Fig. 1: The high-entropy-doping effect in Nb2O5.
From: High-entropy-doping effect in a rapid-charging Nb2O5 lithium-ion battery negative electrode
a–c XRD patterns of Nb2O5 phases observed upon heating niobium oxalates in air (a) and nitrogen (b), and high-entropy-doped niobium oxalate in air (c) at different temperatures. The standard PDF patterns for T-(orthorhombic), M-(orthogonal), and H-(monoclinic) phase are inserted at the bottom and top of the graphs, respectively. d The periodic table of selected doping elements for Nb2O5. e The phase-state distribution of doped Nb2O5, including mixed phase, HED-Nb2O5 with impurity and HED-Nb2O5. The square broken line area refers to the high-entropy-doping region. f Schematic illustrations of conventional doping and high-entropy-doping.
