AUTHOR=Cao Zeyuan , Wei Bingqing 

TITLE=A Facile Route to Metal Oxides/Single-Walled Carbon Nanotube Macrofilm Nanocomposites for Energy Storage

JOURNAL=Frontiers in Materials

VOLUME=2

YEAR=2015

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2015.00040

DOI=10.3389/fmats.2015.00040

ISSN=2296-8016

ABSTRACT=<p>Nanocomposites consisting of transition-metal oxides and carbon nanomaterials with a desired size and structure are highly demanded for high-performance energy storage devices. Here, a facile two-step and cost-efficient approach relying on directly thermal treatment of chemical vapor deposition products is developed as a general synthetic method to prepare a family of metal oxides [M<italic><sub>x</sub></italic>O<italic><sub>y</sub></italic> (M = Fe, Co, Ni)]/single-walled carbon nanotube (SWNT) macrofilm nanocomposites. The M<italic><sub>x</sub></italic>O<italic><sub>y</sub></italic> nanoparticles obtained are of 3–17 nm in diameter and homogeneously anchor on the free-standing SWNT macrofilms. NiO/SWNT also exhibits a high-specific capacitance of 400 F g<sup>−1</sup> and fast charge-transfer Faradaic redox reactions to achieve asymmetric supercapacitors with a high power and energy density. All M<italic><sub>x</sub></italic>O<italic><sub>y</sub></italic>/SWNT nanocomposites could deliver a high capacity beyond 1000 mAh g<sup>−1</sup> and show excellent cycling stability for lithium-ion batteries. The impressive results demonstrate the promise for energy storage devices and the general approach may pave the way to synthesize other functional nanocomposites.</p>