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291 results on '"Wang, Zhuyi"'

18. A 3 µm‐Ultrathin Hybrid Electrolyte Membrane with Integrative Architecture for All‐Solid‐State Lithium Metal Batteries.

Author

Liu, Kexin, Cheng, Hui, Wang, Zhuyi, Zhao, Yin, Lv, Yingying, Shi, Liyi, Cai, Xuesong, Cheng, Zhongling, Zhang, Haijiao, and Yuan, Shuai

Abstract

Ultrathin all‐solid‐state electrolytes with an excellent Li+ transport behavior are highly desirable for developing high‐energy‐density solid‐state lithium metal batteries. However, how to balance the electrochemical performance and their mechanical properties remains a huge challenge. Herein, an ultrathin solid electrolyte membrane with a thickness of only 3 µm and a weight of 11.7 g m−2 is well constructed by integrating individual functionalized organic with inorganic modules. Impressively, the optimized hybrid electrolyte membrane shows a set of merits including a high room‐temperature ionic conductivity of 1.77 × 10−4 S cm−1, large Li+ transference number of 0.65, and strong mechanical strength (strength of 29 MPa, elongation of 95%), as well as negligible thermal shrink at 180 °C. The analysis results reveal that the lithium sulfonate‐functionalized mesoporous silica nanoparticles in the membrane play a crucial role in the selective transport of Li+ through anion trapping and cation exchange. The pouch full cell is further assembled with a high‐voltage NCM cathode and thin lithium anode, which exhibits excellent long‐term cycling stability, outstanding rate performance at room temperature, and high safety against abused conditions. The current work provides an innovative strategy for achieving lithium metal batteries with ultrathin all‐solid‐state electrolytes. [ABSTRACT FROM AUTHOR]

Published
2024
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27. A simple and rapid route for synthesizing the nanosized g-C3N4 materials with narrow bandgap and their photocatalytic activity

Author

Zhang, Meihong, Fang, Yuqian, Yuan, Shuai, Shi, Liyi, Wang, Zhuyi, Wang, Yi, Zhu, Jiefang, Zhao, Yin, Zhang, Meihong, Fang, Yuqian, Yuan, Shuai, Shi, Liyi, Wang, Zhuyi, Wang, Yi, Zhu, Jiefang, and Zhao, Yin

Abstract

The graphitic carbon nitride (g-C3N4) materials with many intriguing properties have attracted much attention in photocatalysis. The photocatalytic activity of g-C3N4 is hindered by serious aggregation and limited exposed active sites. Herein is shown that nanosized g-C3N4 can be simply obtained by a superfast high-pressure homogenization approach. The high-pressure homogenization treatment can provide strong force to cut and/or to exfoliate the bulk g-C3N4 into nanosized g-C3N4 with good dispersion. Moreover, choosing different solvents during treatment can cause a different surface structure of as-prepared nanosized g-C3N4. In addition, the narrow bandgap properties, the high photogenerated charge carrier separation, and the transport abilities are achieved in as-prepared nanosized g-C3N4 because of the retaining conjugated C3N4 system. Specifically, the photocatalytic activities of as-prepared nanosized g-C3N4 have been significantly enhanced in terms of degradation of organic dye Rhodamine B (RhB) under visible light irradiation (10 times higher than that of bulk g-C3N4). These findings can provide a promising and simple approach to the exfoliation, nanonization, and surface functionalization of 2D layered materials.

Published
2023
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40. Boosting the Temperature Adaptability of Lithium Metal Batteries via a Moisture/Acid‐Purified, Ion‐Diffusion Accelerated Separator

Author

Zhang, Min, primary, Liu, Kexin, additional, Gan, Yichen, additional, Wang, Helin, additional, Liu, Fu, additional, Bai, Miao, additional, Tang, Xiaoyu, additional, Wang, Zhiqiao, additional, Li, Shaowen, additional, Shao, Ahu, additional, Zhou, Kefan, additional, Wang, Tianyu, additional, Wang, Zhuyi, additional, Yuan, Shuai, additional, and Ma, Yue, additional

Published
2022
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45. Enhanced Storage and Interface Structure Stability of NCM811 Cathodes for Lithium-Ion Batteries by Hydrophobic Fluoroalkylsilanes Modification

Author

Xue, Xiaoyin, Zhao, Yin, Yuan, Shuai, Shi, Liyi, Sun, Xiaoying, Wang, Zhuyi, Zhu, Jiefang, Xue, Xiaoyin, Zhao, Yin, Yuan, Shuai, Shi, Liyi, Sun, Xiaoying, Wang, Zhuyi, and Zhu, Jiefang

Abstract

The nickel-rich ternary-layered oxide LiNixCoyMn(1-x-y)O2 (NCM) cathode exhibits high reversible capacity and low cost; however, severe capacity fade and aggravated air degradation prohibit its widespread commercialization. Herein, the hydrophobic fluoroalkylsilane-modified NCM811 cathode materials are reported. To better understand the effects of electrochemical properties of lithium-ion batteries, a variety of characterization techniques and electrochemical methods are utilized to study the surface chemistry at the cathode/electrolyte interphase. The hydrophobic fluoroalkylsilanes-grafted NCM811 cathode materials suppress the formation of residual lithium even after 30 days in humid air. The fluoroalkylsilanes layer can also provide chemical stabilization to the NCM811 cathode materials by anchoring transition metals (TM) and suppressing TM dissolution during long immersion times in electrolytes. Moreover, the degree of improvement depends on the structure of the fluoroalkylsilanes, such as the number of F groups and the length of carbon chains. As a result, FAS17-modified NCM811 cathode materials after 30-day humid air exposure (humidity 70%) exhibit the greatest overall capacity retention of 74.2% after 200 charge/discharge cycles.

Published
2022
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