Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 24, Pages 27873-27881Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c05098
Keywords
Li-metal batteries; electrolyte designs; weakly solvating electrolytes; siloxane-based electrolytes; solvation structures; anion-dcrived solid electrolyte interphases
Funding
- National Natural Science Foundation of China [21771018, 21875004]
- Natural Science Foundation of Beijing [2192018]
- National Natural Science Foundation of China-Regional Innovation Joint Exploration Fund [U19A2019]
- PULEAD Technology Industry Co. Ltd.
- Beijing University of Chemical Technology [buctrc201901]
- Fundamental Research Program of Shanxi Province [202103021222006]
Ask authors/readers for more resources
This research proposes a siloxane-based weakly solvating electrolyte (SiBE) that can regulate the electrolyte/electrode interface (SEI) of Li-metal batteries, leading to dendrite-free Li deposition and long cycle stability.
The rational electrolyte design with weak solvation is regarded as an effective way to regulate the electrolyte/electrode interface (SEI) that profoundly Aoon affects the performance of Li-metal batteries. Herein, we propose a newly developed siloxane-based weakly solvating electrolyte (SiBE) with contact ion pairs (CIPs) or aggregates (AGGs) dominating the solution structure, which enables the dendrite-free Li deposition and long cycle stability of Li-metal batteries. By altering the combination of Li salts, the SiBE leads to the formation of an inorganic anion-derived solid electrolyte interphase, which is highly stable and Lr-conductive. Based on SiBE, the Li parallel to LiFePO4 (LFP) full cell can stably cycle for 1000 cycles at a 2C rate with a capacity retention of 76.9%. Even with a limited Li+-metal anode, it can maintain a capacity retention of 80% after 110 cycles with a high average Coulombic efficiency of 99.8%. This work reveals that siloxane can be a promising solvent to obtain weakly solvating electrolytes, which opens a new avenue for SEI composition regulation of Li-metal batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available