Anchoring Artificial Solid Electrolyte Interphase Layer on 3D Current Collector for High-Performance Lithium Anode.

Anchoring Artificial Solid Electrolyte Interphase Layer on 3D Current Collector for High-Performance Lithium Anode.
Angew Chem Int Ed Engl. 2019 Jan 02;:
Authors: Wang Y, Li P, Dong X, Li C, Liu J, Liu Y, Feng W, Wang C, Xia Y
Abstract
The application of Li anode is hindered by the dendrite growth and side reactions between Li and electrolyte, despite its high capacity and low potential. Herein, we demonstrate a simple approach for this challenge. In our strategy, the garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO) based artificial solid electrolyte interphase (SEI) is anchored on Cu foam by sintering the Cu foam coated with LLZTO particles. The heat-treatment leads to the interdiffusion of Cu and Ta2O5 at Cu/LLZTO interface, through which LLZTO layer is fixed on Cu foam. 3D structure lowers the current density, and meanwhile the SEI reduces the contact of Li and electrolyte. Furthermore, the anchoring construction can endure Li-deposition-induced volume change. Therefore, LLZTO-modified Cu foam shows much improved Li plating/stripping performance, including long lifespan (2400 hours), high rate (maximum current density of 20 mA cm-2), high areal capacity (8 mA h cm-2 for 100 cycles) and high efficiency (over 98%).
PMID: 30600874 [PubMed - as supplied by publisher]

Source: Angewandte Chemie - January 2, 2019 Category: Chemistry Authors: Wang Y, Li P, Dong X, Li C, Liu J, Liu Y, Feng W, Wang C, Xia Y Tags: Angew Chem Int Ed Engl Source Type: research