TY - JOUR
T1 - Synergy of O2 Permeance and H2O Resistance by PIM-Enhanced PDMS Composite Membranes for “Closed-Type” Aprotic Li-Air Batteries
AU - Huang, Tong
AU - Wu, Fayun
AU - Liu, Shuang
AU - Liu, Gongping
AU - Ran, Ran
AU - Zhou, Wei
AU - Liao, Kaiming
N1 - Publisher Copyright:
© 2025 Wiley-VCH GmbH.
PY - 2025/4/9
Y1 - 2025/4/9
N2 - Aprotic Li-O2 batteries exhibit ultra-high energy density through the redox reaction of O2. However, their open-structure design makes them prone to water infiltration and electrolyte leakage. Traditionally, dense and thick oxygen-permeable membranes (OPMs) are employed to prevent H2O intrusion, but this approach limits O2 permeance and constrains charge current densities. To address the trade-off between O2 permeance and H2O resistance, a novel double-laminated film (DLF) is proposed as an OPM. This innovative design integrates a thin polydimethylsiloxane (PDMS) layer, known for its excellent H2O resistance, onto a polymer of intrinsic microporosity (PIM-1) substrate, which offers high O2 permeability. The resulting thin composite OPM (<40 µm) enables Li-air batteries to operate continuously for 90 cycles (180 h) in ambient air with a relative humidity of 50 ± 5% at 1000 mA g⁻¹, owing to the synergistic effects of the OPM's exceptional O₂ permeance (6881 Barrer, 215 GPU) and its effective mitigation of H₂O intrusion. The selective transport of O2 and H2O is facilitated by the hydrophobic apertures of the PDMS and PIM-1 layers, which exploit their kinetic differences. This work highlights the potential of high-free-volume, microporous polymers, and DLF architectures for advancing OPMs in aprotic Li-air battery applications.
AB - Aprotic Li-O2 batteries exhibit ultra-high energy density through the redox reaction of O2. However, their open-structure design makes them prone to water infiltration and electrolyte leakage. Traditionally, dense and thick oxygen-permeable membranes (OPMs) are employed to prevent H2O intrusion, but this approach limits O2 permeance and constrains charge current densities. To address the trade-off between O2 permeance and H2O resistance, a novel double-laminated film (DLF) is proposed as an OPM. This innovative design integrates a thin polydimethylsiloxane (PDMS) layer, known for its excellent H2O resistance, onto a polymer of intrinsic microporosity (PIM-1) substrate, which offers high O2 permeability. The resulting thin composite OPM (<40 µm) enables Li-air batteries to operate continuously for 90 cycles (180 h) in ambient air with a relative humidity of 50 ± 5% at 1000 mA g⁻¹, owing to the synergistic effects of the OPM's exceptional O₂ permeance (6881 Barrer, 215 GPU) and its effective mitigation of H₂O intrusion. The selective transport of O2 and H2O is facilitated by the hydrophobic apertures of the PDMS and PIM-1 layers, which exploit their kinetic differences. This work highlights the potential of high-free-volume, microporous polymers, and DLF architectures for advancing OPMs in aprotic Li-air battery applications.
KW - Li-air batteries
KW - oxygen permeable membranes
KW - polydimethylsiloxane
KW - polymer of intrinsic microporosity (PIM)
KW - water resistance
UR - http://www.scopus.com/inward/record.url?scp=105002267710&partnerID=8YFLogxK
U2 - 10.1002/smll.202412208
DO - 10.1002/smll.202412208
M3 - 文章
AN - SCOPUS:105002267710
SN - 1613-6810
VL - 21
JO - Small
JF - Small
IS - 14
M1 - 2412208
ER -