Electrochemical cells with a high voltage cathode
The present disclosure provides a rechargeable electrochemical cell including an electrolyte side, a cathode side, and a polymer/plasticizer. The electrolyte side includes a solid glass electrolyte including an electrolyte mobile cation and electric dipoles, as well as an anode including a metal of the electrolyte mobile cation and contacting the solid glass electrolyte at an anode:solid glass electrolyte interface. The cathode side includes a cathode including a cathode active material into which a cathode guest cation is reversibly extracted/inserted. The cathode active material has a voltage versus lithium (Li) metal of between 3V and 15V. The polymer/plasticizer contacts the solid glass electrolyte at a solid glass electrolyte:polymer/plasticizer interface and the cathode at a polymer/plasticizer:cathode interface such that the cathode guest cation is confined to the cathode side and the electrolyte mobile cation is confined to the anode side during charge and discharge of the electrochemical cell.
1. A method of making an electrochemical cell, the method comprising:
forming an electrochemical cell comprising:
an electrolyte side comprising:
a solid glass electrolyte comprising an electrolyte mobile cation and electric dipoles; and
an anode comprising a metal of the electrolyte mobile cation and contacting the solid glass
electrolyte at an anode:solid glass electrolyte interface;
a cathode side comprising a cathode comprising a cathode active material into which a cathode guest cation is reversibly extracted/inserted, the cathode active material having a voltage versus lithium (Li) metal of between 3V and 15V; and
a polymer/plasticizer contacting the solid glass electrolyte at a solid glass electrolyte:polymer/plasticizer interface and the cathode at a polymer/plasticizer:cathode interface such that the cathode guest cation is confined to the cathode side and the electrolyte mobile cation is confined to the anode side during charge and discharge of the electrochemical cell; and
cycling the electrochemical cell to increase a specific capacity of the electrochemical cell by at least 25 mAh/g.
2. The method of claim 1 , further comprising cycling the electrochemical cell until the electrochemical cell reaches a target specific capacity.
3. The method of claim 1 , comprising charging the electrochemical cell to a full capacity.
4. The method of claim 1 , comprising cycling the electrochemical cell to increase a specific capacity of the electrochemical cell by at least 50 mAh/g.
5. The method of claim 1 , comprising cycling the electrochemical cell to increase a specific capacity of the electrochemical cell by at least 100 mAh/g.
6. The method of claim 1 , comprising cycling the electrochemical cell to increase a specific capacity of the electrochemical cell by at least 200 mAh/g.
7. The method of claim 1 , comprising cycling the electrochemical cell to increase a specific capacity of the electrochemical cell by at least 500 mAh/g.