A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries

A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries

Redox kinetics of lithium polysulfides (LiPSs) conversion and poor electrical conductivity of sulfur during the charge-discharge process greatly inhibit the commercialization of high-performance lithium–sulfur (Li–S) batteries. Herein, we synthesized CoSe<sub>2</sub> porous hollow flower...

Full description

Bibliographic Details
Main Authors: Wei Xu, Qikai Wu, Zhongmei Che, Bin Fan, Dengke Zhao, Shuai Wang, Aixia Han, Ligui Li
Format: Article
Language:English
Published: MDPI AG 2021-02-01
Series:Catalysts
Subjects:
transition metal selenide
catalysis
electrical conductivity
lithium sulfur batteries
Online Access:https://www.mdpi.com/2073-4344/11/2/273
id doaj-9b9b8208ceee453fb38248d84af49478
record_format Article
spelling doaj-9b9b8208ceee453fb38248d84af494782021-02-19T00:02:22ZengMDPI AGCatalysts2073-43442021-02-011127327310.3390/catal11020273A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur BatteriesWei Xu0Qikai Wu1Zhongmei Che2Bin Fan3Dengke Zhao4Shuai Wang5Aixia Han6Ligui Li7Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaGuangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaShandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaGuangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaGuangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaShandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaChemical Engineering College, Qinghai University, Xining 810016, ChinaGuangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaRedox kinetics of lithium polysulfides (LiPSs) conversion and poor electrical conductivity of sulfur during the charge-discharge process greatly inhibit the commercialization of high-performance lithium–sulfur (Li–S) batteries. Herein, we synthesized CoSe<sub>2</sub> porous hollow flowers (CoSe<sub>2</sub>-PHF) by etching and further selenizing layered double hydroxide, which combined the high catalytic activity of transition metal compound and high electrical conductivity of selenium. The obtained CoSe<sub>2</sub>-PHF can efficiently accelerate the catalytic conversion of LiPSs, expedite the electron transport, and improve utilization of active sulfur during the charge-discharge process. As a result, with CoSe<sub>2</sub>-PHF/S-based cathodes, the Li–S batteries exhibited a reversible specific capacity of 955.8 mAh g<sup>−1</sup> at 0.1 C and 766.0 mAh g<sup>−1</sup> at 0.5 C, along with a relatively small capacity decay rate of 0.070% per cycle within 400 cycles at 1 C. Even at the high rate of 3 C, the specific capacity of 542.9 mAh g<sup>−1</sup>can be maintained. This work enriches the way to prepare porous composites with high catalytic activity and electrical conductivity as sulfur hosts for high-rate, long-cycle rechargeable Li−S batteries.https://www.mdpi.com/2073-4344/11/2/273transition metal selenidecatalysiselectrical conductivitylithium sulfur batteries
collection DOAJ
language English
format Article
sources DOAJ
author Wei Xu
Qikai Wu
Zhongmei Che
Bin Fan
Dengke Zhao
Shuai Wang
Aixia Han
Ligui Li
spellingShingle Wei Xu
Qikai Wu
Zhongmei Che
Bin Fan
Dengke Zhao
Shuai Wang
Aixia Han
Ligui Li
A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries
Catalysts
transition metal selenide
catalysis
electrical conductivity
lithium sulfur batteries
author_facet Wei Xu
Qikai Wu
Zhongmei Che
Bin Fan
Dengke Zhao
Shuai Wang
Aixia Han
Ligui Li
author_sort Wei Xu
title A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries
title_short A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries
title_full A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries
title_fullStr A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries
title_full_unstemmed A Novel Synthesizing Strategy of 3D Cose<sub>2</sub> Porous Hollow Flowers For High Performance Lithium–Sulfur Batteries
title_sort novel synthesizing strategy of 3d cose<sub>2</sub> porous hollow flowers for high performance lithium–sulfur batteries
publisher MDPI AG
series Catalysts
issn 2073-4344
publishDate 2021-02-01
description Redox kinetics of lithium polysulfides (LiPSs) conversion and poor electrical conductivity of sulfur during the charge-discharge process greatly inhibit the commercialization of high-performance lithium–sulfur (Li–S) batteries. Herein, we synthesized CoSe<sub>2</sub> porous hollow flowers (CoSe<sub>2</sub>-PHF) by etching and further selenizing layered double hydroxide, which combined the high catalytic activity of transition metal compound and high electrical conductivity of selenium. The obtained CoSe<sub>2</sub>-PHF can efficiently accelerate the catalytic conversion of LiPSs, expedite the electron transport, and improve utilization of active sulfur during the charge-discharge process. As a result, with CoSe<sub>2</sub>-PHF/S-based cathodes, the Li–S batteries exhibited a reversible specific capacity of 955.8 mAh g<sup>−1</sup> at 0.1 C and 766.0 mAh g<sup>−1</sup> at 0.5 C, along with a relatively small capacity decay rate of 0.070% per cycle within 400 cycles at 1 C. Even at the high rate of 3 C, the specific capacity of 542.9 mAh g<sup>−1</sup>can be maintained. This work enriches the way to prepare porous composites with high catalytic activity and electrical conductivity as sulfur hosts for high-rate, long-cycle rechargeable Li−S batteries.
topic transition metal selenide
catalysis
electrical conductivity
lithium sulfur batteries
url https://www.mdpi.com/2073-4344/11/2/273
work_keys_str_mv AT weixu anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT qikaiwu anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT zhongmeiche anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT binfan anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT dengkezhao anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT shuaiwang anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT aixiahan anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT liguili anovelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT weixu novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT qikaiwu novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT zhongmeiche novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT binfan novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT dengkezhao novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT shuaiwang novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT aixiahan novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
AT liguili novelsynthesizingstrategyof3dcosesub2subporoushollowflowersforhighperformancelithiumsulfurbatteries
_version_ 1724262089863725056

Similar Items