Additional file 1: of Scalable Synthesis Nano-Perovskite K(Mn0.95Ni0.05)F3 Cathode by Homogeneous Precipitation Method for Potassium-Ion Batteries

Figure S1. K(Mn0.95Ni0.05)F3/MWCNT composites. (a) XRD pattern, (b) XPS survey spectrum, (c) high-resolution XPS spectrum of C1s. Figure S2. Rate performance (a) and CV curves (b) of K(Mn0.95Ni0.05)F3/MWCNTs as the cathode over the voltage range 4.4–1.2 V vs. K/K+. Figure S3. Nyquist plots of the K(Mn0.95Ni0.05)F3/MWCNT electrode at various potentials during the first discharge process. Figure S4. Nyquist plots of the K(Mn0.95Ni0.05)F3/MWCNT electrode at Open circuit potential. Figure S5. Equivalent circuit of K(Mn0.95Ni0.05)F3/MWCNT cathode during the first charge and discharge process. Figure S6. Nyquist plots of K(Mn0.95Ni0.05)F3 and K(Mn0.95Ni0.05)F3/MWCNT cathode at the first charge to 4.0 V. (ZIP 4678 kb)

图S1 为K(Mn₀.₉₅Ni₀.₀₅)F₃/多壁碳纳米管（MWCNT）复合材料：(a) X射线衍射（XRD）图谱，(b) X射线光电子能谱（XPS）全谱，(c) C1s高分辨X射线光电子能谱。图S2 为以K(Mn₀.₉₅Ni₀.₀₅)F₃/MWCNT为正极的电极，在相对于K/K+参比电极的4.4~1.2 V电压区间内的(a) 倍率性能曲线与(b) 循环伏安（CV）曲线。图S3 为K(Mn₀.₉₅Ni₀.₀₅)F₃/MWCNT电极在首次放电过程中不同电位下的奈奎斯特（Nyquist）图。图S4 为K(Mn₀.₉₅Ni₀.₀₅)F₃/MWCNT电极在开路电位下的奈奎斯特图。图S5 为K(Mn₀.₉₅Ni₀.₀₅)F₃/MWCNT正极在首次充放电过程中的等效电路。图S6 为K(Mn₀.₉₅Ni₀.₀₅)F₃与K(Mn₀.₉₅Ni₀.₀₅)F₃/MWCNT正极在首次充电至4.0 V时的奈奎斯特图。（压缩包大小4678 KB）