High Li⁺ Coordination Entropy Reducing the Interaction between Li⁺ and Polymer Chains to Improve Li⁺ Transport for Solid‐State Lithium Metal Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

Abstract High ionic conductivity and Li + transference number are crucial for ensuring the high safety energy density of solid‐state batteries, particularly those using lithium metal anodes (LMAs). However, performance current polymer electrolytes in these areas remains suboptimal, primarily due to insufficient transport properties hindered by strong coordination between ions chains. In this work, entropy is modulated through four types anions (TFSI − , DFOB BF 4 FSI ) reduce strength chains, thereby lowering barrier transport. Additionally, promote formation a uniform F‐ B‐rich solid electrolyte interphase on LMA surface. As result, fabricated with (HESPE) exhibits 0.238 mS cm −1 0.707 at room temperature. The assembled Li/HESPE/LiFePO batteries demonstrate improved plating/stripping behavior present stable cycling 1000 cycles without short circuit 1.5 C. high‐entropy strategy presents promising approach design industrial application enhanced stability safety.

Language: Английский

Design of ultrafast lithium ion channel for solid-state lithium metal batteries by in-situ polymerization induced phase separation

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162810 - 162810

Published: April 1, 2025

Language: Английский