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Control of silver vanadium oxide surface areas as a means of controlling voltage delay and Rdc growth in an electrochemical cell
Control of silver vanadium oxide surface areas as a means of controlling voltage delay and Rdc growth in an electrochemical cell
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机译:控制银钒氧化物表面积,以控制电化学电池中的电压延迟和Rdc生长
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摘要
An electrochemical cell comprising a lithium anode, a cathode comprising a blank cut from a free-standing sheet of a silver vanadium oxide mixture contacted to a current collector. The active material has having a relatively lower surface area and an electrolyte activating the anode and the cathode is described. By optimizing the cathode active material surface area in a SVO-containing cell, the magnitude of the passivating film growth at the solid-electrolyte interphase (SEI) and its relative impermeability to lithium ion diffusion is reduced. Therefore, by using a cathode of an active material in a range of from about 0.2 m2/gram to about 2.6 m2/gram, and preferably from about 1.6 m2/gram to about 2.4 m2/gram, it is possible to eliminate or significantly reduce undesirable irreversible Rdc growth and voltage delay in the cell and to extend its useful life in an implantable medical device.
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