Generating H<sup>+</sup> in Catholyte and OH<sup>–</sup> in Anolyte: An Approach to Improve the Stability of Aqueous Zinc-Ion Batteries
Yuhang Dai, Jinghao Li, Lineng Chen, Kehan Le, Zhijun Cai, Qinyou An, Lei Zhang, Liqiang Mai
Abstract
We used bipolar membranes (BMs) as separators in aqueous zinc-ion batteries to decouple the electrolyte, which increased the H+ concentration in the catholyte and the OH– concentration in the anolyte when cycling starting. An ultra-long running time of ∼4440 h was achieved due to the significantly enhanced H+ insertion in the cathode and the formation of Znx(OTf)y(OH)2x-y·nH2O protective layers on the zinc anode.
Topics & Concepts
AnodeAqueous solutionZincChemistryCathodeElectrolyteIonInorganic chemistryElectrochemistryGalvanic anodeNuclear chemistryElectrodePhysical chemistryCathodic protectionOrganic chemistryAdvanced battery technologies researchAdvanced Battery Materials and TechnologiesPerovskite Materials and Applications