材料科学
离子电导率
纤维素
电解质
聚合物电解质
聚合物
纳米纤维
化学工程
离子键合
锂(药物)
电导率
高分子化学
复合材料
电极
离子
化学
有机化学
内分泌学
工程类
物理化学
医学
作者
Cristina Prado-Martínez,Preston Sutton,Isabella Mombrini,Aristotelis Kamtsikakis,Worarin Meesorn,Christoph Weder,Ullrich Steiner,Ilja Gunkel
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:11 (17): 9521-9529
被引量:4
摘要
Lithium-metal electrodes are promising for developing next-generation lithium-based batteries with high energy densities. However, their implementation is severely limited by dendritic growth during battery cycling, which eventually short-circuits the battery. Replacing conventional liquid electrolytes with solid polymer electrolytes (SPEs) can suppress dendritic growth. Unfortunately, in SPEs the high stiffness required for suppressing dendrites comes at the expense of efficient lithium-ion transport. Some polymer-based composite electrolytes, however, enable the decoupling of stiffness and ionic conductivity. This study introduces a composite SPE comprised of a relatively soft poly(ethylene oxide-co-epichlorohydrin) (EO-co-EPI) statistical copolymer with high ionic conductivity and cellulose nanofibers (CNFs), a filler with extraordinary stiffness sourced from abundant cellulose. CNF-reinforcement of EO-co-EPI increases the storage modulus up to three orders of magnitude while essentially maintaining the SPE's high ionic conductivity. The composite SPE exhibits good cycling ability and electrochemical stability, demonstrating its utility in lithium metal batteries.
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