Iodine Redox Chemistry in Rechargeable Batteries

Abstract

Figure 5. a) Schematic illustration of ap roposeda queous polysulfide/ iodide redox flow battery.b)Cyclic voltammograms of 5mm K 2 S 2 /0.5 m KCl solution (blue) and a5m m KI/0.5 m KCl solution (red) at 5mVs À1 on agold electrode. Reproducedfrom Ref. [22h] with permission.

A Structural Perspective on Prussian Blue Analogues for Aqueous Zinc‐Ion Batteries

“…[9,10] To date, the development of cathode materials for AZIBs mainly focused on manganese-and vanadium oxides, Prussian Blue Analogues (PBAs), organic and polyanion compounds, [11,12] as well as conversion type halogens. [13][14][15] Manganese-based materials, especially MnO 2 , which has been used in primary and secondary batteries for years, are a very attracting class of materials because of their low cost, environmental-friendliness, and high theoretical capacity (~617 mAh g À 1 with Mn 4 + /Mn 2 + redox couple for 1 mol Zn 2 + storage). [12,16] The basic local structure of MnO 2 is an octahedral unit composed of six oxygen atoms and one manganese atom.…”

Encapsulation of Iodine in Nitrogen-Containing Porous Carbon Plate Arrays on Carbon Fiber Cloth as a Freestanding Cathode for Lithium-Iodine Batteries

“…Among various rechargeable batteries, lithium-ion batteries (LIBs) dominate the market for many years. , However, LIBs have reached their performance limitation. Advanced battery systems based on new electrochemistry are under development for enhancing battery performance and lowering costs. , Among various candidates, rechargeable lithium-iodine (Li-I 2 ) batteries with iodine as a cathode are promising owing to their high theoretical energy density and cost-effectiveness . However, low conductivity of iodine leads to the poor rate capability in Li-I 2 batteries .…”

“…3,4 Among various candidates, rechargeable lithium-iodine (Li-I 2 ) batteries with iodine as a cathode are promising owing to their high theoretical energy density and cost-effectiveness. 5 However, low conductivity of iodine leads to the poor rate capability in Li-I 2 batteries. 6 In addition, the poor stability and easy dissolution in organic electrolytes of iodine induce the shuttle effect of polyiodide species, leading to fast capacity decay and low Coulombic efficiency during charge/discharge cycling.…”