High-Capacity Aqueous Potassium-Ion Batteries for Large-Scale Energy Storage.

Su, Dawei; McDonagh, Andrew; Qiao, Shi-Zhang; Wang, Guoxiu · Adv Mater · 2017

basic_science · Level V

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Abstract

A potassium iron (II) hexacyanoferrate nanocube cathode material is reported, which operates with an aqueous electrolyte to deliver exceptionally high capacities (up to 120 mA h g<sup>-1</sup> ). The cathode material exhibits excellent structural integrity, leading to fast kinetics and highly reversible properties. All of the battery materials are safe, inexpensive, and provide superior high-rate, long-cycle-life electrochemical performance.