Dual-Functional Stacked Polymer Fibers for Stable Lithium Metal Batteries in Carbonate-Based Electrolytes

被引：14

作者：

Han, Dong-Yeob ^{[1
]}

Song, Gyujin ^{[1
,2
]}

Kim, Sungho ^{[1
]}

Park, Soojin ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem, Pohang 37673, South Korea

[2] Res Inst Ind Sci & Technol, Secondary Battery Mat Res Lab, Pohang 37673, South Korea

来源：

SMALL STRUCTURES | 2022年 / 3卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

3D hosts; conventional carbonate-based electrolytes; dual-functional stacked polymer frameworks; lithium metal anodes; stress relaxation; HIGH-ENERGY; ANODE; LIQUID; MATS;

D O I：

10.1002/sstr.202200120

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lithium (Li) metal has long been thought to be an ideal anode material for high-energy-density Li metal batteries (LMBs). Nonetheless, a variety of safety risks and short cycle life due to uncontrollable Li dendrite growth limit its practical application. Here, a novel polymer-based 3D host composed of stacked polymer fibers (SPF) is purposefully designed using a simple electrospinning method to achieve dual-functional properties that endow bottom-up Li filling and morphologically regulate Li metal deposition over the host structure. As a result, the SPF allows for uniform Li-ion flux in the electrode, leading to densely packed Li deposition and further stable cycling in conventional carbonate-based electrolytes. Besides, a full cell paired with LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode results in a high-energy-density battery with a low negative/positive capacity ratio and a wide operating temperature range. This work presents a rational design for improving the stability and safety of Li metal anodes in conventional carbonate-based electrolytes for advanced LMBs.

引用

页数：9

共 51 条

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