;
Central South University; Central South University; Central South University; Central South University; Central South University; Central South University; Central South University; Central South University; Central South University; Central South University; Central South University
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Publisher: ACS
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Abstract AITranslate

Lithium–oxygen (Li–O2) batteries, having an ultrahigh theoretical energy density (3500 Wh kg–1), have gained a lot of attention. However, its application is seriously obstructed by pivotal issues like instability of lithium metal anode, low energy efficiency, and electrolyte decomposition. Herein, a separator modification method based on interfacial polymerization (IP) was proposed by us to solve these issues. The obtained interfacial polymerization layer shows good ion-selective permeability on the surface of the polyetherimide (PEI) separator, and the ion transport of the larger EMIM+, TFSI–, and BF4– between the electrodes is greatly inhibited. Consequently, the representative P2-PEI separator presents the best cycle performance and the Li–O2 battery assembled with it can stably operate over 135 cycles, even under a current density of 0.05 mA cm–2 and a limited specific capacity of 1000 mAh g–1.

KeyWords AITranslate

Li−O2 battery separators interfacial polymerization polyetherimide polymer EMIMBF4 ionic liquid electrolyte
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.2c00718

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Citation Information:

Lithium–oxygen (Li–O2) batteries, having an ultrahigh theoretical energy density (3500 Wh kg–1), have gained a lot of attention. However, its application is seriously obstructed by pivotal issues like instability of lithium metal anode, low energy efficiency, and electrolyte decomposition. Herein, a separator modification method based on interfacial polymerization (IP) was proposed by us to solve these issues. The obtained interfacial polymerization layer shows good ion-selective permeability on the surface of the polyetherimide (PEI) separator, and the ion transport of the larger EMIM+, TFSI–, and BF4– between the electrodes is greatly inhibited. Consequently, the representative P2-PEI separator presents the best cycle performance and the Li–O2 battery assembled with it can stably operate over 135 cycles, even under a current density of 0.05 mA cm–2 and a limited specific capacity of 1000 mAh g–1.

quote

GB/T 7714-2015 [1] Jiuqing Liu, Lishun Bai, Junying He, et al. ACS Applied Polymer Materials, 2022(4). DOI:10.1021/acsapm.2c00718.
MLA [1] Jiuqing Liu, et al., ACS Applied Polymer Materials, no. 4, 2022, https://doi.org/10.1021/acsapm.2c00718.
APA [1] Jiuqing Liu, Lishun Bai, Junying He, Cheng Wang, Qihou Li, Feifei Song, Zikun Hong, Ya Chen, Fanli Zeng, Chen Cheng, & Zehao Chen. (2022). ACS Applied Polymer Materials(4). https://doi.org/10.1021/acsapm.2c00718
IEEE [1] Jiuqing Liu, Lishun Bai, Junying He, Cheng Wang, Qihou Li, Feifei Song, Zikun Hong, Ya Chen, Fanli Zeng, Chen Cheng, and Zehao Chen, ACS Applied Polymer Materials, no. 4, 2022, doi: 10.1021/acsapm.2c00718. keywords: {Li−O2 battery;separators;interfacial polymerization;polyetherimide polymer;EMIMBF4;ionic liquid electrolyte}