Can chemical polishing improve the electrochemical performance of lithium metal batteries?

Herein, we demonstrate a facile chemical polishing strategy to remove the pristine film on lithium foil to simplify the surface chemistry of lithium and enable uniform lithium deposition/dissolution during cycles, which can then effectively improve the electrochemical performance of lithium metal batteries. 1. Introduction

How does polishing a lithium foil affect XPS spectra?

The Li 1 s peak of polished lithium foil shifts to lower binding energy, indicating the successful removal of the lithium components from lithium foil upon polishing (Fig. 1 d, detailed XPS spectra are shown in Fig. S2).

How to Polish thin lithium plates?

This method may work with thick lithium plates that are used in coin cell. Lithium metal with rather thickness are allowed to be removed. To polish the thin Li foil, the reaction was controlled by using a low-concentration naphthalene tetrahydrofuran solution.

What happens after polishing lithium foil?

After polishing, the rigid surface layer is successfully removed from the lithium foil (Fig. 1 g,h). Fig. 1. Preparation and characterizations of polished lithium foil. (a) Schematic of the preparing process of polished lithium foil.

What is the average CE of a cell with polished lithium foils?

In particular, the average CE of cells with polished lithium foils increases to be 94.2% during the last 100 cycles, which is higher than the previous reported systems cycling in a carbonate electrolyte electrolytes (around 85%) , demonstrating a possible transition to bulk lithium deposition/ dissolution aforementioned.

Is Electropolishing a good way to clean Zn metal?

Here, for the first time, we demonstrate a simple, effective, and non-corrosive electropolishing strategy to develop a smooth and clean Zn metal as compared with burdensome and unreliable mechanical polishing method in lab-scale research.