concentration cell electrolytic cell fuel cell galvanic cell
confident, the Cathode is Negatively charged and attracts 'Cations' which will nicely be certainly charged ions. The Anode is unquestionably charged and attracts the Negatively charged 'Anions'. The function of the electrodes is of no consequence. In electrolysis of brine operations, the Cathode is a mattress of flowing mercury alongside the backside of the telephone with the anodes on the precise. The Na(+) ions type an amalgam with the mercury even because of fact the Cl(-) ions upward thrust to the utmost of the cellphone to type Cl2 gasoline. In a separate reaction, the Na(+) ions are washed out of the mercury via demineralised water in a decomposer section. This varieties NaOH decision and H2 gasoline. If diagrams have been potential in 'solutions', i might draw you one.
electrolytic cell This is the only type of electrochemical cell that is non-spontaneous. It needs energy (usually in the form of electricity) to do its redox reaction. All the other ones you listed are spontaneous
