2020
DOI: 10.1021/acsenergylett.0c01564
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Nitrogen-Doped CoSe2 as a Bifunctional Catalyst for High Areal Capacity and Lean Electrolyte of Li–S Battery

Abstract: The sluggish redox kinetics of polysulfides and difficult oxidation process of Li2S severely hinder practical application of Li–S batteries under high sulfur loading and a low electrolyte dosage. To address these issues, we develop a bifunctional catalyst by manipulation of anion N doping in CoSe2 (N-CoSe2). Theoretical simulation results uncover that an introduced N element into CoSe2 could form a shorter Co–N bond, create a higher charge number of the Co central atom, bring new defect levels, and induce the … Show more

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Cited by 231 publications
(180 citation statements)
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“…2a) [25]. This result is in accordance with most studies on Li-S batteries, in which cathode hosts are sulfurated at 155 °C [40][41][42]. In the case of the 300S, strong peaks at 23.8°, 24.1°, 24.4°, and 28.1° are indexed to the (212), ( 130), (012), and (132) planes of crystalline S (PDF: 04-007-2069), respectively.…”
Section: Characterization Of the 155s And 300ssupporting
confidence: 89%
“…2a) [25]. This result is in accordance with most studies on Li-S batteries, in which cathode hosts are sulfurated at 155 °C [40][41][42]. In the case of the 300S, strong peaks at 23.8°, 24.1°, 24.4°, and 28.1° are indexed to the (212), ( 130), (012), and (132) planes of crystalline S (PDF: 04-007-2069), respectively.…”
Section: Characterization Of the 155s And 300ssupporting
confidence: 89%
“…The cells with the MCN/S cathode can still retain 691.1 mA h g −1 , which means a very low average capacity degradation (0.019%) per cycle, which is much higher than those of recent reported literatures based on different catalysts. [7,22,[45][46][47] This outstanding cyclicity shows the superior cycling stability of MCN/S at high current densities. To further demonstrate its practicality, Li-S pouch cells were assembled and operated at the conditions required for commercial highenergy Li-S batteries.…”
Section: Resultsmentioning
confidence: 95%
“…Reproduced with permission. [139] Copyright 2020, American Chemical Society. Schematic of cation doping.…”
Section: Intrinsic Defectmentioning
confidence: 99%
“…To this end, Wang et al innovatively developed a dual-directional N-CoSe 2 electrocatalyst via anion doping strategy. [139] Of note, the bond lengths of various sulfur species (Li c) Reproduced with permission. [137] Copyright 2020, Wiley-VCH.…”
Section: Anion-doped Compoundmentioning
confidence: 99%
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