Xu, M., Y. Feng, B. Chen, R. Meng, M. Xia, F. Gu, D. Yang, C. Zhang, and J. Yang. “Armoring Black Phosphorus Anode With Stable Metal–Organic-Framework Layer for Hybrid K-Ion Capacitors”. Nano-Micro Letters, vol. 13, Jan. 2021, p. 42, doi:10.1007/s40820-020-00570-7.