Preparation of flexible porous γ-Al2O3 nanofibers by electrospinning and its application in supercapacitor separator

被引：2

作者：

Wen, Jiajie ^{[1
,2
]}

Li, Kechen ^{[1
]}

Xu, Kaizheng ^{[1
]}

Li, Runkang ^{[1
]}

Lv, Dongfeng ^{[1
]}

Cui, Yi ^{[1
,3
]}

Chen, Yuejun ^{[1
]}

Wei, Yingna ^{[1
]}

Yu, Yang ^{[3
]}

Yu, Yun ^{[3
]}

Wei, Hengyong ^{[1
,3
]}

机构：

[1] North China Univ Sci & Technol, Coll Mat Sci & Engn, Hebei Prov Key Lab Inorgan Nonmet Mat, Tangshan 063009, Hebei, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai, Peoples R China

[3] Chinese Acad Sci, Key Lab Inorgan Coating Mat, Shanghai 200050, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2024年 / 28卷 / 11期

关键词：

Flexible gamma-Al2O3 nanofibers; Electrospinning; Supercapacitor separator; Flame retardant; LITHIUM-ION BATTERIES; COMPOSITE SEPARATORS; ALUMINA NANOFIBERS; POLYMER MEMBRANE; PERFORMANCE; FABRICATION; TRANSITION; FIBERS; GEL;

D O I：

10.1007/s10008-024-06047-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper, a 150-mu m-thick flexible gamma-Al2O3 nanofiber separator with the tensile strength of 0.22 MPa was prepared from the low-cost aluminum chloride hydroxide/polyvinyl alcohol (PVA)/water precursor materials by electrospinning method. The resultant separator with 3D interconnection nanostructure revealed fiber diameters in the range of 200 to 500 nm. The specific surface area, porosity, and electrolyte uptake of gamma-Al2O3 nanofiber separator are 31.5 m(2)/g, 55%, and 1021%, higher than that of commercial polypropylene (PP) separator and glass fiber (GF) separator. The supercapacitor assembled with the gamma-Al2O3 nanofiber separator exhibited a high discharge specific capacitance of 93 F/g at the current density of 1A/g, and there is almost no capacity decay after 10,000 cycles. The energy density of supercapacitor assembled with gamma-Al2O3 nanofiber separator is 31.7 Wh/kg at the power density of 562.6 W/kg. Meanwhile, the rate performance of the supercapacitor is improved significantly due to the existence of porous structure and low ion diffusion resistance (0.78 Omega) of gamma-Al2O3 nanofiber separator. In addition, the thermal performance of the gamma-Al2O3 nanofiber separator is also excellent, which has almost no shrinkage at the temperature of 200 degrees C and cannot be ignited. Therefore, the obtained gamma-Al2O3 nanofibers could serve as a promising alternative separator for a new generation of safe, high-power supercapacitors.

引用

页码：4325 / 4338

页数：14