Copper hexacyanoferrate battery electrodes with long cycle life and high power

Colin D. Wessells, Robert A. Huggins, Yi Cui

Research output: Contribution to journalArticlepeer-review

784 Scopus citations

Abstract

Short-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.
Original languageEnglish (US)
JournalNature Communications
Volume2
Issue number1
DOIs
StatePublished - Nov 22 2011
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-l1-001-12
Acknowledgements: We 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.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

Fingerprint

Dive into the research topics of 'Copper hexacyanoferrate battery electrodes with long cycle life and high power'. Together they form a unique fingerprint.

Cite this