Physicochemically Interlocked Selenium for High Performing Aqueous Zinc–Selenium Batteries

• DOI: 10.1002/adfm.202410225
• Publication Date: 2024-07-30T11:03:03Z
• Authors: Apurva Anjan; Manmatha Mahato; Kevin Bhimani; Anoop K. Kushwaha; Varad Mahajani; Hyunjoon Yoo; Reena A. Panchal; Rohit M. Manoj; Jawon Ha; Saroj K. Nayak; Pawel Keblinkski; Il‐Kwon Oh; Nikhil Koratkar
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract A conversion‐chemistry‐based zinc–selenium aqueous battery is reported that delivers high specific capacity, good rate capability, and excellent cycle life. In this work, an electronically conjugated covalent triazine framework used to physicochemically lock selenium (Se 8 ) clusters. As a control sample, the traditional melt‐diffusion approach physically Se . While melt‐diffused cathode exhibited precipitous drop in capacity with cycling, locked can be cycled stable manner delivered of ≈600 mAh g −1 retention ≈70% after 1000 continuous charge/discharge steps. Ab initio density functional theory calculations various structural morphological characterizations indicate superiority stems from its ability suppress polyselenide shuttle phenomenon thus prevent loss active material during cycling. This work opens door toward development conversion chemistries for performing, non‐flammable, low‐cost zinc‐based rechargeable batteries.