Densely Packed Li-Metal Growth on Anodeless Electrodes by Li + -Flux Control in Space-Confined Narrow Gap of Stratified Carbon Pack for High-Performance Li-Metal Batteries.

Autor: Won JH; Department of Chemistry, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul, 02707, Republic of Korea., Sim WH; School of Mechanical Engineering and Department of Smart Fab. Technology, Sungkyunkwan University, 2066 Seobu-ro, Suwon, 16419, Republic of Korea., Kim D; School of Mechanical Engineering and Department of Smart Fab. Technology, Sungkyunkwan University, 2066 Seobu-ro, Suwon, 16419, Republic of Korea., Jeong HM; School of Mechanical Engineering and Department of Smart Fab. Technology, Sungkyunkwan University, 2066 Seobu-ro, Suwon, 16419, Republic of Korea.
Jazyk: angličtina
Zdroj: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2023 Jan; Vol. 10 (3), pp. e2205328. Date of Electronic Publication: 2022 Nov 24.
DOI: 10.1002/advs.202205328
Abstrakt: Lithium (Li) is the "holy grail" for satisfying the increasing energy demand. This is because of its high theoretical capacity and low potential. Although Li is considered as a potential anode material, dendritic Li growth and the limited electrochemical properties continue to hinder its practical application. Structure-based self lithium ion (Li + ) concentrating electrodes with high capacity and uniform Li + -flux are recommended to overcome these shortcomings of Li. However, recent studies have been limited to structural perspectives. In addition, the electrokinetic principle of electrode materials remains a challenge. Herein, the space-confinement-based strategy is suggested for condensed Li + -flux control in nanoscaled slit spaces that induce the dense Li growth on an anodeless electrode by using the stratified carbon pack (SCP). The micro/mesoporous slits of the SCP concentrate the electric field, which is strengthened by the space-confined electric field focusing, resulting in the accumulation of Li + -flux in the host. The accumulated Li + in host sites enables a uniform Li deposition with high capacity at high current density stably. Furthermore, SCPs have great compatibility with LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode, representing the outstanding full cell performance with Li deposited electrode which show the high specific of 115 mAh g -1 at 4 C during 350 cycles.
(© 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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