期刊
JOULE
卷 3, 期 11, 页码 2687-2702出版社
CELL PRESS
DOI: 10.1016/j.joule.2019.07.008
关键词
-
资金
- Australia-India Strategic Research Fund, Australia [AISRF 48515]
- Australian Research Council (ARC) [CE140100012]
- Australian Government
- Basque Foundation for Science, Bilbao, Spain
Polymer electrolytes are seen as key components for safe, high-energy-density all-solid-state lithium (Li) batteries, given their appropriate mechanical properties along with the absence of volatile and flammable solvents. Here, we report a class of solvent-free polymer electrolytes by using poly(diallyldimethylammonium) bis(fluorosulfonyl)imide (PDADMA FSI) and a high content of Li bis(fluorosulfonyl)imide (LiFSI) salt. A homogeneous mixture, with a Li + ion transference number of 0.56, is found at a 1:1 5 mole ratio of PDADMA FSI:LiFSI, whereas crystalline phases are observed at higher LiFSI contents. Molecular dynamics (MD) simulations indicate a co-coordination of the FSI anion with both the Li+ and the polymer backbone, and this co-coordination is maximized at 1:1.5 mole ratio, which facilitates Li+ transport. The optimized electrolyte has been demonstrated to support long-term stable Li-metal symmetrical cycling as well as Li-metal battery cycling (Li vertical bar LiFePO4 and Li vertical bar Li-1/3 Ni-1/3 Mn1/3CoO2) at elevated temperature, with areal capacity higher than 1.1 mAh cm (-2).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据