Voltage-enhanced energy storage devices

摘要

The present disclosure provides an energy storage device comprising at least one electrochemical cell comprising a negative current collector, a negative electrode in electrical communication with the negative current collector, an electrolyte in electrical communication with the negative electrode, a positive electrode in electrical communication with the electrolyte and a positive current collector in electrical communication with the positive electrode. The negative electrode comprises an alkali metal. Upon discharge, the electrolyte provides charged species of the alkali metal. The positive electrode can include a Group IIIA, IVA, VA and VIA of the periodic table of the elements, or a transition metal (e.g., Group 12 element).

主权项

1. An energy storage device, comprising:
(a) a first electrode comprising a first material; (b) a second electrode comprising a second material; and (c) a liquid electrolyte between said first and second electrodes, wherein said liquid electrolyte is capable of conducting ions from said first material, wherein said energy storage device is configured such that, upon discharge of said energy storage device, said first and second materials react to form an intermetallic layer at an interface between said second electrode and said electrolyte, and wherein said second electrode and said first electrode are at an ampere-hour (Ah) capacity ratio that suppresses bowing of said intermetallic layer.