Search

Your search keyword '"Shao, Guangjie"' showing total 517 results
Start Over Author "Shao, Guangjie"
517 results on '"Shao, Guangjie"'

26. Strong and Hierarchical Ni(OH) 2 /Ni/rGO Composites as Multifunctional Catalysts for Excellent Water Splitting.

Author

Wang, Lixin, Song, Ailing, Lu, Yue, Duanmu, Manman, Ma, Zhipeng, Qin, Xiujuan, and Shao, Guangjie

Subjects
OXYGEN evolution reactions, HYDROGEN evolution reactions, METAL catalysts, WATER electrolysis, CATALYSTS, ELECTRIC conductivity, SUPERGRAVITY
Abstract

The lack of efficient and non-precious metal catalysts poses a challenge for electrochemical water splitting in hydrogen and oxygen evolution reactions. Here, we report on the preparation of growing Ni(OH)2 nanosheets in situ on a Ni and graphene hybrid using supergravity electrodeposition and the hydrothermal method. The obtained catalyst displays outstanding performance with small overpotentials of 161.7 and 41 mV to acquire current densities of 100 and 10 mA cm−2 on hydrogen evolution reaction, overpotentials of 407 and 331 mV to afford 100 and 50 mA cm−2 on oxygen evolution reaction, and 10 mA·cm−2 at a cell voltage of 1.43 V for water splitting in 1 M KOH. The electrochemical activity of the catalyst is higher than most of the earth-abundant materials reported to date, which is mainly due to its special hierarchical structure, large surface area, and good electrical conductivity. This study provides new tactics for enhancing the catalytic performance of water electrolysis. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

27. Long‐life lithium batteries enabled by a pseudo‐oversaturated electrolyte.

Author

Yu, Youchun, Wang, Simeng, Zhang, Juyan, Qian, Weiwei, Zhang, Nana, Shao, Guangjie, Bian, Haiyan, Liu, Yuwen, and Zhang, Lan

Subjects
ELECTROLYTES, POLYELECTROLYTES, SOLID electrolytes, LONGEVITY, SOLVATION, LITHIUM cells, CATHODES
Abstract

The specific energy of Li metal batteries (LMBs) can be improved by using high‐voltage cathode materials; however, achieving long‐term stable cycling performance in the corresponding system is particularly challenging for the liquid electrolyte. Herein, a novel pseudo‐oversaturated electrolyte (POSE) is prepared by introducing 1,1,2,2‐tetrafluoroethyl‐2,2,3,3‐tetrafluoropropyl ether (TTE) to adjust the coordination structure between diglyme (G2) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Surprisingly, although TTE shows little solubility to LiTFSI, the molar ratio between LiTFSI and G2 in the POSE can be increased to 1:1, which is much higher than that of the saturation state, 1:2.8. Simulation and experimental results prove that TTE promotes closer contact of the G2 molecular with Li+ in the POSE. Moreover, it also participates in the formation of electrolyte/electrode interphases. The electrolyte shows outstanding compatibility with both the Li metal anode and typical high‐voltage cathodes. Li||Li symmetric cells show a long life of more than 2000 h at 1 mA cm−2, 1 mAh cm−2. In the meantime, Li||LiNi0.8Co0.1Mn0.1O2 (NCM811) cell with the POSE shows a high reversible capacity of 134.8 mAh g−1 after 900 cycles at 4.5 V, 1 C rate. The concept of POSE can provide new insight into the Li+ solvation structure and in the design of advanced electrolytes for LMBs. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

28. Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides.

Author

Chen, Ling, Lu, Yue, Duanmu, Manman, Zhao, Xin, Song, Shenglu, Duan, Liyue, Ma, Zhipeng, Song, Ailing, and Shao, Guangjie

Subjects
OXYGEN evolution reactions, CATALYTIC activity, GRAPHENE oxide, ELECTRON transport, HYDROXIDES, GRAPHENE, CHARGE transfer
Abstract

NiFe-layered double hydroxides (NiFe-LDH) have been reported to possess exceptional oxygen evolution reaction (OER) activity. However, maintaining the stability of high activity over a long time remains a critical challenge that needs to be addressed for their practical application. Here, we report a custom-sized deep recombination of 2D graphene oxide with NiFe-LDH (NiFe-LDH/GO/NF) through a simple electrodeposition method that improves OER activity and achieves excellent stability. The excellent performance of the catalyst mainly comes from the three-phase interface and electron transport channel dredged by the three-dimensional structure constructed by the deep composite, which can not only significantly reduce its charge and electron transfer resistance, improving the material conductivity, but it also effectively increases the specific surface area, inhibits aggregation, and exposes rich active sites. In addition, GO with good conductivity not only supports NiFe-LDH well but also increases the heterogeneous interface, putting the NiFe-LDH/GO composites in close contact with Ni foam and increasing the electrocatalytic stability of the NiFe-LDH/GO/NF. The experimental results show that the overpotential of NiFe-LDH/20,000GO/NF is only 295 mV at a current density of 100 mA cm−2; the Tafel slope is 52 mV dec−1, and the charge transfer resistance (Rct) is only 0.601 Ω in 1 M KOH. This indicates that GO has excellent potential to assist in constructing geometric and electronic structures of NiFe-LDH in long-term applications. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

35. Porous ZnP matrix for long‐lifespan and dendrite‐free Zn metal anodes

Author

Lei, Xinyue, primary, Ma, Zhipeng, additional, Bai, Lei, additional, Wang, Lei, additional, Ding, Yali, additional, Song, Shenglu, additional, Song, Ailing, additional, Dong, Haifeng, additional, Tian, Hao, additional, Tian, Huajun, additional, Meng, Xiangtong, additional, Liu, Hao, additional, Sun, Bing, additional, Shao, Guangjie, additional, and Wang, Guoxiu, additional

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results