Copper hexacyanoferrate battery electrodes with long cycle life and high power
KAUST Grant NumberKUS-l1-001-12
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AbstractShort-term transients, including those related to wind and solar sources, present challenges to the electrical grid. Stationary energy storage systems that can operate for many cycles, at high power, with high round-trip energy efficiency, and at low cost are required. Existing energy storage technologies cannot satisfy these requirements. Here we show that crystalline nanoparticles of copper hexacyanoferrate, which has an ultra-low strain open framework structure, can be operated as a battery electrode in inexpensive aqueous electrolytes. After 40,000 deep discharge cycles at a 17g-C rate, 83% of the original capacity of copper hexacyanoferrate is retained. Even at a very high cycling rate of 83g-C, two thirds of its maximum discharge capacity is observed. At modest current densities, round-trip energy efficiencies of 99% can be achieved. The low-cost, scalable, room-temperature co-precipitation synthesis and excellent electrode performance of copper hexacyanoferrate make it attractive for large-scale energy storage systems. © 2011 Macmillan Publishers Limited. All rights reserved.
CitationWessells CD, Huggins RA, Cui Y (2011) Copper hexacyanoferrate battery electrodes with long cycle life and high power. Nat Comms 2: 550. Available: http://dx.doi.org/10.1038/ncomms1563.
SponsorsWe acknowledge support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-l1-001-12). A portion of this work was supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under contract DE-AC02-76SF00515 through the SLAC National Accelerator Laboratory LDRD project. We thank Dr. Judy Cha for TEM imaging.
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Except where otherwise noted, this item's license is described as Open access articles are published under a CC BY license (Creative Commons Attribution 4.0 International License).
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