Enhanced saturation lithium composition in ball-milled single-walled carbon nanotubes

Materials Science of Carbon Nanotubes: Fabrication, Integration, and Properties of Macroscopic Structures of Carbon Nanotubes

“…TEM micrographs show that the tips of the shortened SWNT bundles are mostly tapered ( Figure 4A), which is distinctly different from the case with those made by mechanical cutting 33 and ball-milling. 31 Experimentally, we found a weight loss of 70% when the purified SWNTs (L > 10 µm) were etched to 0.5 µm average length. This is significantly higher than what is expected if reaction occurs only at the ends.…”

First-principles study on the enhancement of lithium storage capacity in boron doped graphene

“…Experimental investigations have shown that single-wall CNTs exhibit a reversible capacity of upto 500 mAh/g, 3 significantly higher than that of graphite. The maximum capacity of CNTs can be increased to as high as 1000 mAh/g ͑in the form of Li 2.7 C 6 ͒ by chemical etching 4 or ball-milling, 5 which open up paths allowing Li ions to diffuse inside the CNTs. Ever since boron doped CNTs with different B versus C ratios have been synthesized, [6][7][8] they have been expected to have higher Liion storage capability than pristine CNTs, and this has been confirmed both experimentally 9 and theoretically.…”

“…18 The interaction between the Li ions and the 16.7 at. % boron doped graphene, corresponding to BC 5 compound, is modeled in a ͑ ͱ 3 ϫ ͱ 3͒R30°supercell containing six atoms ͑SC 2 ͒. The reciprocal space of this supercell is represented by an 8 ϫ 8 ϫ 1 Monkhorst and Pack grid.…”

Materials Science of Carbon Nanotubes: Fabrication, Integration, and Properties of Macroscopic Structures of Carbon Nanotubes

“…It has been shown, mostly through TEM measurements, that the nanotubes can be fractured and shortened by techniques such as ball-milling, 31,32 mechanical cutting, 33 and chemical etching. [34][35][36] For macroscopic measurements of the openend nanotubes, most of the nanotubes need to be opened and have similar lengths.…”