Polyol-Mediated Synthesis of Mesoporous α-Ni(OH)2 with Enhanced Supercapacitance

被引：152

作者：

Du, Hongmei ^{[1
]}

Jiao, Lifang ^{[1
]}

Cao, Kangzhe ^{[1
]}

Wang, Yijing ^{[1
]}

Yuan, Huatang ^{[1
]}

机构：

[1] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Inst New Energy Mat Chem, Key Lab Adv Energy Mat Chem MOE, Tianjin 300071, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 14期

关键词：

solvothermal; mesoporous microspheres; alpha-Ni(OH)(2); supercapacitor; ALPHA-NICKEL HYDROXIDE; CAPACITANCE; SURFACE; NANOSTRUCTURES; PRECIPITATION; MICROSPHERES; NI(OH)(2);

D O I：

10.1021/am401341h

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

Flower-like alpha-Ni(OH)(2) microspheres composed of nanowires are prepared by a solvothermal method using triethylene glycol and water as the mixed solvent. The formation of this unique structure is attributed to the synergetic effect of dissolution-recrystallization procedure, Ostwald ripening, and aggregative lateral attachment. Experimental results indicate that the dielectric constant, viscosity, and the chain lengths of the alcohols in the solvent may greatly affect the morphology and size of the as-obtained alpha-Ni(OH)(2) samples. Because of the high Brunauer, Emmett, and Teller (BET) nitrogen sorption surface area of 318 m(2) g(-1) and large pore volume, this sample displays a maximum discharge specific capacity of 1788.9 F g(-1) at a discharge current density of 0.5 A g(-1). Besides, rate performance of this sample is also excellent, indicating that this sample is promising in electrochemical supercapacitors.

引用

页码：6643 / 6648

页数：6

共 46 条

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Aggregation-based crystal growth and microstructure development in natural iron oxyhydroxide biomineralization products [J].