Rechargeable hybrid battery/supercapacitor system
First Claim
1. A rechargeable electrical energy storage system comprising in contiguity a positive electrode member, a negative electrode member, and a separator member interposed therebetween containing a fluid electrolyte comprising a cation and an anion of an ion species of a dissociable salt whereina) said negative electrode member comprises a first material capable of reversibly intercalating said cation of said ion species in response to the application of an electrical charge of a first polarity, and b) said positive electrode member comprises a second material capable of reversibly adsorbing said anion of said ion species in response to the application of a contemporaneous electrical charge of opposite polarity.
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Accused Products
Abstract
A rechargeable hybrid battery/supercapacitor electrical storage system capable of providing high energy and high power densities comprises an intercalation electrode (17) and a capacitor electrode (13) combined with a separator (15) and electrically-conductive current collector elements (11, 19) to form a unitary cell structure (10). An electrolyte solution of a dissociable salt absorbed into the porous structure of the separator (15) provides complementary ion species which respectively reversibly intercalate into the one electrode (17) and capacitively adsorb at the surface of the other electrode (13) upon the application of charging current. The high density stored electrical energy may be recovered at high power over extended periods upon demand of a utilizing device and may be rapidly restored to stable capacity through numerous charging cycles.
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Citations
20 Claims
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1. A rechargeable electrical energy storage system comprising in contiguity a positive electrode member, a negative electrode member, and a separator member interposed therebetween containing a fluid electrolyte comprising a cation and an anion of an ion species of a dissociable salt wherein
a) said negative electrode member comprises a first material capable of reversibly intercalating said cation of said ion species in response to the application of an electrical charge of a first polarity, and b) said positive electrode member comprises a second material capable of reversibly adsorbing said anion of said ion species in response to the application of a contemporaneous electrical charge of opposite polarity.
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12. A rechargeable hybrid battery/supercapacitor system comprising a positive electrode member, a negative electrode member, and a separator member interposed therebetween containing a fluid electrolyte comprising a cation and an anion of an ion species of a dissociable salt wherein
a) said negative electrode member comprises a layer comprising a first material capable of reversibly intercalating said cation of said ion species in response to the application of an electrical charge of a first polarity, and b) said positive electrode member comprises a layer comprising a second material capable of reversibly adsorbing said anion of said ion species in response to the application of a contemporaneous electrical charge of opposite polarity, c) said separator member comprises a microporous layer having dispersed therein a non-aqueous solution of said dissociable salt, and d) each said member is bonded to its contiguous members at their respective interface to form a unitary laminate structure.
Specification