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The anode is the part of the battery that ions flow to when charging the battery. To save weight as much as possible, you can imagine a case where the anode is
by timerol 2y ago
The anode is the part of the battery that ions flow to when charging the battery. To save weight as much as possible, you can imagine a case where the anode is only the ions that moved to the anode. This is what "anode-free" means. When the battery has charge, there will be some sodium metal as the anode. When the battery is fully discharged, there will be no anode, because the sodium has moved into the cathode.