A novel spring-structured coaxial hierarchical SiO2@Co3O4 nanowire as a lithium-ion battery anode and its in situ real-time lithiation. (16th October 2019)

• Record Type: Journal Article
• Authors: Han, Tianli; Ding, Yingyi; Chen, Yu; Cheng, Dong; Zhou, Ping; Liu, Jinyun
• Is Part Of: Nanotechnology. Volume 31:Number 3(2020)
• Publication Date: 2019-10-16
• Subjects: spiral structure -- Co3O4 -- nanocomposite -- Li-ion battery; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab4848
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: High capacity and stable anodes are demanded since the current graphite-based anode does not meet the high-performance requirements of emerging Li-ion battery systems. Herein, we present a novel spring-shaped hierarchical SiO2 @Co3 O4 nanowire composite, which exhibits good Li-storage performance. The special structure is able to effectively accommodate the change in structure during charge–discharge, and the coaxial hierarchical morphology enables rapid Li + ion and electron transfer. The spring-shaped SiO2 @Co3 O4 anode exhibits a capacity of 770 mAh g −1, along with a high Coulombic efficiency of 99.8% after 400 cycles. A stable rate performance even after three rounds of measurements is also achievable. In addition, the real-time lithiation of the SiO2 @Co3 O4 composite is investigated through an in situ transmission electron microscopy technology, which demonstrates the stable structure of the spring-shaped SiO2 @Co3 O4 composite during the rapid lithiation process.