High magnification of TEM image of LiCoO2

This paper was published at The 18th International Conference on Solid State Ionics, 1-6 July, 2007, Shanghai International Convention Centre, Shanghai, CHINA.

(a)

(b)

The Figure (a) above shows high magnification Transmission Electron Microscope (TEM) image of the LiCoO2 synthesized in our laboratory. Particle size of the focus image is 35 nm. The focus image is a single crystal particle, where the fringes can be observed in the TEM image. This fringes are representing interlayer dispacing of the lattice structure. The distance between fringes is shown in the subfigure, which is 1.4 nm or 14Å.

Calculation using XRD data show as follows;

Bragg Law, d = n(lambda)/ (2 x Sin(theta))
= 1.5406/ (2 x Sin(9.38))
= 4.7258Å

length of the c axis, c = 3d
= 3 x 4.7258Å
= 14.1Å or 1.41 nm

Result above shows the agreement between TEM measurement data and lattice size calculated using XRD data.

Figure (b) shows the lattice size for LiCoO2 as publish in Nature, (2003) Vol. 2, pg. 464-467