Thank you for the opportunity to help you with your question!
This is correct. The concentration gradient has to do with the concentration difference usually over a semi-permeable membrane. Solute will flow "down" the gradient or from the place of higher concentration of solute to the place of lower concentration of solute.
The electrochemical gradient has to do with charge. Charge will move from a higher concentration area to a lower concentration area. This is because like charges repel and thus want to move as far away from one another as possible. A high concentration of charged solute will have a much higher repulsive force and thus spread out to areas where there is a low concentration of charged solute so as minimize the amount of repulsive forces.
Please let me know if you need any clarification. I'm always happy to answer your questions.