First make the brine, in a medium saucepan, heat 2 quarts of water and combine all of the brining ingredients minus the lemon. Heat until sugar and salt fully dissolve, then remove from the heat and let cool. Add the chicken to a large bowl and cover with the cooled brine. Let sit in the refrigerator for 2 - 3 hours.
Meanwhile, in a small bowl, mix all of the rub ingredients and set aside. Remove chicken from brine and pat dry. Place chicken on a sheet tray and sprinkle 3 tablespoons of rub over the chicken, being sure to shake off the excess rub.
Place chicken on a medium high grill and cook for approximately 8 - 10 minutes per side or until done. Remove, cover and let rest for approximately 10 minutes before serving.
Recipe by jessica burns at http://jessicaburns.com/2015/07/smoky-6-spice-grilled-chicken-thighs/