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Establishing reaction networks in the 16-electron sulfur reduction reaction

The sulfur reduction reaction (SRR) plays a central role in high-capacity lithium sulfur (Li-S) batteries. The SRR involves an intricate, 16-electron conversion process featuring multiple lithium polysulfide intermediates and reaction branches1–3. Establishing the complex reaction network is essential for rational tailoring of the SRR for improved Li-S batteries, but represents a daunting challenge4–6. Herein we systematically investigate the electrocatalytic SRR to decipher its network using the nitrogen, sulfur, dual-doped holey graphene framework as a model electrode to understand the role of electrocatalysts in acceleration of conversion kinetics. Combining cyclic voltammetry, in situ Raman spectroscopy and density functional theory calculations, we identify and directly profile the key intermediates (S8, Li2S8, Li2S6, Li2S4 and Li2S) at varying potentials and elucidate their conversion pathways. Li2S4 and Li2S6 were predominantly observed, in which Li2S4 represents the ....

Edn Engl , Nano Lett , J Energy Chem , Energy Fuels , Energy Mater , Energy Environ , Energy Chem ,

Review and Perspectives of Sulfonated Poly(ether ether ketone) Proton Exchange Membrane for Vanadium Flow Batteries

Review and Perspectives of Sulfonated Poly(ether ether ketone) Proton Exchange Membrane for Vanadium Flow Batteries
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South Korea , El Magri , Nano Lett , J Hydrogen Energy , Energy Fuels , J Energy Res , Al Research , Energy Mater , Energy Environ , J Energy Storage , Cbl Properties , J Energy Chem , Gmm Properties , Energy Stor , Energy Combust , Today Energy , Power Sources , Energy Storage , Comparing Nafion , Herve Bang , Solid State ,