Phys.org September 30, 2022
Researchers in China prepared an integrated air electrode with highly ordered channels. They observed morphological composition and distribution of Li2O2 inside the real air electrode. The results showed that the toroidal Li2O2 was constrained by the channel size and exhibited a larger diameter on the separator side at high currents. The coupling effects of charge transfer impedance and concentration polarization on sudden death were analyzed in-depth at low and high currents. The growth model suggested that toroidal Li2O2 exhibited a high dependence on the electrode surface structure. They proposed a new route where the Li2O2/electrode interface of a toroid was controlled partially by the second single-electron reduction…read more. TECHNICAL ARTICLEÂ
Graphic abstract. Credit: Nano Lett. 2022, 22, 18, 7527–7534, September 7, 2022Â