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210 results on '"He, Jianjiang"'

20. Constructing an ion‐oriented channel on a zinc electrode through surface engineering.

Author

Liu, Xin, Wang, Kun, Liu, Ying, Zhao, Fuhua, He, Jianjiang, Wu, Hao, Wu, Jianfei, Liang, Han‐Pu, and Huang, Changshui

Subjects
ZINC electrodes, AQUEOUS electrolytes, DENDRITIC crystals, POWER density, ENGINEERING, ZINC
Abstract

The inherent shortcomings of a zinc anode in aqueous zinc‐ion batteries (ZIBs) such as zinc dendrites and side reactions severely limit their practical application. Herein, to address these issues, an ion‐oriented transport channel constructed by graphdiyne (GDY) nanowalls is designed and grown in situ on the surface of a zinc electrode. The vertically stacked GDY nanowalls with a unique hierarchical porous structure and mechanical properties form a nanomesh‐like interface on the zinc electrode, acting as an ion‐oriented channel, which can efficiently confine the segmented growth of zinc metal in microscopic regions of hundreds of nanometers. In those microscopic regions, the uniform domain current density is effortlessly maintained compared with a large surface area, thereby inhibiting zinc dendrites effectively. Besides, due to the presence of the ion‐oriented channel, the modified zinc anode demonstrates long‐term stable zinc plating/stripping performance for more than 600 h at 1 mAh cm−2 in an aqueous electrolyte. In addition, full‐cells coupled with MnO2 show high specific capacity and power density, as well as excellent cycling stability with a capacity retention of 82% after 5000 cycles at 1 A g−1. This work provides a feasible and accessible surface engineering approach to modify the electrode interface for confined and dendrite‐free zinc deposition in aqueous ZIBs. [ABSTRACT FROM AUTHOR]

Published
2023
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26. Germanium‐Carbdiyne: A 3D Well‐Defined sp‐Hybridized Carbon‐Based Material with Superhigh Li Storage Property.

Author

Yang, Ze, Ren, Xin, Song, Yuwei, Li, Xiaodong, Zhang, Chunfang, Hu, Xiuli, He, Jianjiang, Li, Jiazhu, and Huang, Changshui

Subjects
CARBON-based materials, POROUS materials, BAND gaps, LITHIUM, STORAGE, QUANTUM information science
Abstract

Carbyne delivers various excellent properties for the existence of the larger number of sp‐hybridized carbon atoms. Here, a 3D well‐defined porous carbon material germanium‐carbdiyne (Ge‐CDY) which is comprised of only sp‐hybridized carbon atoms bridging by Ge atoms has been developed and investigated. The unique diamond‐like structure constructed by linear butadiyne bonds and sp3‐hybridized Ge atoms ensures the stability of Ge‐CDY. The large percentage of conjugated alkyne bonds composed of sp‐C guarantees the good conductivity and the low band gap, which were further confirmed experimentally and theoretically, endowing Ge‐CDY with the potential in electrochemical applications. The well‐defined 3D carbon skeleton of Ge‐CDY provides abundant uniform nanopores, which is suitable for metal ions storage and diffusion. Further half‐cell evaluation also demonstrated Ge‐CDY exhibited an excellent performance in lithium storage. All those indicating sp‐hybridized carbon‐based materials can exhibit great potential to possess excellent properties and be applied in the field of energy, electronic, and so on. [ABSTRACT FROM AUTHOR]

Published
2023
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