A promising supercapacitor electrode material of CuBi2O4 hierarchical microspheres synthesized via a coprecipitation route
A promising supercapacitor electrode material of CuBi2O4 hierarchical microspheres synthesized via a coprecipitation route
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通过共沉淀法合成的一种有前景的 CuBi2O4 分级微球超级电容器电极材料
DOI：
10.1016/j.jallcom.2016.05.201
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发表时间：
2016-11
影响因子：
6.2
通讯作者：
R.C. Yu
中科院分区：
文献类型：
--
作者：
H.M. Zhang;R.S. Li;X.X. Wang;R.C. Yu
采用共沉淀法合成了cubi2o4级联微球，考察了前驱体溶液中NaOH浓度对产物形貌的影响。Atn(NaOH) = 1 M，可制得0.5 ~ 1 μm的不规则微球。随着NaOH浓度的增加，微球的尺寸越来越大，形貌越来越规则。当NaOH浓度增加到6 M时，可以得到直径为4 ~ 6 μm的规则微球。这些微球由直径为30-60 nm、长度为200-400 nm的纳米棒通过分层自组装工艺构建而成。采用循环伏安法、电化学阻抗法和恒流充放电法研究了制备样品的电化学性能。结果表明，0.5-1 μm微球的比容量最高，在2 M KOH电解液中，电流密度为1 a g−1，比容量可达1895 F g−1。这个值大于大多数过渡金属氧化物的比容量。由于其优异的电化学性能，cubi2o4作为超级电容器电极材料具有广阔的应用前景。
CuBi2O4hierarchical microspheres are synthesized via a coprecipitation method, where the effect of the NaOH concentration in precursor solution on the product morphology is investigated. Atn(NaOH) = 1 M, irregular microspheres of 0.5–1 μm are produced. With increase in the concentration of NaOH, the microspheres grow bigger in size and more regular in morphology. When the NaOH concentration is increased up to 6 M, regular microspheres of 4–6 μm in diameter are obtained. These microspheres are constructed from nanorods with 30–60 nm in diameter and 200–400 nm in length via the hierarchical self-assembly process. The electrochemical performances of the as-prepared samples are investigated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. It is demonstrated that the sample composed of 0.5–1 μm microspheres exhibits the highest specific capacity, reaching about 1895 F g−1in a 2 M KOH electrolyte at a measured current density of 1 A g−1. This value is larger than the specific capacity for most transition metal oxides. Due to its excellent electrochemical performance, CuBi2O4could find a promising application as the supercapacitor electrode material.
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影响因子：
6.6
作者：
Vivier, V;Régis, A;Cachet-Vivier, C
通讯作者：
Cachet-Vivier, C
影响因子：
1
作者：
E. Chater;M. Sellami;N. Bettahar
通讯作者：
E. Chater;M. Sellami;N. Bettahar
影响因子：
32.5
作者：
Lei, Zhibin;Lu, Li;Zhao, X. S.
通讯作者：
Zhao, X. S.
DOI：
10.1021/j100858a046
发表时间：
1968-11
期刊：
The Journal of Physical Chemistry
影响因子：
--
作者：
J. W. Ward
通讯作者：
J. W. Ward
基于香蕉皮的超级电容器电极多级孔泡沫碳的自模板合成
影响因子：
9.2
作者：
Lv, Yaokang;Gan, Lihua;Wright, Dominic S.
通讯作者：
Wright, Dominic S.