Conformal Coating of Cobalt-Nickel Layered Double Hydroxides Nanoflakes on Carbon Fibers for High-performance Electrochemical Energy Storage Supercapacitor Devices
Type
ArticleAuthors
Warsi, Muhammad FarooqShakir, Imran
Shahid, Muhammad
Sarfraz, Mansoor M.
Nadeem, Muhammad Tahir
Gilani, Zaheer Abbas
KAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Date
2014-07Permanent link to this record
http://hdl.handle.net/10754/563013
Metadata
Show full item recordAbstract
High specific capacitance coupled with the ease of large scale production is two desirable characteristics of a potential pseudo-supercapacitor material. In the current study, the uniform and conformal coating of nickel-cobalt layered double hydroxides (CoNi0.5LDH,) nanoflakes on fibrous carbon (FC) cloth has been achieved through cost-effective and scalable chemical precipitation method, followed by a simple heat treatment step. The conformally coated CoNi0.5LDH/FC electrode showed 1.5 times greater specific capacitance compared to the electrodes prepared by conventional non-conformal (drop casting) method of depositing CoNi0.5LDH powder on the carbon microfibers (1938 Fg-1 vs 1292 Fg-1). Further comparison of conformally and non-conformally coated CoNi0.5LDH electrodes showed the rate capability of 79%: 43% capacity retention at 50 Ag-1 and cycling stability 4.6%: 27.9% loss after 3000 cycles respectively. The superior performance of the conformally coated CoNi0.5LDH is mainly due to the reduced internal resistance and fast ionic mobility between electrodes as compared to non-conformally coated electrodes which is evidenced by EIS and CV studies. © 2014 Elsevier Ltd.Citation
Warsi, M. F., Shakir, I., Shahid, M., Sarfraz, M., Nadeem, M., & Gilani, Z. A. (2014). Conformal Coating of Cobalt-Nickel Layered Double Hydroxides Nanoflakes on Carbon Fibers for High-performance Electrochemical Energy Storage Supercapacitor Devices. Electrochimica Acta, 135, 513–518. doi:10.1016/j.electacta.2014.05.020Sponsors
The authors would like extend their sincere appreciation to the Deanship of Scientific Research at King Saudi University for its funding of this research through the Research Group Project no RGP-VPP-312.Publisher
Elsevier BVJournal
Electrochimica Actaae974a485f413a2113503eed53cd6c53
10.1016/j.electacta.2014.05.020