Hydrothermal Synthesis of Binary Ni-Co Hydroxides and Carbonate Hydroxides as Pseudosupercapacitors

被引：72

作者：

Bastakoti, Bishnu Prasad ^{[1
]}

Kamachi, Yuichiro ^{[1
]}

Huang, Hou-Sheng ^{[2
]}

Chen, Lin-Chi ^{[2
]}

Wu, Kevin C-W ^{[3
]}

Yamauchi, Yusuke ^{[1
,4
,5
]}

机构：

[1] Natl Inst Mat Sci, World Premier Int WPI Res Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan

[2] Natl Taiwan Univ, Dept Bioind Mechatron Engn, Taipei 10617, Taiwan

[3] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan

[4] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

[5] Waseda Univ, Fac Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2013年 / 01期

关键词：

Hydrothermal synthesis; Nickel; Cobalt; Conducting materials; OXIDE; SUPERCAPACITOR; ELECTRODE; GRAPHENE; SURFACE; FILM;

D O I：

10.1002/ejic.201200939

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of binary Ni-Co hydroxides and Ni-Co carbonate hydroxides with various shapes and compositions was successfully synthesized by a one-step and reliable method assisted by an amphiphilic block copolymer. After thermal treatment at 200 degrees C, the as-prepared samples could be activated and their surface areas could be increased. With increasing Co content, the shapes of the final products changed from flower-to fiber-and plate-like structures. The synthesized binary Ni-Co sample with an optimized composition of Ni2+/Co2+ = 25:75 exhibited high surface area and a capacitance of 632 Fg(-1) at 5 mVs(-1) with negligible capacitance loss after 1000 cycles. The capacitance value of the binary Ni-Co sample is higher than that of Ni hydroxide itself, and this improved electrochemical performance is attributed to the binary Co2+/Co3+ and Ni2+/Ni3+ couples that afford rich faradic capacitance and enhanced conductivity.

引用

页码：39 / 43

页数：5

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