A novel membrane based on cellulose acetate nanofibers with a ZrO2 reinforcement layer for advanced sodium-ion batteries

被引：23

作者：

Zhu, Tianming ^{[1
]}

Zuo, Xiaoxi ^{[1
]}

Li, Yawen ^{[1
]}

Zhang, Lengdan ^{[1
]}

Xie, Dongming ^{[1
]}

Xiao, Xin ^{[1
]}

Liu, Jiansheng ^{[2
]}

Nan, Junmin ^{[1
]}

机构：

[1] South China Normal Univ, Sch Chem, MOE Key Lab Theoret Chem Environm, Guangzhou Key Lab Mat Energy Convers & Storage, Guangzhou 510006, Peoples R China

[2] Guangzhou Great Power Energy Technol Co Ltd, Guangzhou 511483, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2021年 / 620卷

基金：

中国国家自然科学基金;

关键词：

Cellulose acetate; ZrO2 reinforcement layer; Wettability; Enhanced electrochemical performance; Sodium-ion battery; ELECTROCHEMICAL PERFORMANCE; SEPARATOR; SAFE;

D O I：

10.1016/j.memsci.2020.118917

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A novel ZrO2-reinforced nanofibmus membrane for sodium-ion batteries was synthesized via fabricating a ZrO2 reinforced layer on the surface of the modified cellulose acetate membrane (MCA) by a new and simple in-situ chemical precipitation method. Upon the rational design, the ZrO2-reinforced nanofibmus membranes exhibit high chemical stability and excellent wettability (a decreased contact angle from 26.8 degrees to 7.4 degrees) in electrolytes. Moreover, the ZrO2-reinforced nanofibrous membranes also show no distinct dimensional change after being kept at 250 degrees C for 30 min and high tensile strength up to 1.15 MPa. Compared to that of the MCA membrane (1.61 mS cm(-1)), the ZrO2@MCA-0.5h (immersed in a ZrO(NO3)(2) solution for 0.5 h) exhibits a high ionic conductivity of 2.23 mS cm(-1). Additionally, the cell with the ZrO2@MCA-0.5h displays a high discharge capacity of 224.8 mAh g(-1) at 0.5 C, which are higher than those of the MCA membrane (156.1 mAh g(-1)). Meanwhile, the rate performance of the cells assembled with the ZrO2-reinforced nanofibrous membranes, especially with the ZrO2@MCA-0.5h membrane , are also better than that of the MCA. All the above improvements can be attributed to the presence of the continuous-phase ZrO2 reinforcement layer fabricated on the surface of the MCA membrane, which forms a strong self-adhesive structure among fibers to enhance mechanical strength and has a good affinity for the electrolyte to obtain high ionic conductivity.

引用

页数：11

共 45 条

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