Low‐Cost Hollow Mesoporous Polymer Spheres and All‐Solid‐State Lithium, Sodium Batteries
Low‐Cost Hollow Mesoporous Polymer Spheres and All‐Solid‐State Lithium, Sodium Batteries
复制标题
DOI：
10.1002/aenm.201501802
复制
发表时间：
2015
影响因子：
27.8
通讯作者：
Weidong Zhou;Hongcai Gao;J. Goodenough
中科院分区：
文献类型：
--
作者：
Weidong Zhou;Hongcai Gao;J. Goodenough
报道了一种实用、低成本的中空介孔有机聚合物(HMOP)球的合成方法。研究了在聚环氧乙烷(PEO)-填料复合材料中用这些微球取代氧化物填料颗粒制备的Li+/Na+-电解质膜的电化学性质。电解质膜机械性能坚固，热稳定性可达250°C以上，可阻挡金属锂/钠阳极上的树枝晶。锂/钠-电解液界面上的Li+/Na+转移阻抗在65°C时最初是可接受的，多孔球填料对杂质的清除降低了这一阻抗。全固态Li/LiFePO4和Na/NaTi2(PO4)3电池在0.5C和65°C下循环100次，放电容量分别为≈130和80mAhg−1。
A practical, low‐cost synthesis of hollow mesoporous organic polymer (HMOP) spheres is reported. The electrochemical properties of Li+/Na+‐electrolyte membranes with these spheres substituting for oxide filler particles in poly(ethylene oxide) (PEO)‐filler composite are explored. The electrolyte membranes are mechanically robust, thermally stable to over 250 °C, and block dendrites from a metallic‐lithium/sodium anode. The Li+/Na+ transfer impedance across the lithium/sodium–electrolyte interface is initially acceptable at 65 °C and scavenging of impurities by the porous‐spheres filler lowers this impedance relative to that with Al2O3. All‐solid‐state Li/LiFePO4 and Na/NaTi2(PO4)3 cells give stable discharge capacity of ≈130 and 80 mAh g−1, respectively, at 0.5 C and 65 °C for 100 cycles.