Polyaniline derivatized anion exchange membrane for acid recovery

Nagarale, Rajaram K.; Bavdane, Priyanka P.; Sreenath, Sooraj; Pawar, Chetan M.; Dave, Vidhiben; Satpati, Ashis Kumar

doi:10.1007/s10965-022-03151-x

Cited by 5 publications

(3 citation statements)

References 64 publications

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“…The peak at around 1250 cm –1 is attributed to the C–N stretching. The presence of peaks at approximately 841 and 1100 cm –1 is ascribed to C–H in-plane and C–H out-of-plane deformation . The surface and bulk morphologies of the PANI-Si composite were examined microscopically.…”

Section: Resultsmentioning

confidence: 99%

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Robust Polyaniline-silica@polypropylene for High-Performance, High-Capacity Retention All-Vanadium Redox Flow Battery

P. S.,

Sreenath,

Ash

et al. 2024

ACS Appl. Energy Mater.

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The development of high-performance membranes to address the issue of vanadium ion crossover in vanadium redox flow batteries (VRFB) is a significant area of focus. Current commercial perfluorinated membranes suffer from economic impracticality, poor ion selectivity, and electrolyte leakage. In this report, we present a composite membrane called PANI-Si@PP, which exhibits exceptional selectivity for protons over vanadium ions due to Donnan exclusion by the positively charged polyaniline backbone and the presence of well-defined proton conductive channels. To begin, we successfully synthesized and characterized a composite of polyaniline and silica (PANI-Si). Subsequently, we coated a porous polypropylene (PP) film with the PANI-Si composite using the phase inversion technique followed by acid functionalization. We assessed the surface characteristics and extent of pore filling through microscopic analysis and water flux measurements. The resulting membrane displayed excellent electrochemical and physicochemical properties. In a single-cell commercial VRFB, the PANI-Si@PP membrane achieved a Coulombic efficiency and energy efficiency of approximately ∼99 and ∼70%, respectively, over 300 cycles at a current density of 200 mA cm −2 , while retaining a high capacity of ∼70%. Additionally, the membrane exhibited a peak power density of 322 mW cm −2 at a current density of 350 mA cm −2 . This work highlights that the synergy of effective material selection and proper fabrication techniques is a successful approach to develop cutting-edge separators for battery applications.

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Section: Resultsmentioning

confidence: 99%

“…The presence of peaks at approximately 841 and 1100 cm −1 is ascribed to C−H in-plane and C−H out-of-plane deformation. 35 The surface and bulk morphologies of the PANI-Si composite were examined microscopically. SEM images of the composite (Figure 2b,c) reveal the uniform coating of the PANI over a lamellar silica.…”

Section: Pani-si Compositementioning

confidence: 99%

Robust Polyaniline-silica@polypropylene for High-Performance, High-Capacity Retention All-Vanadium Redox Flow Battery

P. S.,

Sreenath,

Ash

et al. 2024

ACS Appl. Energy Mater.

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“…(%) IEC (mmol/g) t a (−) U d,d (L/m 2 .hr) S Ref. QPECH-PAN (QP/A-06) 133 a 79.5 ± 0.31 60.91 1.76 0.489 31.96–42.86 (37.80 for Fe 2+ ) 121.0–126.8 Present Work PECH-C 77.0 79.2 ± 0.90 53.5 ± 0.20 1.88 ± 0.01 – – – [ 44 ] P(DMAM-co-DVB) 123 – 5.62 0.34 – 9.00 36–61 [ 90 ] PVA/QPECH 92–118 – 82.35–158.54 0.64–1.76 – 11.0–30.0 24.79–42.24 [ 76 ] PA-NMP – – 41.02 2.3 0.92 37.0 (6.0 for Fe 2+ ) 103.00 [ 91 ] QPPO/PVA 163 – 71.9 1.59 – 30.06 43.8 …”

Section: Resultsmentioning

confidence: 99%