High energy density MIM-type aluminum electrolytic capacitors based on sintered aluminum powder anodes

IF 18.9 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Energy Storage Materials Pub Date : 2025-04-14 DOI:10.1016/j.ensm.2025.104257

Yuan Guo , Shixin Wang , Xianfeng Du , Xinkuan Zang , Zhongshuai Liang , Jun Xiong , Zhuo Li , Ruizhi Wang , Xiaotao Sun

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引用次数: 0

Abstract

Building high-energy density metal-insulator-metal type aluminum electrolytic capacitors (MIM-AECs) will open up new chapters for high-energy pulsed applications. Here, a high-energy density MIM-AECs were fabricated based on additively manufactured aluminum powder (Al-P) anodes. Due to the larger specific surface area of Al-P, the capacity density is increased by 11 % compared to conventional etched Al anodes. Meanwhile, a SnO₂/AlPO₄/AAO interface increases the Sn diffusion barrier and inhibits its diffusion into AAO, ensuring a high breakdown field strength (5.4 MV/cm). Moreover, the interface reduces carrier mobility and mitigates carrier acceleration, preventing local breakdown in device. Consequently, an exciting voltage (380 V) far exceeding that of conventional solid-state AECs capacitors is obtained, while an energy density (11.6 µWh/cm²) is ten times higher than that of reported MIM nanocapacitors. Strikingly, the capacitors exhibit a wide temperature window (-60 °C∼332 °C), strong humidity resistance (100 % RH) and high frequency response (300 kHz), far superior to commercial AECs.

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来源期刊

Energy Storage Materials Materials Science-General Materials Science

CiteScore

33.00

自引率

5.90%

发文量

652

审稿时长

27 days

期刊介绍： Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field. Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy. Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.