MEG actualized by high-valent metal carrier transport. (November 2019)

• Record Type: Journal Article
• Authors: Chen, Nan; Liu, Qianwen; Liu, Chao; Zhang, Guofeng; Jing, Jing; Shao, Changxiang; Han, Yuyang; Qu, Liangti
• Is Part Of: Nano energy. Volume 65(2019)
• Publication Date: 2019-11
• Subjects: MEG -- Gradient-doping of ions -- High-valent metal carrier -- Charge separation -- Self-powered; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2019.104047
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Moist-electric (ME) is a promising energy that generates electricity from the air by absorbing the gaseous or vaporous water molecules that are ubiquitous in the atmosphere. Even so, all the moisture-generated carriers in the ME generator (MEG) are monovalent ions, which severely limits the diversification of ME materials as well as the further improvement and application of ME. We creatively designed the concentration gradient of high-valent metal cation carriers containing Mg (II) and Al (III) ions in one-dimensional conductive polymer nanowires and applied them to MEG. High-valent metal cation carriers have significant advantages of high ME performance based on two- and three-electron transfer property compared to monovalent ion carriers. Under the stimulation of moisture, Mg MEG achieved a high energy density of 20.8 mWcm −3 in a test circuit with a load resistance, while Al MEG produced a new record of energy density approaching 40 mWcm −3 in MEG research. By integrating Mg MEGs, the manufacture of self-powered intelligent monitoring devices that use human respiratory is developed, which is expected to be applied in wearable energy devices. This work provides insight for the design of the innovative MEG and opens up a pioneering avenue for future energy conversion and storage system. Graphical abstract: Two kinds of MEGs based on high-valent metal carrier transport.Image 1 Highlights: A concentration gradient of Mg(II) or Al(III) ions is designed in a 1D conductive polymer nanowire and applied to MEG. High-valent metal cation carriers in MEG have merits of high capacity based on two- and three-electron transfer property. By integrating Mg MEGs, we realized the manufacture of self-powered intelligent devices that use human respiratory. This work provides a new insight for the innovative design of MEG and opens a pioneering avenue for future energy device.