Cobalt Oxide Arrays Anchored to Copper Foam as Efficient Binder-free Anode for Lithium Ion Batteries |
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Authors: | Dr Hangning Liu Runmeng Liu Yingjun Ma Lin Wang Changhui Sun Tong Xu Dr Haidong Liu Dr Jie Wang |
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Institution: | 1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109 PR China;2. School of Technology, University of Nottingham Ningbo, Ningbo, 315199 PR China;3. Department of Chemistry, Ångström Laboratory, Uppsala University, Uppsala, 75121 Sweden |
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Abstract: | The development of lithium-ion batteries with simplified assembling steps and fast charge capability is crucial for current battery applications. In this study, we propose a simple in-situ strategy for the construction of high-dispersive cobalt oxide (CoO) nanoneedle arrays, which grow vertically on a copper foam substrate. It is demonstrated that this nanoneedle CoO electrodes provide abundant electrochemical surface area. The resulting CoO arrays directly act as binder-free anodes in lithium-ion batteries with the copper foam functioning as the current collector. The highly-dispersed feature of the nanoneedle arrays enhances the effectiveness of active materials, leading to outstanding rate capability and superior long-term cycling stability. These impressive electrochemical properties are attributed to the highly-dispersed self-standing nanoarrays, the advantages of binder-free constituent, and the high exposed surface area of the copper foam substrate compared to copper foil, which enrich active surface area and facilitate charge transfer. The proposed approach to prepare binder-free lithium-ion battery anodes streamlines the electrode fabrication steps and holds significant promise for the future development of the battery industry. |
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Keywords: | CoO nanoneedle arrays copper foam collector binder-free electrode lithium ion battery electrochemical performance |
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