Fabrication of highly ordered porous nickel phosphide film and its electrochemical performances toward lithium storage
▶ Highly ordered porous Ni 3P film is successfully prepared by a facile electrodeposition method. ▶ The nanostructured porous Ni 3P film exhibits significantly improved capability and reversibility over the dense one. ▶ The porous structure is stable and can sustain well even after 50 cycles. ▶ The...
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Published in | Journal of alloys and compounds Vol. 509; no. 1; pp. 157 - 160 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier B.V
05.01.2011
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | ▶ Highly ordered porous Ni
3P film is successfully prepared by a facile electrodeposition method. ▶ The nanostructured porous Ni
3P film exhibits significantly improved capability and reversibility over the dense one. ▶ The porous structure is stable and can sustain well even after 50 cycles. ▶ The simple and low-cost method provides a potential approach for fabricating other nanoporous transition metal phosphide films.
Highly ordered porous Ni
3P film was successfully electrodeposited through a self-assembled monodisperse polystyrene sphere template on copper substrate after heat treatment. The spherical pores left in the film after the removal of polystyrene spheres are well-ordered and close-packed. The diameter of the pores arranged in the film is about 800
nm and the thickness of the wall connecting adjacent pores is 60
nm. As anode for lithium ion batteries, the nanostructured porous Ni
3P film exhibits improved capability and reversibility over the dense one. After 50 cycles, the reversible capacity of the porous Ni
3P film is 403
mAh
g
−1 and 239
mAh
g
−1 at 0.2
C and 2
C, maintaining 78.1% and 67.9% of the capacity in the 2nd cycle, respectively. The enhanced electrochemical performance of the porous film is attributed to the better contact between Ni
3P and electrolyte, which provides more sites for Li
+ accommodation, shortens the diffusion length of Li
+ and enhances the kinetics of electrode process. Moreover, the porous structure is stable and can sustain well even after 50 cycles. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2010.09.013 |