Correction to: Nature Materials https://doi.org/10.1038/s41563-019-0500-7, published online 21 October 2019.

In the version of this Article originally published, the first line of the acknowledgements was missing ‘Office of Basic Energy Sciences’ after ‘Office of Science’; it should have read ‘This work was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division and Scientific User Facilities Division’. This has now been corrected.