材料科学
兴奋剂
钠
离子电导率
电池(电)
离子键合
离子
中子衍射
钠离子电池
分析化学(期刊)
电导率
晶体结构
电极
电解质
结晶学
物理化学
热力学
光电子学
冶金
化学
法拉第效率
功率(物理)
有机化学
物理
色谱法
作者
Liang Lu,Yao Lu,J. A. Alonso,Carlos A. López,M. T. Fernández‐Díaz,Bingsuo Zou,Chunwen Sun
标识
DOI:10.1021/acsami.1c13000
摘要
The limit of the energy density and increasing security issues on sodium-ion batteries (SIBs) impede their further development. Solid-state sodium metal batteries are potential candidates to replace the present SIBs. However, low ionic conductivity and poor interface contact hinder their progress. In this work, the impact of Al doping on the crystalline structure and ionic transport in Na3.4Zr2(Si0.8P0.2O4)3 was studied by neutron powder diffraction. The ionic conductivity of Na3.5Zr1.9Al0.1Si2.4P0.6O12 achieves 4.43 × 10–3 S cm–1 at 50 °C. The polarization voltage of the Na||Na symmetric battery is about 40 mV after cycling for more than 1600 h. Moreover, a solid-state sodium–sulfur battery with a monolithic structure was constructed to alleviate the interfacial resistance problems. Its specific discharge capacity can still keep 300 mA h g–1 after 480 cycles at 300 mA g–1. The work provides a promising strategy to design solid-state sodium–sulfur batteries with high performances.
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