Is there an add-on I can add to my smartphone's charger that will expedite the charging process?

Hi. I am not an expert on tech, especially current tech. I have a ZTE Tempo X Boost Mobile Android phone. It takes a while for my phone to charge to full capacity. Probably around an hour to do so.

Is there an add-on I can put on my phone's charger that will expedite the charging process?

If so, what I it and where can I get it? I don't want to have to spend a lot of money for it.

I don't having to wait around an hour for my phone to finish charging, especially when I have important business calls to make, or if l have an emergency.

Please help. Thank you.