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Your search keyword '"Cao, Dianxue"' showing total 901 results
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901 results on '"Cao, Dianxue"'

52. Reversible Protonated Electrolyte Additive Enabling Dendrites‐Free Zn Metal Anode with High Depth of Discharge.

Author

Wang, Yuao, Wang, Tiantian, Mao, Yiyang, Li, Zhuo, Yu, Huiying, Su, Mingyu, Ye, Ke, Cao, Dianxue, and Zhu, Kai

Subjects
HYDROGEN evolution reactions, ANODES, METALS, DENDRITIC crystals, AMINO acids, ELECTROLYTES
Abstract

Aqueous zinc ion batteries (AZIBs) have stimulated extensive attention due to their environmental friendliness and low cost. Unfortunately, the inevitable dendrite growth and corrosion on the zinc (Zn) anode severely hinder the practical application of AZIBs. Herein, an amino acid containing an imidazole group is introduced as an effective additive to address these issues. The dynamic conversion of amino acid and protonated amino acid creates a pH buffer function that regulates solution pH in real time, inhibits hydrogen evolution reaction (HER), and eliminates notorious by‐products. In addition, the protonated amino acid is preferentially adsorbed on the Zn anode, preventing contact of the active water with the Zn surface and promoting homogeneous Zn deposition. Thus, the amino acid‐based electrolyte promotes dendrite free plating/stripping with a Coulombic efficiency up to 99.67% and cycle lifetime of 2600 h. In particular, a depth of discharge of up to 87% can be achieved with an ultra‐high areal capacity of 24 mAh cm−2. The developed Zn||CVO full cell also exhibits better electrochemical performance than that without additives. This work provides an effective and convenient approach for safe and efficient Zn‐ion batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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66. Recent Advances in the Electro‑Oxidation of Urea for Direct Urea Fuel Cell and Urea Electrolysis

Author

Ke, Ke, Wang, Gang, Cao, Dianxue, Wang, Guoxiong, Olivucci, Massimo, Editor-in-Chief, Wong, Wai-Yeung, Editor-in-Chief, Bayley, Hagan, Series Editor, Hughes, Greg, Series Editor, Hunter, Christopher A., Series Editor, Hwang, Seong-Ju, Series Editor, Ishihara, Kazuaki, Series Editor, Kirchner, Barbara, Series Editor, Krische, Michael J., Series Editor, Larsen, Delmar, Series Editor, Lehn, Jean-Marie, Series Editor, Luque, Rafael, Series Editor, Siegel, Jay S., Series Editor, Thiem, Joachim, Series Editor, Venturi, Margherita, Series Editor, Wong, Chi-Huey, Series Editor, Wong, Henry N.C., Series Editor, Yam, Vivian Wing-Wah, Series Editor, Yan, Chunhua, Series Editor, You, Shu-Li, Series Editor, and Shao, Minhua, editor

Published
2020
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89. Rational design of a low-cost, simple technology and high-performance CoNi/Co3O4 as a catalyst in sodium borohydride electro-oxidation reaction.

Author

Liu, Kaixuan, Lu, Borong, Cui, Ronghang, Yin, Jinling, Zhu, Kai, Wang, Guiling, Cao, Dianxue, and Ye, Ke

Subjects
SODIUM borohydride, FOAM, ELECTROLYTIC oxidation, ACTIVATION energy, UNIFORM spaces, HYDROTHERMAL synthesis
Abstract

To improve the complexity and low catalytic performance and reduce the high cost of the traditional electrode preparation process for the sodium borohydride electro-oxidation reaction (BOR), in this work, a self-supported and efficient electrode material grown on nickel foam (CoNi/Co3O4/NF) was successfully designed using a simple hydrothermal synthesis method accompanied by the electrodeposition process. Benefiting from the three-dimensional nanoarray structure of CoNi/Co3O4/NF and the uniform distribution of Co and Ni modulating active sites by electrodeposition, the catalytic activity towards NaBH4 exhibits high efficiency. CoNi/Co3O4 exhibits excellent catalytic performance (up to 2157 mA cm−2 in 2 mol L−1 NaOH and 0.3 mol L−1 NaBH4), a high electrochemically active surface area (62.5 cm−2), and a low activation energy (15.56 kJ mol−1). The CoNi/Co3O4/NF electrode was further investigated on a direct sodium borohydride–hydrogen peroxide fuel cell (DBHPFC), which exhibited a maximum power density of 108.5 mW cm−2 and excellent stability. The excellent performance is mainly due to its unique nanoarray structure and electrodeposition distribution of Co and Ni active sites, which increases the electrochemical surface area and enhances the contact between the electrode and the electrolyte. [ABSTRACT FROM AUTHOR]

Published
2024
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