Hmm well Voli is faster when running towards an enemy so keep that in mind, his W gives him AS and is an execute so when its up and you are low just run until he loses his W stacks, his E has short range so just stay well out of AA range when he uses it and it will miss, his ult is probably his weakest skill to be honest. If you are laning against him
is very useful, if you are Jungle then you will just need to dodge his abilities. His Q and W do run out, so try to kite him until they end.
You said you are playing Lee jg right? Well poke him from afar with Q, slow him and ward jump away while his Q and W is up. If he is low and has his passive, there isnt much you can do unless you are more fed then him. Wait for his passive to heal him and either go back in if you can or run if you are too low. If he does not have passive fight him and make sure you are watching his W stacks, after 3 AA's (including his Q) he can bite you, so if you are low either jump away or kick him away and hit him with your Q. By the time you go back in his W's stacks should have decayed and he wont be able to bite you. I dont play Lee but i know that Lee should probably win that fight since Voli's mechanics are far simpler then Lee's and he has no gap closer while Lee has several ways of moving around a fight.