Understanding the
growth modes of 2D transition-metal oxides through
direct observation is of vital importance to tailor these materials
to desired structures. Here, we demonstrate thermolysis-driven growth
of 2D V2O5nanostructures viain situtransmission electron microscopy (TEM). Various growth stages in
the formation of 2D V2O5nanostructures through
thermal decomposition of a single solid-state NH4VO3precursor are unveiled during thein situTEM heating. Growth of orthorhombic V2O52D
nanosheets and 1D nanobelts is observed in real time. The associated
temperature ranges in thermolysis-driven growth of V2O5nanostructures are optimized throughin situandex situheating. Also, the phase transformation
of V2O5to VO2was revealed in real
time byin situTEM heating. Thein situthermolysis results were reproduced usingex situheating, which offers opportunities for upscaling the growth of
vanadium oxide-based materials. Our findings offer effective, general,
and simple pathways to produce versatile 2D V2O5nanostructures for a range of battery applications.