Enhanced Vanadium Redox Flow Battery Performance with New Amphoteric Ion Exchange Membranes
(2024) In Macromolecular Rapid Communications 45(22).- Abstract
Vanadium redox flow batteries (VRFBs) depend on the separator membrane for their efficiency and cycle life. Herein, two amphoteric ion exchange membranes are synthesized, based on sulfonic acid group-grafted poly(p-terphenyl piperidinium), for VRFBs. Using ether-free poly(p-terphenyl piperidine) (PTP) as the polymer matrix, and sodium 2-bromoethanesulphonate (ES) and 1,4-butane sultone (BS) as grafting agents, We achieve quaternization of PTP through an environmentally friendly process without alkaline catalysts. PTP-ES and PTP-BS membranes exhibit low area resistance, high H+ permeability, and significantly reduced vanadium ion permeability, leading to exceptional ion selectivity, which is 3.06 × 106 S min... (More)
Vanadium redox flow batteries (VRFBs) depend on the separator membrane for their efficiency and cycle life. Herein, two amphoteric ion exchange membranes are synthesized, based on sulfonic acid group-grafted poly(p-terphenyl piperidinium), for VRFBs. Using ether-free poly(p-terphenyl piperidine) (PTP) as the polymer matrix, and sodium 2-bromoethanesulphonate (ES) and 1,4-butane sultone (BS) as grafting agents, We achieve quaternization of PTP through an environmentally friendly process without alkaline catalysts. PTP-ES and PTP-BS membranes exhibit low area resistance, high H+ permeability, and significantly reduced vanadium ion permeability, leading to exceptional ion selectivity, which is 3.06 × 106 S min cm−3 and 4.34 × 106 S min cm−3, respectively, three orders of magnitude higher than that of Nafion115 (0.27 × 104 S min cm−3). The VRFB with PTP-BS achieves a self-discharge duration of 190 h, compared to 86 h for Nafion 115. Additionally, under current densities of 40—160 mA cm−2, PTP-BS shows coulombic efficiencies of 98.1–99.1% and energy efficiencies of 92.0–82.1%, outperforming Nafion 115. The VRFB with PTP-BS also demonstrates excellent cycle stability and discharge capacity retention over 300 cycles at 100 mA cm−2. Therefore, the amphoteric PTP-BS membrane shows remarkable performance, offering significant potential for VRFB applications.
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- author
- Yang, Jingshuai LU ; Peng, Zhen ; Tang, Weiqin ; Lv, Peiru and Wang, Qian
- organization
- publishing date
- 2024-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- amphoteric membrane, ion selectivity, poly(terphenyl piperidine, vanadium redox flow battery
- in
- Macromolecular Rapid Communications
- volume
- 45
- issue
- 22
- article number
- 2400477
- publisher
- Wiley-VCH Verlag
- external identifiers
-
- pmid:39254528
- scopus:85203536239
- ISSN
- 1022-1336
- DOI
- 10.1002/marc.202400477
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2024 Wiley-VCH GmbH.
- id
- 23e92473-8bde-4726-8c68-9602a9ceda6d
- date added to LUP
- 2024-12-09 15:40:38
- date last changed
- 2025-08-05 10:47:56
@article{23e92473-8bde-4726-8c68-9602a9ceda6d,
abstract = {{<p>Vanadium redox flow batteries (VRFBs) depend on the separator membrane for their efficiency and cycle life. Herein, two amphoteric ion exchange membranes are synthesized, based on sulfonic acid group-grafted poly(p-terphenyl piperidinium), for VRFBs. Using ether-free poly(p-terphenyl piperidine) (PTP) as the polymer matrix, and sodium 2-bromoethanesulphonate (ES) and 1,4-butane sultone (BS) as grafting agents, We achieve quaternization of PTP through an environmentally friendly process without alkaline catalysts. PTP-ES and PTP-BS membranes exhibit low area resistance, high H<sup>+</sup> permeability, and significantly reduced vanadium ion permeability, leading to exceptional ion selectivity, which is 3.06 × 10<sup>6</sup> S min cm<sup>−3</sup> and 4.34 × 10<sup>6</sup> S min cm<sup>−3</sup>, respectively, three orders of magnitude higher than that of Nafion115 (0.27 × 10<sup>4</sup> S min cm<sup>−3</sup>). The VRFB with PTP-BS achieves a self-discharge duration of 190 h, compared to 86 h for Nafion 115. Additionally, under current densities of 40—160 mA cm<sup>−2</sup>, PTP-BS shows coulombic efficiencies of 98.1–99.1% and energy efficiencies of 92.0–82.1%, outperforming Nafion 115. The VRFB with PTP-BS also demonstrates excellent cycle stability and discharge capacity retention over 300 cycles at 100 mA cm<sup>−2</sup>. Therefore, the amphoteric PTP-BS membrane shows remarkable performance, offering significant potential for VRFB applications.</p>}},
author = {{Yang, Jingshuai and Peng, Zhen and Tang, Weiqin and Lv, Peiru and Wang, Qian}},
issn = {{1022-1336}},
keywords = {{amphoteric membrane; ion selectivity; poly(terphenyl piperidine; vanadium redox flow battery}},
language = {{eng}},
number = {{22}},
publisher = {{Wiley-VCH Verlag}},
series = {{Macromolecular Rapid Communications}},
title = {{Enhanced Vanadium Redox Flow Battery Performance with New Amphoteric Ion Exchange Membranes}},
url = {{http://dx.doi.org/10.1002/marc.202400477}},
doi = {{10.1002/marc.202400477}},
volume = {{45}},
year = {{2024}},
}