Ultrathin Mesoporous NiCo<sub>2</sub>O<sub>4</sub> Nanosheets Supported on Ni Foam as Advanced Electrodes for Supercapacitors

Advanced Functional Materials - Tập 22 Số 21 - Trang 4592-4597 - 2012
Changzhou Yuan1,2, Jiaoyang Li1, Linrui Hou1, Xiaogang Zhang3, Laifa Shen3, Xiong Wen Lou2
1Anhui Key Laboratory of Metal Materials and Processing, School of materials Science and Engineering, Anhui University of technology, Màanshan, 243002, P. R. China
2School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
3College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P. R. China.

Tóm tắt

AbstractA facile two‐step method is developed for large‐scale growth of ultrathin mesoporous nickel cobaltite (NiCo2O4) nanosheets on conductive nickel foam with robust adhesion as a high‐performance electrode for electrochemical capacitors. The synthesis involves the co‐electrodeposition of a bimetallic (Ni, Co) hydroxide precursor on a Ni foam support and subsequent thermal transformation to spinel mesoporous NiCo2O4. The as‐prepared ultrathin NiCo2O4 nanosheets with the thickness of a few nanometers possess many interparticle mesopores with a size range from 2 to 5 nm. The nickel foam supported ultrathin mesoporous NiCo2O4 nanosheets promise fast electron and ion transport, large electroactive surface area, and excellent structural stability. As a result, superior pseudocapacitive performance is achieved with an ultrahigh specific capacitance of 1450 F g−1, even at a very high current density of 20 A g−1, and excellent cycling performance at high rates, suggesting its promising application as an efficient electrode for electrochemical capacitors.

Từ khóa


Tài liệu tham khảo

10.1007/978-1-4757-3058-6

10.1038/nmat2297

10.1038/nmat2612

10.1039/c1ra00342a

10.1039/C0NR00423E

10.1039/B811548F

10.1002/anie.200351691

10.1002/smll.201100534

Wei T. Y., 2009, Adv. Mater., 21, 1

10.1039/c1jm10758e

10.1007/s100089900091

10.1039/c2cc31418e

10.1002/adfm.200701383

Tarasevich M. R., 1982, Electrodes of Conductive Metallic Oxides Part A, 227

10.1002/adfm.201102860

10.1016/j.electacta.2011.05.067

Yuan C. Z., 2012, Energy Environ. Sci.

10.1002/anie.200460937

10.1021/nl061576a

10.1038/nmat1782

10.1021/jp900028t

10.1088/0022-3727/22/8/026

10.1006/jssc.2000.8749

10.1021/la9609128

10.1016/0368-2048(94)02238-0

10.1088/0022-3727/22/8/026

10.1016/S0169-4332(00)00378-0

10.1039/c2jm15863a

10.1039/c1dt10397k

Thông tin
Thông tin xuất bản

Advanced Functional Materials

Tập 22 Số 21

4592-4597

Thông tin tác giả