Study of the lithium diffusion properties and high rate performance of TiNb(6)O(17) as an anode in lithium secondary battery

TiNb(6)O(17) and TiNb(2)O(7) were synthesized using a solid-state method. The techniques were used to assess the electrochemical performance and lithium diffusion kinetics of TiNb(6)O(17) related to the unit cell volume with TiNb(2)O(7). The charge-discharge curves and cyclic voltammetry revealed Ti...

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Detalles Bibliográficos
Autores principales: Lee, Yong-Seok, Ryu, Kwang-Sun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5709400/
https://www.ncbi.nlm.nih.gov/pubmed/29192220
http://dx.doi.org/10.1038/s41598-017-16711-9
Descripción
Sumario:TiNb(6)O(17) and TiNb(2)O(7) were synthesized using a solid-state method. The techniques were used to assess the electrochemical performance and lithium diffusion kinetics of TiNb(6)O(17) related to the unit cell volume with TiNb(2)O(7). The charge-discharge curves and cyclic voltammetry revealed TiNb(6)O(17) to have a similar redox potential to TiNb(2)O(7) as well as a high discharge capacity. The rate performance of TiNb(6)O(17) was measured using a rate capability test. SSCV and EIS showed that TiNb(6)O(17) had higher lithium diffusion coefficients during the charging. From GITT, the lithium diffusion coefficients at the phase transition region showed the largest increase from TiNb(2)O(7) to TiNb(6)O(17).

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