Large Scale Synthesis of NiCo Layered Double Hydroxides for Superior Asymmetric Electrochemical Capacitor

We report a new environmentally-friendly synthetic strategy for large-scale preparation of 16 nm-ultrathin NiCo based layered double hydroxides (LDH). The Ni 50 Co 50 -LDH electrode exhibited excellent specific capacitance of 1537 F g −1 at 0.5 A g −1 and 1181 F g −1 even at current density as high...

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Bibliographic Details
Published in:Scientific reports 2016-01, Vol.6 (1), p.18737-18737, Article 18737
Main Authors: Li, Ruchun, Hu, Zhaoxia, Shao, Xiaofeng, Cheng, Pengpeng, Li, Shoushou, Yu, Wendan, Lin, Worong, Yuan, Dingsheng
Format: Article
Language:English
Subjects:
639/301/299
639/301/299/161/891
639/638/161
Capacitance
Cobalt
Electrical conductivity
Electrochemistry
Electrodes
Humanities and Social Sciences
Hydroxides
Lithium
multidisciplinary
Science
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Summary:We report a new environmentally-friendly synthetic strategy for large-scale preparation of 16 nm-ultrathin NiCo based layered double hydroxides (LDH). The Ni 50 Co 50 -LDH electrode exhibited excellent specific capacitance of 1537 F g −1 at 0.5 A g −1 and 1181 F g −1 even at current density as high as 10 A g −1 , which 50% cobalt doped enhances the electrical conductivity and porous and ultrathin structure is helpful with electrolyte diffusion to improve the material utilization. An asymmetric ultracapacitor was assembled with the N-doped graphitic ordered mesoporous carbon as negative electrode and the NiCo LDH as positive electrode. The device achieves a high energy density of 33.7 Wh kg −1 (at power density of 551 W kg −1 ) with a 1.5 V operating voltage.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep18737