Highly crystalline and thermally stable pure multi-walled Ni3Si2O5(OH)4 nanotubes with a layered structure
have been synthesized in water at a relatively low temperature of 200–210 °C using a facile and simple method.
The nickel ions between the layers could be reduced in situ to form size-tunable Ni nanocrystals, which endowed
these nanotubes with tunable magnetic properties. Additionally, when used as the anode material in a lithium
ion battery, the layered structure of the Ni3Si2O5(OH)4 nanotubes provided favorable transport kinetics for lithium
ions and the discharge capacity reached 226.7 mA·h·g–1 after 21 cycles at a rate of 20 mA·g–1. Furthermore, after the
nanotubes were calcined (600 °C, 4 h) or reduced (180 °C, 10 h), the corresponding discharge capacities increased
to 277.2 mA·h·g–1 and 308.5 mA·h·g–1, respectively.