High-capacity charge storage electrodes based on nickel oxide and nickel–cobalt double hydroxide nanocomposites on 3D nickel foam prepared by sparking and electrodeposition

© 2020 Elsevier B.V. In the present work, nickel oxide (NiO) and nickel-cobalt double hydroxide (NiCo-DH) nanocomposites on Ni foams were synthesized for the first time and systemically optimized for charge storage applications. NiO nanoparticles were sparked on Ni foams followed by the electrodepos...

وصف كامل

محفوظ في:
التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Yaowamarn Chuminjak, Pisith Singjai, Adisorn Tuantranont, Chakrit Sriprachuabwong, Anurat Wisitsoraat
التنسيق: دورية
منشور في: 2020
الموضوعات:
الوصول للمادة أونلاين:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85085655564&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/70547
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الوصف
الملخص:© 2020 Elsevier B.V. In the present work, nickel oxide (NiO) and nickel-cobalt double hydroxide (NiCo-DH) nanocomposites on Ni foams were synthesized for the first time and systemically optimized for charge storage applications. NiO nanoparticles were sparked on Ni foams followed by the electrodeposition of NiCo-DH with various times ranging from 50 to 400 s. Structural characterization results by electron microscopy, Raman spectroscopy and X-ray spectroscopy revealed that 5–10 nm sparked NiO nanoparticles acted as the nucleation seeds for the formation of smaller NiCo-DH nanostructures resulting in an increase of surface area at a moderate electrodeposition times of 100 s and induced metallic Ni and Co species on the composite layer. From electrochemical measurements, the optimal electrodeposition time of 100 s provided a moderate mass loading of 0.6 mg cm−2 and a high specific capacity of 938 C g−1 (1876 F g−1) @ 1 A g−1 with a good rate capability of 69% (647.5 C g−1) @ 20 A g−1. Additionally, a decent capacity retention of 97% was attained after 1000 cycles @ 4 A g−1. The results could be attributed to high surface capacity of NiO + NiCo-DH nanocomposite structures and high electrical conductivity with a low effective series resistance of 0.39 Ω.