Liu, J., Y. Zhao, X. Li, C. Wang, Y. Zeng, G. Yue, and Q. Chen. “CuCr2O4@rGO Nanocomposites As High-Performance Cathode Catalyst for Rechargeable Lithium–Oxygen Batteries”. Nano-Micro Letters, vol. 10, no. 2, Dec. 2017, p. 22, doi:10.1007/s40820-017-0175-z.