以釩基多金屬氧酸鹽作為鈉離子電池之陰極材料

Vanadium-based Polyoxometalates as a Cathode Material for Sodium-ion Batteries

林佳慶(Chia-Ching Lin) ； 陳翰儀(Han-Yi Chen)

《化學》 76卷3期 (2018/09) Pp. 211-216

https://doi.org/10.6623/chem.201809_76(3).004

摘要

鈉離子電池擁有成本低廉的優勢，可應用在大型儲能設備上，作為鋰離子電池的替代方案。本研究成功利用溶液法合成釩基多金屬氧酸鹽(vanadium-based polyoxometalate, Na_7[NiV_(13)O_(38)])，並透過X光繞射儀、傅立葉轉換紅外光譜儀、感應耦合電漿質譜法進行材料分析。以Na_7[NiV_(13)O_(38)]作為鈉離子電池陰極材料，透過電化學分析得知其在15 mA g^(-1)之充放電電流密度下，可達到125 mA h g^(-1)之可逆電容量，且在30圈循環後仍擁有80%的電容量，說明此材料為有潛力之鈉離子電池陰極材料。

關鍵字

多金屬氧酸鹽 ； 鈉離子電池 ； 陰極材料

並列摘要

Sodium-ion batteries (NIBs) are promising candidate for large-scale energy storage systems because sodium is abundant which enables lower cost of NIBs than LIBs. In this research, a vanadium-based polyoxometalate, Na_7[NiV_(13)O_(38)], was synthesized through a solution process, and the material characterization were carried out thought X-ray Diffraction, Fourier-transform Infrared Spectroscopy, and Inductively Coupled Plasma Mass Spectrometry. Na_7[NiV_(13)O_(38)] as cathode in NIBs reveals a reversible capacity of 125 mA h g^(-1) at 15 mA g^(-1) with well cycling stability (with capacity retention of 80% after 30 cycles), indicating that it is a potential cathode material for NIBs.

並列關鍵字

Polyoxometalate ； Sodium-ion batteries ； Cathode