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295 results on '"Xu, Junmin"'

10. Dendrite suppression by scalable acid treatment of zinc metal anodes for aqueous zinc-ion batteries.

Author

Lyu, Huanlin, Cui, Suihan, Huang, Chao, Ruan, Qingdong, Zhang, Xiaolin, Xu, Junmin, Xiong, Fangyu, Li, Dan, and Chu, Paul K.

Abstract

Aqueous zinc-ion batteries (ZIBs) are desirable energy storage devices because of their low cost, safety, abundant Zn reserve, and environmental friendliness. However, Zn dendrite growth remains the main reason limiting the life span of ZIBs. Herein, a quick, simple, and scalable hydrochloric acid (HCl) treatment is designed to suppress the formation of Zn dendrites on Zn metal anodes. Scanning electron microscopy and atomic force microscopy reveal that the initial surface structure of the Zn metal anode determines the subsequent plating/stripping behavior. By soaking the Zn foil in HCl for 5 s (HCl-5 Zn), microgrooves are formed on the surface, but longer immersion destroys the special structure. This special microgroove structure homogenizes the electric field on the surface of the Zn plate, giving rise to more uniform Zn deposition. Compared to the pristine and over-processed Zn electrodes, HCl-5 Zn shows less Zn nucleation and smaller plating overpotentials resulting in suppression of Zn dendrites. Furthermore, HCl-5 Zn tends to deposit on the (002) plane of Zn to improve the cycling stability of the cell compared to the (001) plane of Zn. The symmetrical cell composed of the HCl-5 Zn anode exhibits small voltage hysteresis and excellent cycling stability. The cycling characteristics and low voltage polarization are improved, as demonstrated by the assembled symmetrical and full batteries comprising the K0.5V2O5@CC cathode. Moreover, the strategy is suitable for flexible batteries with hydrogel as the electrolyte. The results reveal a simple strategy to minimize dendrite formation and provide insights into the commercial development of ZIBs. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Single Crystal Growth of the New Pressure-induced-superconductor CrAs via Chemical Vapor Transport

Author

Zhu, Xiangde, Ling, Langsheng, Han, Yuyan, Xu, Junmin, Wang, Yongjian, Zhang, Hongwei, Zhang, Changjin, Pi, Li, and Zhang, Yuheng

Subjects
Condensed Matter - Superconductivity
Abstract

Mono-arsenide CrAs, endures a helical anti-ferromagnetic order transition at~ 265 K under ambient pressure. Recently, pressure-induced-superconductivity was discovered vicinity to the helical anti-ferromagnetic order in CrAs[Wei Wu et al., Nature Communications 5, 5508 (2014).]. However, the size of crystal grown via tin flux method is as small as 1 mm in longest dimension. In this work, we report the single crystal growth of CrAs with size of 1 * 5 * 1 mm3 via chemical vapor transport method and its physical properties., Comment: 9 pages, 3 figures

Published
2016
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16. Potassium-Rich Iron Hexacyanoferrate/Carbon Cloth Electrode for Flexible and Wearable Potassium-Ion Batteries

Author

Li, Xinyue, Zhang, Xiaolin, Xu, Junmin, Duan, Zhixia, Xu, Yue, Zhang, Xiaosheng, Zhang, Lingling, Wang, Ye, Chu, Paul K., Li, Xinyue, Zhang, Xiaolin, Xu, Junmin, Duan, Zhixia, Xu, Yue, Zhang, Xiaosheng, Zhang, Lingling, Wang, Ye, and Chu, Paul K.

Abstract

The fast development of flexible and wearable electronics increases the demand for flexible secondary batteries, and the emerging high-performance K-ion batteries (KIBs) have shown immense promise for the flexible electronics due to the abundant and cost-effective potassium resources. However, the implementation of flexible cathodes for KIBs is hampered by the critical issues of low capacity, rapid capacity decay with cycles, and limited initial Coulombic efficiency. To address these pressing issues, a freestanding K-rich iron hexacyanoferrate/carbon cloth (KFeHCF/CC) electrode is designed and fabricated by cathodic deposition. This innovative binder-free and self-supporting KFeHCF/CC electrode not only provides continuous conductive channels for electrons, but also accelerates the diffusion of potassium ions through the active electrode-electrolyte interface. Moreover, the nanosized potassium iron hexacyanoferrate particles limit particle fracture and pulverization to preserve the structure and stability during cycling. As a result, the K-rich KFeHCF/CC electrode shows a reversible discharging capacity of 110.1 mAh g-1 at 50 mA g-1 after 100 cycles in conjunction with capacity retention of 92.3% after 1000 cycles at 500 mA g-1. To demonstrate the commercial feasibility, a flexible tubular KIB is assembled with the K-rich KFeHCF/CC electrode, and excellent flexibility, capacity, and stability are observed. In this study, a flexible and freestanding K-rich KFeHCF/CC electrode is prepared by cathodic deposition to form the cathode in a flexible K-ion battery (KIB). The flexible and wearable tubular KIB constructed with the potassium-rich iron hexacyanoferrate cathode shows excellent flexibility, high capacity, and good stability. The results show that the electrode materials have a large potential in flexible potassium-ion energy storage devices.image

Published
2024

24. Simulation on the Qualitative Relationship Between Carrier Movement and Eddy Current Interfering Magnetic Field in Geomagnetic Navigation

Author

Li, Chi, Yang, Binfeng, Xu, Junmin, Sun, Huan, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Ruediger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Sun, Jiadong, editor, Yang, Changfeng, editor, and Guo, Shuren, editor

Published
2018
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25. Error Compensation of Geomagnetic Field Measurement Used in Geomagnetic Navigation

Author

Yang, Binfeng, Li, Chi, Xu, Junmin, Sun, Huan, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Ruediger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Sun, Jiadong, editor, Yang, Changfeng, editor, and Guo, Shuren, editor

Published
2018
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