三维NZSPO/PAN-［PEO-NaTFST］复合钠离子电池固体电解质

doi:10.19799/j.cnki.2095-4239.2021.0045

储能科学与技术 ›› 2021, Vol. 10 ›› Issue (3): 931-937.doi: 10.19799/j.cnki.2095-4239.2021.0045

• 固态离子学与储能专刊 • 上一篇下一篇

三维NZSPO/PAN-［PEO-NaTFST］复合钠离子电池固体电解质

刘当玲¹(), 王诗敏¹, 高智慧¹, 徐露富¹, 夏书标²(), 郭洪¹()

^1.云南大学材料与能源学院，云南昆明 650091
^2.曲靖师范学院化学与环境科学学院，云南曲靖 655011

收稿日期:2021-02-01 修回日期:2021-03-11 出版日期:2021-05-05 发布日期:2021-04-30
通讯作者: 夏书标,郭洪 E-mail:1349460754@qq.com;xiashubiao@163.com;guohong@ynu.edu.cn
作者简介:刘当玲（1998—），女，硕士研究生，从事钠离子电池固体电解质研究，E-mail：1349460754@qq.com
基金资助:
国家自然科学基金(52064049);云南省应用基础重点项目(2018FA028 2019FY003023);云南省先进储能材料国际联合研究中心(202003AE140001);2019年度云南省绿能能源固态离子重点实验室建设项目

Properties of three-dimensional NZSPO/PAN-［PEO-NATFST］ sodium-battery-composite solid electrolyte

Dangling LIU¹(), Shimin WANG¹, Zhihui GAO¹, Lufu XU¹, Shubiao XIA²(), Hong GUO¹()

^1.School of Materials and Energy, Yunnan University, Kunming 650091, Yunnan, China
^2.College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, Yunnan, China

Received:2021-02-01 Revised:2021-03-11 Online:2021-05-05 Published:2021-04-30
Contact: Shubiao XIA,Hong GUO E-mail:1349460754@qq.com;xiashubiao@163.com;guohong@ynu.edu.cn

摘要/Abstract

摘要：

本工作采用静电纺丝技术，将快离子导体型无机微纳颗粒Na₃Zr₂Si₂PO₁₂(NZSPO)注入聚丙烯腈（PAN）纳米纤维内，合成了3D纤维网状增强型双连续复合固体电解质材料NZSPO/PAN-[PEO-NaTFST]。结果表明，当NZSPO∶PAN质量比为2∶1时，复合固体电解质室温离子电导率达3.38×10^-5 S/cm，电化学稳定窗口达到4.4 V。以Na₃V₂(PO₄)₃为正极，金属Na为负极，组装成全固态钠离子电池，表现出优异的循环稳定性。首次充放电可逆容量达到109.7 mA·h/g，在0.1 C下200次循环后容量保持为84.5 mA·h/g，容量保持77%，库仑效率接近100%。差示扫描量热分析(DSC)曲线证实了NZSPO-PAN复合纤维可在低温下抑制PEO聚合物的结晶，并加速离子传输动力学的过程。

关键词: 复合固体电解质, 电化学性能, 钠离子电池, NZSPO/PAN-[PEO-NaTFST]

Abstract:

The fast ionic conductive inorganic particles of Na₃Zr₂Si₂PO₁₂ (NZSPO) were introduced into polypropylene fine (PAN) nanofibers and used to form the three-dimensional fiber network-reinforced bicontinuous solid electrolyte composites of NZSPO/PAN-[PEO-NaTFST] via the electrospinning method. When the mass ration of NZSPO∶PAN was regulated at 2∶1, a maximum ionic conductivity at room temperature arrived at 3.38×10^-5 s/cm, and its electrochemical stability window can be expanded to 4.4 V. Na₃V₂(PO₄)₃ and metal Na were adopted as the cathode and anode to assemble an all solid-state sodium-on battery. The reversible capacity of the first cycle was 109.7 mA·h·g^-1, which can be maintained at 84.5 mA·h·g^-1 after 200 cycles with a high coulomb efficiency near 100% at 0.1 C. Differential scanning calorimetry curves confirmed that the NZSPO-PAN composite fiber can inhibit the crystallization of PEO polymer and accelerate the process of ion transport kinetics at low temperatures.

Key words: composite solid electrolyte, electrochemical performance, sodium ion battery, NZSPO/PAN-[PEO-NaTFST]

中图分类号:

TM 912

刘当玲, 王诗敏, 高智慧, 徐露富, 夏书标, 郭洪. 三维NZSPO/PAN-［PEO-NaTFST］复合钠离子电池固体电解质[J]. 储能科学与技术, 2021, 10(3): 931-937.

Dangling LIU, Shimin WANG, Zhihui GAO, Lufu XU, Shubiao XIA, Hong GUO. Properties of three-dimensional NZSPO/PAN-［PEO-NATFST］ sodium-battery-composite solid electrolyte[J]. Energy Storage Science and Technology, 2021, 10(3): 931-937.

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三维NZSPO/PAN-［PEO-NaTFST］复合钠离子电池固体电解质

Properties of three-dimensional NZSPO/PAN-［PEO-NATFST］ sodium-battery-composite solid electrolyte

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