The Core-Shell Heterostructure CNT@Li(2)FeSiO(4)@C as a Highly Stable Cathode Material for Lithium-Ion Batteries

The reasonable design of nanostructure is the key to solving the inherent defects and realizing a high performance of Li(2)FeSiO(4) cathode materials. In this work, a novel heterostructure CNT@Li(2)FeSiO(4)@C has been designed and synthesized and used as a cathode material for lithium-ion battery. I...

Descripción completa

Detalles Bibliográficos
Autores principales: Peng, Tao, Guo, Wei, Zhang, Yingge, Wang, Yangbo, Zhu, Kejia, Guo, Yan, Wang, Yinghui, Lu, Yang, Yan, Hailong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2019
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6797695/
https://www.ncbi.nlm.nih.gov/pubmed/31624928
http://dx.doi.org/10.1186/s11671-019-3165-x
Descripción
Sumario:The reasonable design of nanostructure is the key to solving the inherent defects and realizing a high performance of Li(2)FeSiO(4) cathode materials. In this work, a novel heterostructure CNT@Li(2)FeSiO(4)@C has been designed and synthesized and used as a cathode material for lithium-ion battery. It is revealed that the product has a uniform core-shell structure, and the thickness of the Li(2)FeSiO(4) layer and the outer carbon layer is about 19 nm and 2 nm, respectively. The rational design effectively accelerates the diffusion of lithium ions, improves the electric conductivity, and relieves the volume change during the charging/discharging process. With the advantages of its specific structure, CNT@Li(2)FeSiO(4)@C has successfully overcome the inherent shortcomings of Li(2)FeSiO(4) and shown good reversible capacity and cycle properties.

Ejemplares similares