A Universal Precipitation‐Transformation Strategy Toward Low‐Defect Prussian Blue Analogs for High‐Performance Sodium‐Ion Batteries
A Universal Precipitation‐Transformation Strategy Toward Low‐Defect Prussian Blue Analogs for High‐Performance Sodium‐Ion Batteries
研究概述
提出难溶金属前驱体的沉淀–转化路线，以缓慢金属释放抑制成核速率，制备低空位、低配位水、高结晶度普鲁士蓝类似物，适用于单金属到高熵体系并可放大至596克。优化铁基正极在0.1 C下容量150.5 mAh/g，5 C循环2000次保持93%；硬碳全电池循环400次保持85%以上。
谱图与表征信息
FIGURE 2 Local coordination environment analysis of the Fe centers in T-FeHCF and C-FeHCF. (a) Normalized Fe K-edge XANES spectra, (b) Fourier-transformed intensities of Fe K-edge EXAFS spectra. (c,d) Wavelet transform profiles of T-FeHCF and C-FeHCF.