A Sustainable Solid Electrolyte Interphase for High‐Energy‐Density Lithium Metal Batteries Under Practical Conditions
- 22 November 2019
- journal article
- research article
- Published by Wiley in Angewandte Chemie
- Vol. 59 (8), 3252-3257
- https://doi.org/10.1002/anie.201911724
Abstract
Secondary lithium metal batteries afford great promises for future energy storage applications. However, high‐energy‐density Li metal batteries suffer from short lifespan under practical conditions including limited lithium, high cathode loading, and lean electrolyte due to the absence of appropriate solid electrolyte interphase (SEI). Herein, a sustainable SEI was designed rationally by combining fluorinated co‐solvents with sustained‐release additives in response to challenges from practical conditions. The intrinsically uniform SEI and the constant supplements of building blocks of SEI jointly afford to sustainable SEI. Particularly, specific spatial distributions and abundant heterogeneous grain boundaries of LiF, LiNxOy, and Li2O in SEI effectively regulate uniformity of Li deposition, becoming the foundation of sustainable SEI. In a lithium metal battery with ultrathin Li anode (33 μm), high loading LiNi0.5Co0.2Mn0.3O2 cathode (4.4 mAh cm−2), and lean electrolyte (4.4 g Ah−1), 83% of initial capacity retains after 150 cycles with sustainable SEI compared to 4 cycles with pristine SEI. Furthermore, a pouch cell (3.5 Ah) demonstrated a specific energy of 340 Wh kg−1 for 60 cycles with lean electrolyte (2.3 g Ah−1) based on sustainable SEI. This work affords a fresh guidance to the design principles of SEI in practical Li metal batteries.Keywords
Funding Information
- National Natural Science Foundation of China (21676160, 21825501, 21805161, and U1801257)
- National Basic Research Program of China (2016YFA0202500 and 2015CB932500)
This publication has 65 references indexed in Scilit:
- Lithium metal anodes for rechargeable batteriesEnergy & Environmental Science, 2013
- Anionic Effects on Solvate Ionic Liquid Electrolytes in Rechargeable Lithium–Sulfur BatteriesThe Journal of Physical Chemistry C, 2013
- Effect of Fluoroethylene Carbonate on Electrochemical Performances of Lithium Electrodes and Lithium-Sulfur BatteriesJournal of the Electrochemical Society, 2013
- Properties of surface film on lithium anode with LiNO3 as lithium salt in electrolyte solution for lithium–sulfur batteriesElectrochimica Acta, 2012
- Role of LiNO3 in rechargeable lithium/sulfur batteryElectrochimica Acta, 2012
- A review of the features and analyses of the solid electrolyte interphase in Li-ion batteriesElectrochimica Acta, 2010
- On the Surface Chemical Aspects of Very High Energy Density, Rechargeable Li–Sulfur BatteriesJournal of the Electrochemical Society, 2009
- A review on electrolyte additives for lithium-ion batteriesJournal of Power Sources, 2006
- Design of electrolyte solutions for Li and Li-ion batteries: a reviewElectrochimica Acta, 2004
- A short review of failure mechanisms of lithium metal and lithiated graphite anodes in liquid electrolyte solutionsSolid State Ionics, 2002