Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



K2Ti6O13/carbon core–shell nanorods as a superior anode material for high-rate potassium-ion batteries

Author affiliations

Abstract

Bunches of oriented K2Ti6O13 nanorods coated by a thin carbon layer (4–7 nm) were prepared by combining hydrothermal and heat treatment in sequence. The K2Ti6O13 nanorods possess long- and short-axis crystal orientations of <010> and <001>, respectively, contributing to fast K+ diffusion, and the carbon-coating layer improves the electron conductivity. In addition, the obtained K2Ti6O13/carbon has a high compaction density, which is beneficial for realizing high volumetric specific capacity. When evaluated as a potassium-ion battery anode, the nanorods demonstrated a superior rate capability (122.5, 104.3, 92.3, 78.6 and 65.1 mA h g−1 at current densities of 20, 50, 100, 200 and 500 mA g−1, respectively), a favourable cycle life (118.5 mA h g−1 at 25 mA g−1 for 200 cycles) and high capacity retention.

Graphical abstract: K2Ti6O13/carbon core–shell nanorods as a superior anode material for high-rate potassium-ion batteries

Back to tab navigation

Supplementary files

Article information


Submitted
02 Feb 2020
Accepted
28 Apr 2020
First published
28 Apr 2020

Nanoscale, 2020, Advance Article
Article type
Communication

K2Ti6O13/carbon core–shell nanorods as a superior anode material for high-rate potassium-ion batteries

C. Liu, H. Wang, S. Zhang, M. Han, Y. Cao, S. Liu, Z. Yang, A. Chen and J. Sun, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR00898B

Social activity

Search articles by author

Spotlight

Advertisements