A family of materials that can be used to build batteries to meet the needs for grid-scale storage - high power, efficient, and long cycle life.

About

Researchers in Prof. Yi Cui’s laboratory have developed a family of materials that can be used to build batteries to meet the needs for grid-scale storage - high power, efficient, and long cycle life. These metal-organic-framework (MOF) materials can be scaled for reliable, inexpensive bulk production of batteries with aqueous electrolytes. In addition, the MOF electrodes can be combined with the anode technology described in Stanford Docket S11-344 for improved performance.


The Prussian Blue crystal structure. The open metal-organic framework allows hydrated ions such as potassium and ammonium to easily migrate between neighboring A Sites. This allows the material to last many cycles at high power.The inventors have synthesized several different MOF materials and demonstrated their electrochemical cycling at high power outputs with extremely long cycle life.

Key Benefits

Ultra-long life cycle - 83% capacity retained after 40,000 cycles (compared to 500 cycles for lithium ion technology)
Very high power output from fast ion transport
Low-cost, scalable production:
fast powder precipitation from inexpensive, abundant chemical precursors
no heating or processing
Efficient - round trip energy efficiency reaches 99%
Aqueous electrolytes are inexpensive, safe and highly conductive
 

Applications

Batteries/large-scale energy storage for use with electrical power grids

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