Correction to: Nature Energy https://doi.org/10.1038/s41560-019-0336-z, published online 11 March 2019.

In the version of this Review originally published, some of the references in Fig. 2b were incorrectly numbered. References 31, 45, 46, 47, 48, 57 and 58 should have been 32, 46, 47, 48, 49, 58 and 31, respectively. This has now been corrected.