Highly ordered mesostructured vanadium phosphonates
(VP) have been synthesized in the presence of cetyltrimethylammonium
bromide (CTAB) as a structure-directing
agent. Nitrilotris(methylene)triphosphonic acid (NMPA)
and (ammonium/sodium) metavanadate (NH4VO3/NaVO3)
have been used for the construction of pore walls. The CTAB
templates are removed from the materials by an extraction
process without destroying the parent mesostructure. The
formation mechanism for the ordered mesoporous structure
and its impact on electrochemical application in lithium ion
batteries (LIBs) are explained by considering the structural
and electrochemical stability of the framework. The results
demonstrate that the counter cations (NH4
+/Na+) of the
metavanadate precursors have a crucial role in stabilizing
the mesoporous structure of the mesoporous VP materials.
Mesoporous VP materials with highly ordered structure have
great applicability as high-performance electrode materials
in LIBs due to the advantages of their large contact area
with electrolyte and short transport paths for lithium ions.
Mesoporous VP electrodes exhibit high reversible specific capacity
with superb cycling stability (100 cycles) and excellent
retention of capacity (92%).