A high-specific-energy magnesium/water battery for full-depth ocean application. (7th September 2017)

• Record Type: Journal Article
• Authors: Liu, Qianfeng; Yan, Zhao; Wang, Erdong; Wang, Suli; Sun, Gongquan
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 36(2017)
• Page Start: 23045
• Page End: 23053
• Publication Date: 2017-09-07
• Subjects: Magnesium/water battery -- Hydrogen evolution reaction -- Underwater application -- High pressure -- Magnesium alloy; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.07.157
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, a high-specific-energy magnesium/water battery (Mg/H2 O battery) combining Mg oxidation with hydrogen evolution reaction (HER) is developed for full-depth ocean application. With the optimized platinum loading associated with moderate Ni(OH)2 on nickel foam, the performance can be increased obviously. Coupled with AZ91 Mg alloy anode, the specific energy of Mg/H2 O battery reaches a dramatic value of 1003 W h kg −1 . Moreover, ultrahigh pressure of 1100 bar in the deep-sea simulated condition brings negligible effects on the performance of battery and electrodes. The influence of low temperature can be reduced to an acceptable level under the application at low discharge current density. Stable discharge of the battery for 100 days is also obtained. This work provides a new idea to supply power source with high specific energy, excellent environment adaptability, good safety and low cost for underwater application. Graphical abstract: Highlights: Hydrogen evolution is designed to be the battery cathodic reaction. The specific energy of Mg/H2 O battery reaches 1003 W h kg −1 . The Mg/H2 O battery can work well under the pressure of 1100 bar. Steady discharge of 100 days is achieved in the Mg/H2 O battery.