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High Power Rechargeable magnesium/iodine Battery Chemistry

High Power Rechargeable magnesium/iodine Battery Chemistry

Huajun Tian, Tao Gao, Xiaogang Li, Xiwen Wang, Chao Luo, Xiulin Fan, Chongyin Yang, Liumin Suo, Zhaohui Ma, Weiqiang Han, Chunsheng Wang

Nat Commun. 2017 Jan 10;8:14083.

PMID: 28071666

Abstract:

Rechargeable magnesium batteries have attracted considerable attention because of their potential high energy density and low cost. However, their development has been severely hindered because of the lack of appropriate cathode materials. Here we report a rechargeable magnesium/iodine battery, in which the soluble iodine reacts with Mg2+ to form a soluble intermediate and then an insoluble final product magnesium iodide. The liquid-solid two-phase reaction pathway circumvents solid-state Mg2+ diffusion and ensures a large interfacial reaction area, leading to fast reaction kinetics and high reaction reversibility. As a result, the rechargeable magnesium/iodine battery shows a better rate capability (180 mAh g-1 at 0.5 C and 140 mAh g-1 at 1 C) and a higher energy density (∼400 Wh kg-1) than all other reported rechargeable magnesium batteries using intercalation cathodes. This study demonstrates that the liquid-solid two-phase reaction mechanism is promising in addressing the kinetic limitation of rechargeable magnesium batteries.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP10377589	Magnesium iodide		10377-58-9	Price

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