Unfortunately, you cannot sell your Pi coins from your Pi wallet to Binance or any other external exchange. This is because Pi coins cannot be traded on exchanges yet, and they can only be traded within the Pi blockchain network.
Currently, transactions are only allowed within Pi wallets on the Pi browser. This means you cannot transfer or sell your Pi coins to potential Pi buyers or any exchange that has a Pi wallet to receive Pi coins.
If you're looking for alternative solutions, consider contacting my trusted Pi vendor, @Pitradeboard on Telegram, a top trader with high positive reviews.