Sha Luo, Haotian Chen, Jiaqi Wang, Yu Feng, Bao Zhang, Wei Sun
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引用次数: 0
Abstract
Near-neutral rechargeable zinc-air batteries (ZABs) offer high energy density, safety, and economic benefits but suffer from higher polarization due to low-conductivity discharge products. Herein, we demonstrate an inner surface ion confinement effect within hydrophilic porous carbon to accelerate cathodic reaction kinetics of neutral ZABs. Operando electrochemical pH and in-situ XRD measurements reveal that microporous structure can temporarily store intermediate OH-, shifting the reaction pathway to a more efficient electrolyte mechanism, similar to high-performance aprotic Li-O2 batteries. This reduces basic zinc salt precipitation and ORR/OER overpotential, boosting energy efficiency from 46.0% to 74.5% at 0.1 mA cm-2 and 2 mAh cm-2. The resulting 10 Ah pouch cell and flexible belt-shaped cell offer scalable solutions for neutral zinc-air batteries across various applications, opening new avenues for high-performance metal-air batteries.
期刊介绍：
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.
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