High capacity and excellent stability of lithium ion battery anode using interface-controlled binder-free multiwall carbon nanotubes grown on copper.
We present a novel binder-free multiwall carbon nanotube (MWCNT) structure as an anode in Li ion batteries. The interface-controlled MWCNT structure, synthesized through a two-step process of catalyst deposition and chemical vapor deposition (CVD) and directly grown on a copper current collector, showed very high specific capacity, almost three times as that of graphite, excellent rate capability even at a charging/discharging rate of 3 C, and no capacity degradation up to 50 cycles. Significantly enhanced properties of this anode could be related to high Li ion intercalation on the carbon nanotube walls, strong bonding with the substrate, and excellent conductivity.
Lahiri
Indranil
I
Nano Materials and Device Lab, Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida, USA.
Oh
Sung-Woo
SW
Hwang
Jun Y
JY
Cho
Sungjin
S
Sun
Yang-Kook
YK
Banerjee
Rajarshi
R
Choi
Wonbong
W
D003300:Copper / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008094:Lithium / Q000737:chemistry*; D008422:Materials Testing; D036103:Nanotechnology / Q000295:instrumentation*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size
D037742:Nanotubes, Carbon; D003300:Copper; D008094:Lithium