Kinetically Accelerated Lithium Storage in High-Entropy (LiMgCoNiCuZn)O Enabled By Oxygen Vacancies.
Xuefeng LiuYingying XingKe XuHaijun ZhangMingxing GongQuanli JiaShaowei ZhangWen LeiPublished in: Small (Weinheim an der Bergstrasse, Germany) (2022)
High-entropy oxides (HEOs) are gradually becoming a new focus for lithium-ion battery (LIB) anodes due to their vast element space/adjustable electrochemical properties and unique single-phase retention ability. However, the sluggish kinetics upon long cycling limits their further generalization. Here, oxygen vacancies with targeted functionality are introduced into rock salt-type (MgCoNiCuZn)O through a wet-chemical molten salt strategy to accelerate the ion/electron transmission. Both experimental results and theoretical calculations reveal the potential improvement of lithium storage, charge transfer, and diffusion kinetics from HEO surface defects, which ultimately leads to enhanced electrochemical properties. The currently raised strategy offers a modular approach and enlightening insights for defect-induced HEO-based anodes.
Keyphrases
- solid state
- gold nanoparticles
- ionic liquid
- molecularly imprinted
- ion batteries
- density functional theory
- diabetic rats
- molecular dynamics simulations
- cancer therapy
- molecular dynamics
- electron transfer
- single cell
- high intensity
- oxidative stress
- drug induced
- drug delivery
- aqueous solution
- electron microscopy
- liquid chromatography