3D interwoven MXene networks fabricated by the assistance of bacterial celluloses as high-performance cathode material for rechargeable magnesium battery
3D interwoven MXene networks fabricated by the assistance of bacterial celluloses as high-performance cathode material for rechargeable magnesium battery
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细菌纤维素辅助制造的 3D 交织 MXene 网络作为可充电镁电池的高性能正极材料
DOI：
10.1016/j.apsusc.2020.146985
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发表时间：
2020-10
影响因子：
6.7
通讯作者：
Li Liquan
中科院分区：
文献类型：
--
作者：
Zhu Jinglian;Shi Rui;Liu Yana;Zhu Yunfeng;Zhang Jiguang;Hu Xiaohui;Li Liquan
在细菌纤维素（BC）的帮助下制备的三维编织Ti3C2MXene网络被用作可充电镁离子电池的正极材料，该材料具有令人印象深刻的比容量（在50 mA g - 1时为171 mA h g - 1）和良好的循环性能（100次循环后容量保持率为88%）。相比之下，纯ti3c2薄膜在50 mA g−1时仅显示出小于10 mA h g−1的可逆容量。与纯ti3c2膜（d = 1.4 nm）相比，三维交织Ti3C2MXene网络（BC/ ti3c2膜）具有更大的层间距（d = 1.8 nm），有利于镁的迁移，并通过DFT计算证明了这一点。通过FESEM图像观察到BC/ ti3c2薄膜表面多孔。而对于ti3c2薄膜，所有薄片堆叠在一起。正如预期的那样，镁离子在BC/ ti3c2薄膜中的扩散路径得到了优化。此外，恒流间歇滴定技术表明BC/ ti3c2膜的镁扩散系数比纯ti3c2膜大得多。因此，更大的层间距、优化的扩散路径和更大的镁扩散系数有助于提高电化学性能。此外，还研究了BC/ ti3c2膜对镁离子电池的作用机理。本研究为高性能mxene基正极材料的设计提供了新的思路。
3D interwoven Ti3C2MXene networks fabricated with the assistance of bacterial celluloses (BC) are used as a cathode material for rechargeable magnesium ion battery, which delivers an impressive specific capacity (171 mA h g−1at 50 mA g−1) and good cycling performance (88% capacity retention after 100 cycles). In contrast, pure Ti3C2film only shows a reversible capacity of less than 10 mA h g−1at 50 mA g−1. Compared to pure Ti3C2film (d = 1.4 nm), 3D interwoven Ti3C2MXene networks (BC/Ti3C2film) possess larger interlayer spacing (d = 1.8 nm), benefiting the magnesium migration, which is proved through DFT calculation. BC/Ti3C2film with porous surface is observed through FESEM image. While for Ti3C2film, all flakes stack together. As expected, the diffusion paths for magnesium ions are optimized in the BC/Ti3C2film. Besides, Galvanostatic Intermittent Titration Technique shows a much larger magnesium diffusion coefficient of BC/Ti3C2film than that of pure Ti3C2film. Therefore, the larger interlayer spacing, optimized diffusion paths and larger magnesium diffusion coefficient contribute to the high electrochemical performance. Moreover, the working mechanisms of magnesium ion battery equipped with BC/Ti3C2film are investigated. This work provides a new insight to design MXene-based cathode materials with high-performance.
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影响因子：
6.7
作者：
Mengyi Wu;Yujie Zhang;Ting Li;Zhongxue Chen;Shunan Cao;Fei Xu
通讯作者：
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影响因子：
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作者：
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DOI：
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发表时间：
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期刊：
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影响因子：
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作者：
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通讯作者：
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影响因子：
29.4
作者：
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通讯作者：
Meng-qiang Zhao;Xiuqiang Xie;Chang E. Ren;T. Makaryan;B. Anasori;Guoxiu Wang;Y. Gogotsi