An ultrafast rechargeable aluminium-ion battery

Meng Chang Lin, Ming Gong, Bingan Lu, Yingpeng Wu, Di Yan Wang, Mingyun Guan, Michael Angell, Changxin Chen, Jiang Yang, Bing Joe Hwang, Hongjie Dai

研究成果: 雜誌貢獻文章同行評審

1046 引文 斯高帕斯(Scopus)

摘要

The development of new rechargeable battery systems could fuel various energy applications, from personal electronics to grid storage. Rechargeable aluminium-based batteries offer the possibilities of low cost and low flammability, together with three-electron-redox properties leading to high capacity. However, research efforts over the past 30 years have encountered numerous problems, such as cathode material disintegration, low cell discharge voltage (about 0.55 volts; ref. 5), capacitive behaviour without discharge voltage plateaus (1.1-0.2 volts or 1.8-0.8 volts) and insufficient cycle life (less than 100 cycles) with rapid capacity decay (by 26-85 per cent over 100 cycles). Here we present a rechargeable aluminium battery with high-rate capability that uses an aluminium metal anode and a three-dimensional graphitic-foam cathode. The battery operates through the electrochemical deposition and dissolution of aluminium at the anode, and intercalation/de-intercalation of chloroaluminate anions in the graphite, using a non-flammable ionic liquid electrolyte. The cell exhibits well-defined discharge voltage plateaus near 2 volts, a specific capacity of about 70 mA h g -1 and a Coulombic efficiency of approximately 98 per cent. The cathode was found to enable fast anion diffusion and intercalation, affording charging times of around one minute with a current density of ∼4,000 mA g -1 (equivalent to ∼3,000 W kg -1), and to withstand more than 7,500 cycles without capacity decay.
原文英語
頁(從 - 到)325-328
頁數4
期刊Nature
520
發行號7547
DOIs
出版狀態已發佈 - 4月 15 2015
對外發佈

ASJC Scopus subject areas

  • 多學科

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