A High-Performance Solid-State Na-CO2 Battery with Poly(Vinylidene Fluoride-co-Hexafluoropropylene)-Na3.2Zr1.9Mg0.1Si2PO12 Electrolyte

被引:18
作者
Lu, Liang [1 ,2 ]
Sun, Chunwen [1 ,2 ]
Hao, Jian [3 ]
Wang, Zelin [1 ]
Mayer, Sergio F. [4 ]
Fernandez-Diaz, Maria Teresa [5 ]
Alonso, Jose Antonio [4 ]
Zou, Bingsuo [2 ,6 ,7 ]
机构
[1] China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
[2] Guangxi Univ, Sch Phys Sci & Technol, Nanning 530004, Peoples R China
[3] Ningxia Univ, State Key Lab Highefficiency Utilizat Coal & Gree, Yinchuan 750021, Ningxia, Peoples R China
[4] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
[5] Inst Laue Langevin, F-38042 Grenoble, France
[6] Guangxi Univ, Sch Resources Environm & Mat, Minist Educ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China
[7] Guangxi Univ, Sch Resources Environm & Mat, Minist Educ, Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China
基金
中国国家自然科学基金;
关键词
cycling stability; ion transport; Mg-doped NZSP; neutron powder diffraction; solid-state Na-CO2 batteries; RIETVELD REFINEMENT; CARBON-DIOXIDE; ENERGY; CO2; NA; TEMPERATURE; REDUCTION; CATALYSIS; SODIUM;
D O I
10.1002/eem2.12364
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The recovery and utilization of carbon dioxide (CO2) is the key to achieve the targets of peak carbon dioxide emissions and carbon neutrality. The Na-CO2 battery made with cheap alkali metal sodium and greenhouse gas CO2 is an effective strategy to consume CO2 and store clean renewable energy. However, the liquid electrolyte volatilization in the open battery system and inevitable dendrite growth restrict the application of Na-CO2 batteries. In this work, magnesium-doped Na3Zr2Si2PO12 (NZSP) was studied as a solid electrolyte for solid-state Na-CO2 batteries. The ionic conductivity of Na3.2Zr1.9Mg0.1Si2PO12 reaches 1.16 mS cm(-1) at room temperature by replacing Zr ions in Na3Zr2Si2PO12 with Mg ions, and the structural changes are analyzed by neutron powder diffraction. The composite electrolyte consisting of highly conductive Na3.2Zr1.9Mg0.1Si2PO12 and high processability poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is utilized for the first time to assemble a solid-state Na-CO2 battery. The cell shows a full discharge capacity of 7720 mAh g(-1) at 200 mA g(-1). The middle gap voltage is lower than 2 V after 120 cycles at 200 mA g(-1) and at a cut-off capacity of 500 mAh g(-1). This work demonstrates a promising strategy to design high-performance solid-state Na-CO2 batteries.
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页数:9
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