Janus waterproof/water-absorbent membrane for lithium-air batteries in humid environments

IF 8.1 2区 工程技术 Q1 CHEMISTRY, PHYSICAL Journal of Power Sources Pub Date : 2025-03-17 DOI:10.1016/j.jpowsour.2025.236795
Meng Li , Jiaxin Wu , Meifen Wu , Zhaoyin Wen
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Abstract

The ambient humidity poses significant challenges to the practical application of lithium-air batteries. Its intrusion not only seriously corrodes the lithium anode, causing active lithium loss, but also triggers irreversible evolution of discharge products, leading to accumulation of by-products. To address these issues, we have pioneered the design of Janus waterproof/water-absorbent membranes to suppress humidity infiltration. Specifically, a dense polychlorotrifluoroethylene (PCTFE) film with low surface energy is selected as the outer waterproof layer to initially reduce the gas humidity. Then, a porous moisture-sensitive 3A molecular sieve layer is applied as the inner water-absorbent layer to further dehumidify the airflow to obtain a relatively dry environment. Owing to this innovative design, the humidity infiltration is effectively curbed. The lithium anode still exhibits metallic luster with no corrosion spots after cycling for 50 h in 60 % RH air. The discharge product, primarily composed of film-like Li2O2, can also be reversibly decomposed. Consequently, the lithium-air battery with Janus membranes can stably cycle for 350 h under hostile condition (60 % RH), about 5 times longer than unprotected battery. We hope this work can provide some inspirations for future design of oxygen-selective membranes.

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来源期刊
Journal of Power Sources
Journal of Power Sources 工程技术-电化学
CiteScore
16.40
自引率
6.50%
发文量
1249
审稿时长
36 days
期刊介绍: The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells. Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include: • Portable electronics • Electric and Hybrid Electric Vehicles • Uninterruptible Power Supply (UPS) systems • Storage of renewable energy • Satellites and deep space probes • Boats and ships, drones and aircrafts • Wearable energy storage systems
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