Authors

Abstract

The electrochemical conversion reaction, usually featured by multiple redoxprocesses and high specific capacity, holds great promise in developing high energyrechargeable battery technologies. However, the complete structuralchange accompanied by spontaneous atomic migration and volume variationduring the charge/discharge cycle leads to electrode disintegration andperformance degradation, therefore severely restricting the application ofconventional conversion-type electrodes. Herein, latticed-confined conversionchemistry is proposed, where the intercalation-like redox behavior isrealized on the electrode with a conversion-like high capacity. By delicatelyformulating the high-entropy compounds, the pristine crystal structure canbe preserved by the inert lattice framework, thus enabling an ultra-high initialCoulombic efficiency of 92.5% and a long cycling lifespan over a thousandcycles after the quasistatic chargedischarge cycle. This lattice-confinedconversion chemistry unfolds a ubiquitous insight into the localized redoxreaction and sheds light on developing high-performance electrodes towardnext-generation high-energy rechargeable batteries.