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Synthesis of Carbon nanotubes/Ni/NiAl2O4 on Nickel Foam for supercapacitor application

Title
Synthesis of Carbon nanotubes/Ni/NiAl2O4 on Nickel Foam for supercapacitor application
Author
LiuJin
Advisor(s)
Erfan Zal Nezhad
Issue Date
2017-08
Publisher
한양대학교
Degree
Master
Abstract
Supercapacitors as a new energy techonology have aroused much attention because of their wide application in electronic products and vehicle energy supply. Electrode materials are the key component for devices, which is important for the development of supercapacitors. As energy storage devices have attracted increasing attention in the recent years because of many advantages, including higher power density, longer cycle life and safety. Depended on the advantages, ECs is a fresh style of energy storage and transposition equipment, have very promising application in the future. Based on the charge storage mechanism, there are two different categories of supercapacitors including electrochemical double layer capacitors(EDLCs) and pseudocapacitors. The first one is based on the non-Faradaic act as separation in interface between the electrode and electrolyte. Second series are based on the Faradaic redox reaction of electroactive materials. Carbon materials are a class of ideal electrode materials for electrochemical capacitors due to the high surface area, electrical conductivity, and low cost. In recent years, with the discovery of fullerenes, carbon nanotubes and graphene, carbon nanomaterials have become the hotspot in this field. Among them, carbon nanotube (CNT)/Mixed transition metal oxides (MTMOs) owns excellent surfacially electrical charge transport properties, and maintains the individual characteristics of the original building blocks. demonstating an excellent synergy and great potential in new energy materials. A new binder-free electrode carbon nanotubes(CNTs)/Ni/NiAl2O4 have been synthesized by catalytic chemical vapor deposition(CVD) of acetylene over an Ni-Al layered double hydroxide(NiAl-LDH) compound. In the task, a dexterous hydrothermal method as the first step was reflected to grow stratify nanoflower-like NiAl layered double hydroxide (LDH) directly on 3D nickel foam (NF), Then used CVD let the Ni-Al layered double hydroxide are transformed into CNT/Ni/NiAl2O4.CNT/Ni/NiAl2O4 with a high specific capacitance of 436.6F·g-1 in the present of 1 A·g-1. The CNT/Ni/NiAl2O4 based supercapacitor exhibited excellent cycling stability with cycling stability 86% retention after 5000 cycles at 30 A·g-1. These outstanding characteristics of CNT/Ni/NiAl2O4 as an electrode material for Super capacitor, it has proven its promising applicability in the field of energy storage.
URI
http://hdl.handle.net/20.500.11754/33488http://hanyang.dcollection.net/common/orgView/200000431075
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > MECHANICAL CONVERGENCE ENGINEERING(융합기계공학과) > Theses (Ph.D.)
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