Dear Dr. Qu:

I write to ask for the result of the interview holded last week. What do you think about the performance I made here? If I have the opportunity to join your research group? During the interview, I said that lithium-ion battery,  sodium-ionbattery or supercapacitor are ok to be my research direction. So which one do you think are best to conform to your group?

Hope to hear your reply and best wishes to you！

Sincerely,

your Bing