Electrochemical energy storage devices
摘要
說明書
Temperature-dependent enhanced ionic conductivity is observed, in embodiments, when the interface conductance is greater than that of the bulk—that is, thinner than a threshold of about 700 nm. Invoking ambient temperature performance requires films with acceptable ranges, for example, lower than about 62 nm, in some embodiments. The range from 30 nm to 1 nm may provide exceptional performance, with 1 nm providing negligible resistance to ionic flow while still continuing electron holdoff.
Strained interfaces. Another technique for invoking enhanced ionic migration involves a strained membrane or film. This may be achieved via deposition of heterogeneous electrolyte materials in sandwiched form, such as perovskites/zirconium compounds/perovskites, or the reverse order. Films of substantially less than 1 μm may be useful for achieving the enhanced ionic migration in this way.
Advantageous aspects of the described energy storage devices include, but are not limited to:
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- A true, gel-free, solid-state energy storage device with solid metal containing electrodes and solid electrolyte layers having structural as well as electrical properties. The electrolyte layers include glass or ceramic compositions capable of supporting massive ionic migrations at the dimensions specified, and at ambient or near ambient temperature.
- Bi-layer electrodes capable of forming oxides and successions of higher oxides in the presence of an electrical charge.
- An elementary unit including a single cell comprised of two electrodes and an electrolyte layer all of solid, consolidated construction.
