Densification by Compaction as an Effective Low‐Cost Method to Attain a High Areal Lithium Storage Capacity in a CNT@Co3O4 Sponge |
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Authors: | Yijun Chen Yunsong Wang Zhipeng Wang Mingchu Zou Hui Zhang Wenqi Zhao Muhammad Yousaf Liusi Yang Anyuan Cao Ray P S Han |
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Institution: | 1. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, China;2. Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin, China |
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Abstract: | Achieving a high areal capacity is essential for the transfer of outstanding laboratory electrode results to commercial applications and also to ensure there exists a capacity matched cathode and anode for a properly tuned battery. Despite intensive efforts, most electrode materials exhibit areal capacities lower than that of the graphite anodes (4 mA h cm?2). An effective and low‐cost approach is reported to attain a high areal capacity via an intense densification by compacting a porous carbon nanotube sponge grafted with Co3O4 nanoparticles. The hybrid sponge can be compacted to a large degree (up to a tenfold densification) while still keeping its structural integrity and the 3D porous network. This method allows achieving a mass loading of up ?to 14.3 mg cm?2 and an areal capacity of 12 mA h cm?2 (at a current density of 200 mA g?1) together with a gravimetric capacity of >800 mA h g?1. This densification by compaction approach offers an effective and low‐cost strategy to develop high mass loading and areal capacity electrodes for practical energy storage systems. |
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Keywords: | areal capacity areal mass loading carbon nanotube sponges Co3O4 lithium ion batteries |
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