Polymer hetero-electrolyte enabled solid-state 2.4-V Zn/Li hybrid batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38702298.
- Also identified by DOI 10.1038/s41467-024-47950-w and PMC identifier 11068732.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The high redox potential of Zn<sup>0/2+</sup> 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 LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> can increase the voltages of Zn batteries, Zn<sup>2+</sup> ions will be immobilized in LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> once intercalated, resulting in irreversibility. Here, we design a polymer hetero-electrolyte consisting of an anode layer with Zn<sup>2+</sup> ions as charge carriers and a cathode layer that blocks the Zn<sup>2+</sup> 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.