Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 35    No. 9    September 2025

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Preparation of porous α-Ga2O3 nanowires by dealloying of Ga-based liquid metals to enhance cycling stability for lithium storage
Chang LUO1#, Zi-gang WANG1#, Yi-chao WANG2, Shuai-ju MENG3, Hui YU1, Wei-min ZHAO1, Chun-ling QIN1, Zhi-feng WANG1

1. “The Belt and Road Initiative” Advanced Materials International Joint Research Center of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China;
2. School of Science, RMIT University, Melbourne VIC 3001, Australia;
3. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China

Abstract:Ga2O3 is considered a potential anode material for next-generation lithium-ion batteries due to its high theoretical capacity and unique self-healing capability. To develop a novel preparation method and in-depth understanding of the electrochemical reaction mechanism of Ga2O3, a brand-new liquid-liquid dealloying strategy was exploited to construct porous α-Ga2O3 nanowire networks. Profiting from the well-designed porous structure, the material exhibits impressive cycling stability of a reversible capacity of 603.9 mA·h/g after 200 cycles at 1000 mA/g and a capacity retention of 125.2 mA·h/g after 100 cycles at 0.5C when assembling to Ga2O3//LiFePO4 full cells. The lithiation/delithiation reaction mechanism of the porous Ga2O3 anodes is further revealed by ex-situ Raman, XRD, TEM measurements, and density functional theoretical (DFT) calculations, which establishes a correlation between the electrochemical performance and the phase transition from α-Ga2O3 to β-Ga2O3 during cycling.

 

Key words: liquid metal dealloying; porous nanowires; Ga2O3; Li-ion battery; anode

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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