Scalable Fabrication of Carbon-Networked Size-Tunable V2O3for Lithium Storage

Scalable Fabrication of Carbon-Networked Size-Tunable V2O3for Lithium Storage

Efficiency

Pore structure

Carbon

Electrodes

Lithium-ion batteries

Vanadium sesquioxide (V2O3) is a promising electrode material for lithium-ion batteries and beyond, yet it encounters structural and cyclic instability issues. Although advances have been made with diverse material combination prototypes, the capacity or role of V2O3 is complicated, limiting rational design and performance enhancement. Herein, we demonstrate a simple, scalable intercalation and annealing strategy for synthesizing carbon-knitted V2O3, impressively in a V2O3 size-tunable manner. While holding similar morphology, composition, and pore structure, the hybrid with 3 nm V2O3 delivers stable cycling simultaneously with greatly improved capacity (450 mAh g-1) and initial Coulombic efficiency (87%) compared with its counterparts. This enhancement is verified by correlating it to the change in capacitive contribution. The study provides a smart and tailorable material model for understanding the lithium storage behavior of V2O3 and opens an avenue to combinedly improve stability, capacity, and initial Coulombic efficiency of V2O3 and other high-capacity intercalatable electrode materials. 2022 American Chemical Society.

2022

Xu, Wenqiang

Niu, Yue

Wang, Denghui

Li, Haimei

Zhang, Siyuan

Zeng, Shumao

Li, Lidong

Ma, Yingjie

Zhi, Linjie

Li, Xianglong

journalArticle

25740962

10.1021/acsaem.2c00196