Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Amorphous V 2 O 5 -TeO 2 -based glass materials are good candidates for next-generation lithium-ion battery anodes. In this work, excessive loss of specific capacity in the first cycle and a low capacity retention rate have been addressed by introducing NiO/NiSe into the V 2 O 5 –TeO 2 glass system. V 5+ decreased in content from 84.4% to 37.7% and 33.7%, while V 4+ and V 3+ elevated from 15.6% to 56.5% and 60.0%, as well as from 0% to 5.8% and 6.3%, respectively. Thus, the initial specific capacity increased from 699.8 to 1048.5 mAh/g and the electrochemical impedance decreased from 648 to 242 Ω. The conductivity increased by 12.5%. Density functional theory simulations show no state density at the Fermi level before and after lithium adsorption, indicating that the system is a semiconductor with a transition barrier of 0.667 eV. This work helps to provide a new strategy for the ordered and disordered transformation and lithium storage properties.
Source: ACS Omega
Authors: Chunyi Niu, Yinzhao Rao, Xiaorui Wang, Bingbing Bu, Lejia Cao, Ziwen Zhang, Qiqi Zhuang, Jing Bai, Suoqi Zhao, Keng H. Chung, Fanhou Kong, Changjiu Li
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
OpenAlex ID: W4415852433