MnO 2 /MXene–Ti 3 C 2 T x flexible foam for use in lithium ion storage

As a new two-dimensional material, MXene has attracted extensive attention because of its unique structure and electrochemical properties. MXene-based self-supporting films have been widely studied due to their flexibility, light weight and lack of need for adhesives and conductive agents. In the pr...

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Veröffentlicht in:Materials advances 2021-07, Vol.2 (14), p.4772-4780
Hauptverfasser: Yan, Jingze, Yu, Lu, Wang, Donghua, Zhang, Wenyuan, Xiong, Zhihao, Nie, Tianshuo, Ji, Zhen, Yan, Xiaoqin
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container_end_page 4780
container_issue 14
container_start_page 4772
container_title Materials advances
container_volume 2
creator Yan, Jingze
Yu, Lu
Wang, Donghua
Zhang, Wenyuan
Xiong, Zhihao
Nie, Tianshuo
Ji, Zhen
Yan, Xiaoqin
description As a new two-dimensional material, MXene has attracted extensive attention because of its unique structure and electrochemical properties. MXene-based self-supporting films have been widely studied due to their flexibility, light weight and lack of need for adhesives and conductive agents. In the present work, we used facile ultrasonic and annealing methods to fabricate MnO 2 /MXene–Ti 3 C 2 T x foam hybrids for lithium storage. In the hybrid material, MnO 2 nanoparticles expand the MXene lamellar spacing, provide tunnels for lithium ion shuttling and accelerate the transport speed of lithium ions, thus improving the rate performance of the electrode materials. The existence of the MXene nanosheets can release the internal stress due to the volume expansion of MnO 2 during charging/discharging, reduce the electrode resistivity and improve the cycling stability of materials. The initial discharge capacity can reach 1203 mA h g −1 and the capacity can be maintained at about 600 mA h g −1 after 200 cycles. Moreover, the capacity of the electrode attenuates less at a large current and the capacity is about 350 mA h g −1 at 5 A g −1 .
doi_str_mv 10.1039/D1MA00488C
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title MnO 2 /MXene–Ti 3 C 2 T x flexible foam for use in lithium ion storage
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