Dual-Salt Carbothermal Shock Strategy Enabling Ultrafast and Sustainable Regeneration of Spent LiFePO4 Cathode Materials
Dual-Salt Carbothermal Shock Strategy Enabling Ultrafast and Sustainable Regeneration of Spent LiFePO4 Cathode Materials
研究概述
利用NaI/LiI双盐碳热冲击，在秒级时间内修复废旧磷酸铁锂的缺锂及Fe占Li位缺陷。Na引入产生适度晶格扩张并稳定骨架，促进补锂及离子迁移。再生材料3 C循环500次保持92.8%，Ah级软包0.5 C循环100次保持95%。
谱图与表征信息
FIGURE 5 Verification of the structural stability mechanism: (a) XANES and (b) R space of EXAFS spectra of LFP and RLFP. (c,d) Wavelettransform EXAFS results. (e) Raman spectra. (f) DOS of Na-RLFP. (g,h) The comparison of Fe─O/P─O bond length between LFP and Na-RLFP. (i–k) The XRD and XPS of RLFP and Na-RLFP after cycling. (l,m) Schematic of structural changes in RLFP and Na-RLFP after cycling.