Eom, Subin Jung, Moo Young Park, Jihye Son, Ji-Won Ahn, JeongHyeon Kim, Sung Won Yun, Yong Ju Jun, Yongseok 2026-01-26T06:00:12Z 2026-01-26T06:00:12Z 2026-01-12 2026-01 2352-152X https://pubs.kist.re.kr/handle/201004/154078 Climate change urgently necessitates the development of sustainable energy solutions alongside efficient energy storage devices. Among these, supercapacitors have emerged as promising candidates due to their fast charge/discharge capabilities and exceptional long-term cycle stability. In this study, NiCoFe-layered double hydroxide (NiCoFe-LDH) was successfully synthesized via electrodeposition onto copper nanowires (Cu NWs), which were prepared through electrochemical anodization followed by thermal reduction. The optimal Fe ratio in NiCoFe-LDH@Cu NW was determined through various electrochemical tests, with the 3-NiCoFe-LDH@Cu NW (Ni:Co:Fe = 5:3:3) exhibiting superior electrochemical performance, achieving a capacity of 130.20 μAh cm−2 at a current density of 3.0 mA cm−2. To evaluate practical applicability, an asymmetric supercapacitor (ASC) was fabricated using 3-NiCoFe-LDH@Cu NW as the positive electrode and 1-MXene@CuO NW as the negative electrode. The ASC demonstrated excellent energy storage performance, delivering an energy density of 1.69 mWh cm−2 at a power density of 19.27 mW cm−2, outperforming recently reported devices. Furthermore, the ASC retained 80.7 % of its initial capacity after 8000 cycles at 10 mA cm−2, with a coulombic efficiency of 102.9 %, highlighting its remarkable stability and efficiency. English Elsevier BV Enhanced electronic structure and electrochemical active area of ternary NiCoFe-LDH and Cu nanowire composites for superior energy storage Article 10.1016/j.est.2025.119690 1 Journal of Energy Storage, v.144 Journal of Energy Storage 144 N scie scopus 001640999200001 2-s2.0-105024552284 Energy & Fuels Energy & Fuels Article LAYERED DOUBLE HYDROXIDES OXYGEN EVOLUTION CHARGE STORAGE PERFORMANCE NI CO SUPERCAPACITORS CARBON Asymmetric supercapacitor NiCoFe-LDH Cu nanowire MXene Pseudocapacitor