Nonporous TiO@C Microsphere with a Highly Integrated Structure for High Volumetric Lithium Storage and Enhance Initial Coulombic Efficiency

Overview

Journal Sci Rep

Specialty Science

Date 2024 Dec 27

PMID 39730721

Authors

Jinpeng Yin

Guanqin Wang

Dongqing Kong

Chuang Li

Qiang Zhang

Dongbai Xie

Yangyang Yan

Ning Li

Qiang Li

Affiliations

Soon will be listed here.

Abstract

To enhance the volumetric energy density and initial coulombic efficiency (ICE) of titanium oxide (TiO) as anode electrode material for lithium-ion batteries (LIB), this study employed a surface-confined in-situ inter-growth mechanism to prepare a TiO embedded carbon microsphere composite. The results revealed that the composite exhibited a highly integrated structure of TiO with oxygen vacancies and carbon, along with an exceptionally small specific surface area of 11.52 m/g. Due to its unique microstructure, the composite demonstrated remarkable lithium storage properties, including a high ICE of 75%, a notable capacity of 426.8 mAh/g after 200 cycles at 0.2 A/g, superior rate performance of 210.1 mAh/g at 5 A/g, and an outstanding cycle life, with a capacity decay rate of only 0.003% per cycle over 2000 cycles. Furthermore, electrochemical kinetic studies further validated the advantages of this microstructure.

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