Synergistic dual conversion reactions assisting Pb-S electrochemistry for energy storage.
basic_science · Level V
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- Record sourced from PubMed, PMID 35286210.
- Also identified by DOI 10.1073/pnas.2118675119 and PMC identifier 8944771.
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Abstract
SignificanceBased on the analysis of three thermodynamic parameters of various M-S systems (solubility of metal sulfides [M<sub>x</sub>S<sub>y</sub>] in aqueous solution, volume change of the metal-sulfur [M-S] battery system, and the potential of S/M<sub>x</sub>S<sub>y</sub> cathode redox couple), an aqueous Pb-S battery operated by synergistic dual conversion reactions (cathode: S⇄PbS, anode: Pb<sup>2+</sup>⇄PbO<sub>2</sub>) has been officially reported. Benefitting from the inherent insolubility of PbS and a conversion-type counter electrode, the aqueous Pb-S battery exhibited two advantages: it is shuttle effect free and has a dendrite-free nature. Moreover, the practical value of the Pb-S battery was further certified by the prototype S|Pb(NO<sub>3</sub>)<sub>2</sub>ǁZn(NO<sub>3</sub>)<sub>2</sub>|Zn hybrid cell, which afforded an energy density of 930.9 Wh kg<sup>-1</sup><sub>sulfur</sub>.