聚阴离子型二次离子电池正极材料研究进展

闫琦, 兰元其, 姚文娇, 唐永炳

Recent development of polyanionic cathodes for second ion batteries

Qi YAN, Yuanqi LAN, Wenjiao YAO, Yongbing TANG

图3 (a) Na4M3(PO4)2(P2O7)(M=Fe、Mn、Co、Ni)晶胞结构示意图[38]；(b) NFPP/C半电池在0.05 C电流密度下前两圈充放电曲线[39]；(c) NFPP/C半电池在0.5 C电流密度下循环性能[39]；(d) NFPP/C脱钠过程中晶胞参数与体积变化图(1 ?=10-10 nm)[39]

Fig. 3 (a) crystal structure of Na4M3(PO4)2(P2O7)(M=Fe、Mn、Co、Ni)[38]; (b) galvanostatic charge-discharge curves of NFPP/C-500 cycled at 0.05 C[39]; (c) long-term cycling performance of NFPP/C-500 at 0.5 C[39]; (d) lattice parameters of NFPP/C-500 during the first charge process as a function of sodium concentration estimated from the electrochemical charge current[39]