Recently, Professor Wang Pengfei's research group at the School of Electrical Engineering, Xi'an Jiaotong University, designed a low-concentration ether-based electrolyte that suppresses salt precipitation at low temperatures. This electrolyte forms a stable organic component-dominated electrode/electrolyte interface at low temperatures, facilitating the rapid transport of Na+ in cold environments. The research findings were published in "Angewandte Chemie International Edition."
Results from electrochemical tests and molecular dynamics simulations collectively demonstrate the excellent kinetic properties of this electrolyte at low temperatures. It effectively reduces unfavorable polarization and significantly increases electrochemical impedance at low temperatures. The Na0.7Li0.03Mg0.03Ni0.27Mn0.6Ti0.07O cathode and hard carbon anode exhibit high capacity retention rates of 92.5% and 93.1%, respectively, at -30°C, along with outstanding long-term cycling stability. This work systematically investigates the changes in electrolytes and interfaces at low temperatures, providing important insights for the design of electrolytes in extreme environments and the study of electrode/electrolyte interfaces.
Related paper information: https://doi.org/10.1002/anie.202403585
