In-situ self-assembly robust defected graphene wrapped silicon/nanorod carbon for high-performance binder-free Li ion battery
In-situ self-assembly robust defected graphene wrapped silicon/nanorod carbon for high-performance binder-free Li ion battery
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原位自组装坚固的缺陷石墨烯包裹硅/纳米棒碳用于高性能无粘合剂锂离子电池
DOI：
10.1016/j.matlet.2022.132636
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发表时间：
2022-06
影响因子：
3
通讯作者：
Honglai Liu
中科院分区：
文献类型：
--
作者：
Xinrui Li;Haiping Su;Cheng Ma;Yuchen Cong;Jian Wang;Hongzhen Lin;Yazhuo Shang;Honglai Liu
·利用蒸发诱导自组装方法有利于制备大规模电极薄膜。· 3D导电多孔网络为Si膨胀提供空隙并加速锂离子传输。·无粘结剂的Si/NRC@DG使容量保持稳定。·Si/NRC@DG//LiFePO 4全电池表现出优异的电化学性能。低成本的高容量硅电极被认为是取代石墨阳极的未来锂离子电池有前途的阳极材料。本论文通过蒸发诱导自组装方法制备了一种用于高锂离子存储的硅/纳米棒碳（Si/NRC@DG）包裹的石墨烯缺陷层。结果表明，纳米棒和缺陷石墨烯形成的快速导电网络缩短了电子/锂离子到达Si纳米颗粒的路径，提高了利用率。同时，独特的三维纳米结构适应Si的大体积膨胀，浸没电解质并促进有效的锂离子扩散。结果，如此合成的Si/NRC@DG电极在100次循环后在0.1 A g-1下表现出669 mA h g-1的显著容量。再加上LiFePO 4阴极，组装的全电池能够提供126 mA h g −1的初始容量，为实现高能锂离子电池提供了机会。
• Utilization of evaporation-induced self-assembling method benefits to prepare the large scalable electrode film. • 3D conductive porous network provides voids for Si expansion and accelerates lithium ion transport. • The binder-free Si/NRC@DG stabilizes the capacity retention. • The Si/NRC@DG//LiFePO 4 full cell exhibits excellent electrochemical performance. High capacity silicon electrode with low cost is deemed as the promising anode material for the future Li-ion batteries with the replacement of graphite anode. In this work, robust defected graphene layers wrapped silicon/nanorod carbon (Si/NRC@DG) is synthesized through evaporation-induced self-assembly method for high lithium ion storage. Results show that the rapid conductive network formed by nanorods and defected graphene shorten the electron/lithium ion pathway to reach Si nanoparticles, enhancing the utilization. Meanwhile, the unique three-dimensional nano-architecture accommodates the large volumetric expansion of Si, immerses the electrolyte and facilitates efficient lithium ion diffusion. As a result, the so-synthesized Si/NRC@DG electrode exhibits a remarkable capacity of 669 mA h g −1 at 0.1 A g −1 after 100 cycles. Coupled with LiFePO 4 cathode, the assembled full cell is capable of offering an initial capacity of 126 mA h g −1 , providing opportunities for realizing high energy lithium ion batteries.
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影响因子：
8.7
作者：
Md. Monirul Islam;Irfan Sardar;M. Shahbaz;X. Vo
通讯作者：
Md. Monirul Islam;Irfan Sardar;M. Shahbaz;X. Vo
DOI：
10.1002/celc.201300103
发表时间：
2014-01
期刊：
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影响因子：
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DOI：
10.1002/advs.202104685
发表时间：
2022-03
期刊：
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子：
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作者：
Mu Y;Han M;Wu B;Wang Y;Li Z;Li J;Li Z;Wang S;Wan J;Zeng L
通讯作者：
Zeng L
影响因子：
17.1
作者：
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Xin Zhao;C. Hayner;M. Kung;H. Kung
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影响因子：
10
作者：
S. Zhao;M. Li;X. Wu;S.H. Yu;W. Zhang;J. Luo;J. Wang;Y. Geng;Q. Gou;K. Sun
通讯作者：
K. Sun