Stable lithium metal anode enabled by high-dimensional lithium deposition through a functional organic substrate
Artikel i vetenskaplig tidskrift, 2020

The growth of lithium dendrites severely restricts the development of lithium metal batteries. In order to achieve the goal of dendrites-free lithium in principle, it is crucial and urgent to control nucleation and growth of lithium. Here, a functional organic layer of perylene-3, 4, 9, 10-tetracarboxydiimide-lithium (PTCDI-Li) is built on the lithium anode surface by in-situ chemical reaction of PTCDI and Li metal. PTCDI-Li, with high surface energy (-10.19 eV) and low diffusion barrier (0.89 eV), efficiently promotes disk-shaped high-dimensional nucleation by regulation of lithium ion flux upon lithium plating, leading to a dendrites-free morphology. When operating under a relatively high current density of 10 mA cm−2, the Li | Li symmetrical cells with PTCDI-Li exhibit outstanding cyclic stability for 300 hours with ultralow overpotential of 400 mV, superior to the most of the reported lithium anode. The corresponding PTCDI-Li batteries show high specific capacity and enhanced cycle life. We anticipate that this strategy of regulation of lithium deposition from one-dimensional to high-dimensional opens a new horizon in the development of dendrites-free Li anodes.

Li-S batteries

High-dimensional nucleation

Dendrites-free

Organic functional layer

Lithium metal anode

Författare

Peiyu Zhao

Xi'an Jiaotong University

Yangyang Feng

Xi'an Jiaotong University

Tongtong Li

Xi'an Jiaotong University

Bing Li

Xi'an Jiaotong University

Linlin Hu

Xi'an Jiaotong University

Kun Sun

Xi'an Jiaotong University

Chonggao Bao

Xi'an Jiaotong University

Shizhao Xiong

Chalmers, Fysik, Materialfysik

Aleksandar Matic

Chalmers, Fysik, Materialfysik

Jiangxuan Song

Xi'an Jiaotong University

Energy Storage Materials

2405-8297 (eISSN)

Vol. 33 158-163

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemiteknik

Styrkeområden

Energi

Materialvetenskap

DOI

10.1016/j.ensm.2020.08.025

Mer information

Senast uppdaterat

2020-12-21