P-block tin single atom catalyst for improved electrochemistry in a lithium–sulfur battery: a theoretical and experimental study

Abstract

Main group metals are routinely considered as catalytically inactive hence never employed for optimizing the lithium-sulfur electrochemistry. Herein, density function theory calculations reveal that atomically dispersed tin on nitrogen doped...

Subnanometric CoSn clusters embedded in N-doped carbon nanoboxes (SN-CoSn@C NBs) realize high efficiency adsorption–conversion of polysulfides

“…Meanwhile, the UVvis curves also conrm the stronger adsorption effect from the SN-CoSn@C NB sample. 30,31 The highresolution Co 2p spectrum in Fig. 3b indicates the existence of Co 0 , Co 2+ and Co 3+ .…”

“…The appearance of M–N bonds suggests the bonding of Co/Sn with N in M–N x active sites. 30,31 The high-resolution Co 2p spectrum in Fig. 3b indicates the existence of Co 0 , Co 2+ and Co 3+ .…”

“…This implies that LiPS reduction is easier on the surface of G-CoN 4 -Co 3 Sn compared to that on the G-CoN 4 surface, which is benecial for improving S utilization. 30,44 This conrms the advantage of subnanoscale catalysts with single atomic sites and sites in atomic clusters for use in Li-S batteries.…”

Atomically distributed asymmetrical five-coordinated Co–N5 moieties on N-rich doped C enabling enhanced redox kinetics for advanced Li–S batteries

“…4d), the CoN5 SA/NC modied separator demonstrates a superior rate performance. 8,9,33,[35][36][37][38][39][40][41] The cycling stability of the Li-S batteries with various different separators was investigated at 0.5C (Fig. 4e and S21, ESI †).…”

Toward Theoretical Capacity and Superhigh Power Density for Potassium–Selenium Batteries via Facilitating Reversible Potassiation Kinetics

“…Current cathode candidates include layered transition metal oxides, , polyanionic compounds, , Prussian blue analogues, , and organic materials . Chalcogen elements (O, S, Se, Te) belong to an emerging cathode family, which display high theoretical capacity by counting 2e – charge transfer per chalcogen atom. Therefore, emerging potassium–chalcogen batteries employing chalcogen cathodes are attracting tremendous attention .…”