Facile Preparation and Performances of Ni, Co, and Al Layered Double Hydroxides for Application in High-Performance Asymmetric Supercapacitors
Source abstract
Abstract
Layered double hydroxides (LDHs) are widely studied as electrode materials of supercapacitors (SCs) owing to their specific composition and morphology and plentiful electrochemically active sites. Especially, nickel cobalt hydroxides can achieve an outstanding electrochemical performance as electrode materials of SCs because of the synergy effect between Ni and Co. Herein, ternary LDHs including Ni, Co, and Al (NiCo2Alx-LDHs) with different stoichiometric ratios are synthesized by a facile method to further research the influences of Al on the morphology and electrochemical performances of LDHs. Results show that the NiCo2Al0.5-LDHs electrode delivers a high specific capacitance (1260 F g–1 at 0.5 A g–1) and an excellent capacitance retention (81.5% of initial capacitance). Besides, an asymmetric supercapacitor (ASC) assembled with a NiCo2Al0.5-LDHs cathode and an activated carbon (AC) anode (NiCo2Al0.5-LDHs//AC ASC) exhibits a high energy density of 39 Wh kg–1 with remarkable cycling stability (91.7% of initial capacitance retention after 6000 cycles at 5 A g–1).
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Layered Double Hydroxides Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, School of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
Key Laboratory of Materials Processing and Mold of Ministry of Education, Zhengzhou University, Zhengzhou, Henan 450001, China
College of Material Science and Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
School of Chemistry & Material Engineering, Xinxiang College, Xinxiang, Henan 453003, China
Funding
Natural Science Foundation of??Hunan Province · National Natural Science Foundation of China · Specialized Research Fund for the Doctoral Program of Higher Education
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