Page 26 - Shimadzu Journal vol.10 Issue1

Materials Science

(3) Attractive Force Images
Normally, attractive forces in force curves are said to be caused Conclusion
by meniscus forces, van der Waals forces, or electrical forces due
to water adsorption on the surface of a sample. In these measure- The surfaces of all-solid-state LiB electrode materials LCO and
ments, however, the water vapor concentration was 75 ppm or less, LTO were measured without exposure to air, and height images,
so the effect of meniscus forces was likely small. Taking the above current images, and attractive force images were obtained. It is ex-
into consideration, it was found that the 5 µm LCO attractive force pected that such measurements will be applicable to the resolution
image (g) was correlated with the distribution in both the 5 µm of issues with resistance at the interface in all-solid-state LiBs.
LCO height image (e) and the 5 µm LCO current image (f). It was
also found that the 5 µm LTO attractive force image (j) was cor-
related to the distribution of plate-like crystals in the 5 µm LTO References
height image (h) (arrows). It is therefore likely that the attractive 1. Application News No. S 47 New SPM Measurement Method: ZXY
force images represent van der Waals forces or electrical forces, Scanning, Overcoming the Difficulties of Conventional SPM
and that these indicate the compositional distribution of the elec- Measurement
trode material. 2. Application News No. S 49 Visualization of Spatial Distribution of
From the information above, it is likely that the LCO current Magnetic Force by ZXY Measurement
distribution reflects the compositional distribution of the material, 3. Application News No. S 57 Visualization of Distribution of
and that the path of the current is due to cracks or gaps between the Electrostatic Force in Electrolyte Clarifying Corrosion and Cell
grains. Regarding the LTO, for which current images could not be Reactions
obtained in this case, there are plans to measure the anode of an 4. Application News 01-00256-EN Visualization of Current Distribution
actual battery after charging. by ZXY Measurement: Current Measurement of Graphite Sample

(a) LCO Height Image 30 µm (b) LCO Current Image 30 µm (c) LTO Height Image 30 µm (d) LTO Current Image 30 µm

(e) LCO Height Image 5 µm (f) LCO Current Image 5 µm (g) LCO Attractive Force Image 5 µm

(h) LTO Height Image 5 µm (i) LTO Current Image 5 µm (j) LTO Attractive Force Image 5 µm
Fig. 5. Height Images, Current Images, and Force Curve Attractive Force Images

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