7. J.X. Zheng^, W.J. Deng^, Z.X. Hu^, Z.Q. Zhuo, F.S. Liu, H.B. Chen, Y. Lin, W.L. Yang, K. Amine, R. Li*, J. Lu*, F. Pan*, "Asymmetric K/Li-ion battery based on intercalation selectivity", ACS Energy Lett. 2018, 3, 65-71