| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Configuration Optimization and Discharge Performance of Gram-scale Al-Air Batteries Without Peripheral Devices |
| YANG Yun, JIANG Tao*, LIN Zening, HONG Yang, GAO Yuan, LUO Zirong*
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| College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China |
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Abstract Aluminum-air batteries show promise for emergency and remote applications due to their high energy density and safety. However, conventional systems face miniaturization challenges and low energy density caused by peripheral devices, such as pump and electrolyte storage tank. Here, we developed a compact, peripheral-free, single-chamber battery that encapsulates the electrolyte between the electrodes. The inf-luence of peripheral devices on the overall system output performance was systematically investigated via linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) analysis, and other methods. Experimental results demonstrated that the peak power density of peripheral-free single-chamber batteries (18.05 mW/g) was approximately 7.52 times higher than that of conventional counterparts. To address electrolyte leakage in single-chamber designs, a dual-chamber configuration with the order of cathode/electrolyte/anode/electrolyte/cathode was engineered. This structural configuration achieved simultaneous doubling of the electroactive surface area and 50% reduction in interelectrode distance, which enhanced the power output to the peak density of 36.75 mW/g. Leveraging this breakthrough, the engineered gram-level dual-compartment cell configuration exhibited stable power delivery capabilities to LEDs, fans, and electric toy cars. This performance demonstrates the viability of this stationary energy storage system in powering low-wattage loads.
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Published:
Online: 2026-02-13
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Corresponding Authors:
jiangtao@nudt.edu.cn;luozirong@nudt.edu.cn
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2026, Vol. 40 
