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 ℃ using a facile and simple metho...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 ℃ 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 ℃, 4 h） or reduced （180℃ 10 h）, the corresponding discharge capacities increased to 277.2 mA.h.g-1 and 308.5 mA.h.g-1, respectively.展开更多
基金This work was supported by the Natural Science Foundation of China （No. 20725102）, the Fok Ying Tung Education Foundation （No. 111012）, and the State Key Project of Fundamental Research for Nanoscience and Nanotechnology （Nos. 2011CB932402, 2007CB310501, and 2011CB935704）.
文摘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 ℃ 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 ℃, 4 h） or reduced （180℃ 10 h）, the corresponding discharge capacities increased to 277.2 mA.h.g-1 and 308.5 mA.h.g-1, respectively.
