What is the importance of water contact angle of the flexible electrode films in lithium-ion batteries application?
In order to measure the contact angle you must put water on the flexible electrode. You have no such opportunity. Hence the contact angle is irrelevant.
Dear Yuri,
I have already measured the contact angle with the method as you suggested. My film composed of single walled CNTs and polymer. I prepared three films with 20%, 30% and 40% CNT. However, the with one 40% CNT and 60. % polymer showed contact angle 98, means hydrophobic. It is somehow pity because the CNT are usually hydrophilic so composite with more CNT should be more hydrophilic. But here the less CNT based composite is more hydrophilic. The polymer used in this composite hydrophobic. Please comment
The surface of carbon, including graphene, is hydrophobic. Single-wall tubes are obtained from graphene. Therefore, the CNTs are hydrophobic. If they are treated with a laser in air, they will become hydrophilic due to the combination with oxygen. If processed in argon, they will become superhydrophobic. When you get a composite, the surface of the tubes changes chemically and morphologically (concave and convex surfaces appear). This affects wettability by water.
Dear Yuri,
thank you for a nice piece of discussion here. I well agree with you
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