Work

Ultrahigh stability of lithium batteries improved by methoxy-modified graphdiyne composite separators

Year: 2025

Type: article

Abstract: Microprous polyolefin separator membranes play a crucial role in the performance of lithium batteries, but uncontrolled lithium dendritic growth and the high electrolyte reactivity can significantly affect battery performance. This study introduces a novel separator, OMe-GDY@PP, a functional bilayer composite created by blade-coating methoxy-modified graphdiyne onto commercial polypropylene separators. The methoxy-modified graphdiyne carbon network, characterized by superior electronic and ionic conductivity, establishes a stable and heterogeneous lithium-electrolyte interface. This interface facilitates uniform lithium deposition, suppresses dendrite growth, and extends the battery’s lifespan. The OMe-GDY@PP-modified symmetric battery achieves a stable voltage platform for over 3400 h at a current density of 1 mA cm −2 , surpassing the performance of PP separator symmetric batteries by 200 %.

Source: Chemical Engineering Journal

DOI: 10.1016/j.cej.2025.161941

Authors: Jingyi He, Guilin Hu, Jing Chen, Xingzhong Wu, Yongjun Li

Institutions: Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, University of Chinese Academy of Sciences

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,830