Structurally Stable Ni(OH)2 Composite with Super Long-term Cycling Life for Aqueous High-performance Supercapacitor |
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| Authors: | Huaiyan Wang Chunli Guo Xiaochuan Ren Yuyu Zhang QuanXin Shi Zhongchao Bai Nana Wang |
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| Institution: | 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 P.R. China;2. College of Texiles & Clothing, Qingdao University, Qingdao, Shandong, 266071 P.R. China;3. Instrumental Analysis Center of Taiyuan University of Technology, Taiyuan, Shanxi, 030024 PR China;4. Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Innovat Campus, North Wollongong, NSW, 2500 Australia |
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| Abstract: | We synthesized an electrochemical structurally stable composite electrode, containing Ni-doped Co(CO3)0.5OH ? 0.11H2O nanoneedles and nanoflake-/nanofrustum-like Ni(OH)2 with highly hydrophilic group, leading to enhanced rare performance. The electrode exhibits an outstanding ultra-long cycle life of more than 140,000 cycles. Specially, the assembled aqueous hybrid supercapacitor presents more than 80 % capacity retention even after 170,000 cycles and high energy density of 44.5 Wh kg?1. This work highlights a feasible strategy to design and develop high-efficiency electrodes via engineering on composition and nanostructure. |
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| Keywords: | Ni(OH)2 Ni-doped Co(CO3)0 5OH???0 11H2O ultra-long cycle life supercapacitor |
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