插层(化学)
阴极
水溶液
材料科学
金属
半径
分析化学(期刊)
多孔性
结晶学
无机化学
化学
物理化学
冶金
复合材料
色谱法
计算机科学
计算机安全
作者
Fangwang Ming,Hanfeng Liang,Yongjiu Lei,Sharath Kandambeth,Mohamed Eddaoudi,Husam N. Alshareef
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2018-09-28
卷期号:3 (10): 2602-2609
被引量:612
标识
DOI:10.1021/acsenergylett.8b01423
摘要
The performance of chemically intercalated V2O5 was found to strongly depend on the interlayer spacing, which is related to the radius of hydrated metal ion, which can be readily tuned by using different intercalated metals. We report a layered Mg2+-intercalated V2O5 as the cathode material for aqueous ZIBs. The large radius of hydrated Mg2+ (∼4.3 Å, compared with 3.8 Å of commonly used Li+) results in an interlayer spacing as large as 13.4 Å (against 11.07 Å for Li+-intercalated V2O5), which allows efficient Zn2+ (de)insertion. As a result, the obtained porous Mg0.34V2O5·0.84H2O cathodes work in a wide potential window of 0.1 to 1.8 V versus Zn2+/Zn, and can deliver high capacities of 353 and 264 mA h g–1 at current densities of 100 and 1000 mA g–1, respectively, along with long-term durability. Furthermore, the reversible Zn2+ (de)intercalation reaction mechanism is confirmed by multiple characterizations methods.
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