Polymer hetero-electrolyte enabled solid-state 2.4-V Zn/Li hybrid batteries

Ze Chen, Tairan Wang, Zhuoxi Wu, Yue Hou, Ao Chen, Yanbo Wang, Zhaodong Huang, Oliver G. Schmidt, Minshen Zhu (), Jun Fan () and Chunyi Zhi ()
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Ze Chen: City University of Hong Kong
Tairan Wang: City University of Hong Kong
Zhuoxi Wu: City University of Hong Kong
Yue Hou: City University of Hong Kong
Ao Chen: City University of Hong Kong
Yanbo Wang: City University of Hong Kong
Zhaodong Huang: City University of Hong Kong
Oliver G. Schmidt: TU Chemnitz
Minshen Zhu: TU Chemnitz
Jun Fan: City University of Hong Kong
Chunyi Zhi: City University of Hong Kong

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract The high redox potential of Zn0/2+ leads to low voltage of Zn batteries and therefore low energy density, plaguing deployment of Zn batteries in many energy-demanding applications. Though employing high-voltage cathode like spinel LiNi0.5Mn1.5O4 can increase the voltages of Zn batteries, Zn2+ ions will be immobilized in LiNi0.5Mn1.5O4 once intercalated, resulting in irreversibility. Here, we design a polymer hetero-electrolyte consisting of an anode layer with Zn2+ ions as charge carriers and a cathode layer that blocks the Zn2+ ion shuttle, which allows separated Zn and Li reversibility. As such, the Zn‖LNMO cell exhibits up to 2.4 V discharge voltage and 450 stable cycles with high reversible capacity, which are also attained in a scale-up pouch cell. The pouch cell shows a low self-discharge after resting for 28 days. The designed electrolyte paves the way to develop high-voltage Zn batteries based on reversible lithiated cathodes.

Date: 2024
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DOI: 10.1038/s41467-024-47950-w

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