Dopant-regulated intermediate cation disorder enables submicron-sized single-crystal ultrahigh-Ni oxide cathodes
Dopant-regulated intermediate cation disorder enables submicron-sized single-crystal ultrahigh-Ni oxide cathodes
研究概述
以Ti⁴⁺/Zr⁴⁺共掺调节超高镍NCM锂化过程中的中间态阳离子无序，促进晶界融合并抑制颗粒过度长大，形成约0.61 μm均匀单晶颗粒。优化正极0.1 C初始容量226.1 mAh/g，1 C循环200次保持79.5%，阐明中间态结构对单晶生长及性能的作用。
谱图与表征信息
Fig. 2 (a) The Ni-K edge XANES spectra of Pure-NCM and TZ-NCM; (b) EXAFS R space spectra at Ni-edge for Pure-NCM and TZ-NCM; the wavelettransformed Ni-K edge EXAFS of (c) Pure-NCM and (d) TZ-NCM.