Background:: Cobalt oxide nanocubes have garnered significant attention as potential supercapacitor electrodes due to their unique structural and electrochemical properties. The spent lithium-ion batteries (LiBs) are considered as zero-cost source for cobalt oxide production. Objective:: The aim of this work is to recover cobalt oxide from spent LiBs and study its electrochemical performance as a supercapacitor electrode material. Method:: This study uses an electrodeposition method to obtain cobalt oxide honeycomb-like anodes coated on Ni foam substrates from spent Li-ion batteries for supercapacitors applications. The effect of annealing temperature on the cobalt oxide anode has been carefully investigated; 450 ºC annealing temperature results in nanocubes on the surface of the cobalt oxide electrode. X-ray diffraction confirmed the formation of the Co3O4-NiO electrode. Results:: The Co3O4-NiO nanocubes electrode has shown a high specific capacitance of 1400 F g-1 at 1 A g-1 and high capacitance retention of ~96 % after 2250 cycles at a constant current density of 10 A g-1 compared to 900 F g-1 at 1 A g-1 as for prepared Co3O4 honeycomb. Conclusion:: This strategy proves that the paramount importance of Co3O4-NiO nanocubes, meticulously synthesized at elevated temperatures, as a supremely effective active material upon deposition onto transition metal foam current collectors, establishing their indispensability for supercapacitor applications.

Zinab Hassanien Bakr

Eslam Atef Abdelaziz Aboelazm

Cheng Seong Khe

Gomaa Abdelgawad Mohammed Ali

Kwok Feng Chong

Current Nanoscience

CURRENT NANOSCIENCE 发表 (A) 权威/迷你评论，和 (B) 由专家撰写的原创研究和亮点，涵盖纳米科学和纳米技术的最新进展。代表了该领域的所有方面，包括纳米结构、纳米气泡、纳米液滴和纳米流体。还涵盖了纳米科学在物理学、材料科学、化学、合成、环境科学、电子学、生物医学纳米技术、生物医学工程、生物技术、医学和制药中的应用。该杂志对所有涉及纳米科学及其应用和基础科学、化学、物理、材料科学、工程和医学领域的研究都是必不可少的。CURRENT NANOSCIENCE 还欢迎提交关于纳米科学和纳米技术的以下主题的投稿：纳米电子学和光子学高级纳米材料纳米加工和测量纳米生物技术和纳米医学用于能量传感器和执行器的纳米技术计算纳米科学和技术。

Current Nanoscience publishes authoritative and mini-reviews, as well as original research and highlights written by experts, covering the latest advancements in nanoscience and nanotechnology. The journal represents all aspects of the field, including nanostructures, nanobubbles, nanodroplets, and nanofluids. It also addresses the applications of nanoscience in physics, materials science, chemistry, synthesis, environmental science, electronics, biomedical nanotechnology, biomedical engineering, biotechnology, medicine, and pharmaceuticals. This journal is essential for all research involving nanoscience and its applications, as well as foundational studies in chemistry, physics, materials science, engineering, and medicine. Current Nanoscience also welcomes submissions on the following topics related to nanoscience and nanotechnology: nanoelectronics and photonics, advanced nanomaterials, nanofabrication and measurement, nanobiotechnology and nanomedicine, nanotechnology for energy sensors and actuators, and computational nanoscience and technology.

《Current Nanoscience》发表权威性和迷你评论，以及由专家撰写的原创研究和亮点，涵盖纳米科学和纳米技术的最新进展。该期刊代表了该领域的所有方面，包括纳米结构、纳米气泡、纳米液滴和纳米流体。此外，还探讨了纳米科学在物理学、材料科学、化学、合成、环境科学、电子学、生物医学纳米技术、生物医学工程、生物技术、医学和制药中的应用。该杂志对所有涉及纳米科学及其应用的研究，以及基础科学、化学、物理、材料科学、工程和医学领域的研究都是必不可少的。《Current Nanoscience》还欢迎关于纳米科学和纳米技术的以下主题的投稿：纳米电子学和光子学、高级纳米材料、纳米加工和测量、纳米生物技术和纳米医学、用于能量传感器和执行器的纳米技术、计算纳米科学和技术。

Category	Quartile
材料科学	4
材料科学, 生物工程与应用微生物	4
材料科学, 材料科学综合	4
材料科学, 纳米科技	4

Recycling the Spent Lithium-ion Battery into Nanocubes Cobalt Oxide Supercapacitor Electrode

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