Aqueous alternating electrolysis prolongs electrode lifespans under harsh operation conditions

Jie Liang, Jun Li, Hongliang Dong, Zixiaozi Li, Xun He, Yan Wang, Yongchao Yao, Yuchun Ren, Shengjun Sun, Yongsong Luo, Dongdong Zheng, Jiong Li, Qian Liu, Fengming Luo, Tongwei Wu (), Guang Chen (), Xuping Sun () and Bo Tang ()
Additional contact information
Jie Liang: Shandong Normal University
Jun Li: University of Electronic Science and Technology of China
Hongliang Dong: Center for High Pressure Science and Technology Advanced Research
Zixiaozi Li: University of Electronic Science and Technology of China
Xun He: University of Electronic Science and Technology of China
Yan Wang: University of Electronic Science and Technology of China
Yongchao Yao: University of Electronic Science and Technology of China
Yuchun Ren: University of Electronic Science and Technology of China
Shengjun Sun: Shandong Normal University
Yongsong Luo: Shandong Normal University
Dongdong Zheng: Shandong Normal University
Jiong Li: Chinese Academy of Sciences
Qian Liu: Chengdu University
Fengming Luo: Sichuan University
Tongwei Wu: University of Electronic Science and Technology of China
Guang Chen: Shaanxi University of Science & Technology
Xuping Sun: Shandong Normal University
Bo Tang: Shandong Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-15

Abstract: Abstract It is vital to explore effective ways for prolonging electrode lifespans under harsh electrolysis conditions, such as high current densities, acid environment, and impure water source. Here we report alternating electrolysis approaches that realize promptly and regularly repair/maintenance and concurrent bubble evolution. Electrode lifespans are improved by co-action of Fe group elemental ions and alkali metal cations, especially a unique Co2+-Na+ combo. A commercial Ni foam sustains ampere-level current densities alternatingly during continuous electrolysis for 93.8 h in an acidic solution, whereas such a Ni foam is completely dissolved in ~2 h for conventional electrolysis conditions. The work not only explores an alternating electrolysis-based system, alkali metal cation-based catalytic systems, and alkali metal cation-based electrodeposition techniques, and beyond, but demonstrates the possibility of prolonged electrolysis by repeated deposition-dissolution processes. With enough adjustable experimental variables, the upper improvement limit in the electrode lifespan would be high.

Date: 2024
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DOI: 10.1038/s41467-024-50519-2

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