Averting H⁺-Mediated Charge Storage Chemistry Stabilizes the High Output Voltage of LiMn₂O₄-Based Aqueous Battery.

ABSTRACT: H⁺ co-intercalation chemistry of the cathode is perceived to have damaging consequences on the low-rate and long-term cycling of aqueous zinc batteries, which is a critical hindrance to their promise for stationary storage applications. Herein, the thermodynamically competitive H⁺ storage chemistry of an attractive high-voltage cathode LiMn₂O₄ is revealed by employing operando and ex-situ analytical techniques together with density functional theory-based calculations. The H⁺ electrochemistry leads to the previously unforeseen voltage decay with cycling, impacting the available energy density, particularly at lower currents. Based on an in-depth investigation of the effect of the Li⁺ to Zn²⁺ ratio in the electroly

SUBMITTER: Bhadra A 

PROVIDER: S-EPMC11671848 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature