Ultrafast Zn2+ Intercalation and Deintercalation in Vanadium Dioxide

被引：613

作者：

Ding, Junwei ^{[1
]}

Du, Zhiguo ^{[1
]}

Gu, Linqing ^{[1
]}

Li, Bin ^{[1
]}

Wang, Lizhen ^{[2
]}

Wang, Shiwen ^{[2
]}

Gong, Yongji ^{[1
]}

Yang, Shubin ^{[1
]}

机构：

[1] Beihang Univ, Key Lab Aerosp Adv Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[2] Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Zhengzhou 450002, Henan, Peoples R China

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 26期

基金：

中国国家自然科学基金;

关键词：

cathodes; intercalation reaction; pseudocapacitance; vanadium dioxide; zinc-ion batteries; CATHODE MATERIAL; ENERGY-STORAGE; HIGH-CAPACITY; BATTERIES; CHEMISTRY; MECHANISM; NANORODS;

D O I：

10.1002/adma.201800762

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Although rechargeable aqueous zinc-ion batteries have attracted extensive interest due to their environmental friendliness and low cost, they still lack suitable cathodes with high rate capabilities, which are hampered by the intense charge repulsion of bivalent Zn2+. Here, a novel intercalation pseudocapacitance behavior and ultrafast kinetics of Zn2+ into the unique tunnels of VO2 (B) nanofibers in aqueous electrolyte are demonstrated via in situ X-ray diffraction and various electrochemical measurements. Because VO2 (B) nanofibers possess unique tunnel transport pathways with big sizes (0.82 and 0.5 nm(2) along the b- and c-axes) and little structural change on Zn2+ intercalation, the limitation from solid-state diffusion in the vanadium dioxide electrode is eliminated. Thus, VO2 (B) nanofibers exhibit a high reversible capacity of 357 mAh g(-1), excellent rate capability (171 mAh g(-1) at 300 C), and high energy and power densities as applied for zinc-ion storage.

引用

页数：6

共 29 条

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