Suppressing lithium dendrite formation by slowing its desolvation kinetics
- 5 October 2019
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- Vol. 55 (88), 13211-13214
- https://doi.org/10.1039/c9cc07092c
Abstract
Slowing the dendrite formation process is one way to alleviate the fast capacity fade and safety issues in lithium metal battery systems. We used tetraethylene glycol dimethyl ether (TEGDME) as a complementary solvent to increase the desolvation activation energy of Li+, reduce the speed of lithium electrodeposition kinetics, and suppress dendrite formation. Density functional theory calculations combined with Raman spectroscopy indicate that a stronger coordination interaction is obtained between Li+ and TEGDME than between Li+ and 1,2-dimethoxyethane (DME) or 1,3-dioxolane (DOL). Such a strong coordination leads to a slower electrochemical reaction rate. As a result, uniform lithium electrodeposition morphology and good cycling stability of a Li|Li symmetric cell for more than 500 hours were achieved. Our approach suggests a way in which dendrite formation can be controlled by the electrochemical reaction itself.Keywords
Funding Information
- National Natural Science Foundation of China (Nos. 51521091, Nos. 51525206)
- National Basic Research Program of China (2016YFB0100100)
- Chinese Academy of Sciences (XDA22010602)
This publication has 30 references indexed in Scilit:
- Three-dimensional matrix for lithium metal anode for next-generation rechargeable batteries: Structure design and interface engineeringJournal of Energy Chemistry, 2019
- Porous LiF layer fabricated by a facile chemical method toward dendrite-free lithium metal anodeJournal of Energy Chemistry, 2019
- Before Li Ion BatteriesChemical Reviews, 2018
- Tough Gel Electrolyte Using Double Polymer Network Design for the Safe, Stable Cycling of Lithium Metal AnodeAngewandte Chemie, 2018
- An anion-immobilized composite electrolyte for dendrite-free lithium metal anodesProceedings of the National Academy of Sciences of the United States of America, 2017
- Toward Safe Lithium Metal Anode in Rechargeable Batteries: A ReviewChemical Reviews, 2017
- More Reliable Lithium‐Sulfur Batteries: Status, Solutions and ProspectsAdvanced Materials, 2017
- Electrolytes and Interphases in Li-Ion Batteries and BeyondChemical Reviews, 2014
- Superior Rechargeability and Efficiency of Lithium–Oxygen Batteries: Hierarchical Air Electrode Architecture Combined with a Soluble CatalystAngewandte Chemie, 2014
- A Reversible and Higher-Rate Li-O 2 BatteryScience, 2012