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A novel sulfur@void@hydrogel yolk-shell particle with a high sulfur content for volume-accommodable and polysulfide-adsorptive lithium-sulfur battery cathodes
Zhang, Min1; Zhu, Mengfei1; Zhong, Yan1; Han, Tianli1; Sun, Bai2; Zhu, Shuguang2; Gu, Cuiping1; Kong, Lingtao3; Zhang, Huigang4,5; Liu, Jinyun1
2020-11-06
Source PublicationNANOTECHNOLOGY
ISSN0957-4484
Corresponding AuthorGu, Cuiping(cpgu2008@mail.ahnu.edu.cn)
AbstractHigh-energy-density secondary batteries are required for many applications such as electric vehicles. Lithium-sulfur (Li-S) batteries are receiving broad attention because of their high theoretical energy density. However, the large volume change of sulfur during cycling, poor conductivity, and the shuttle effect of sulfides severely restrict the Li-storage performance of Li-S batteries. Herein, we present a novel core-shell nanocomposite consisting of a sulfur core and a hydrogel polypyrrole (PPy) shell, enabling an ultra-high sulfur content of about 98.4% within the composite, which greatly exceeds many other conventional composites obtained by coating sulfur onto some hosts. In addition, the void inside the core-shell structure effectively accommodates the volume change; the conductive PPy shell improves the conductivity of the composite; and PPy is able to adsorb polysulfides, suppressing the shuttle effect. After cycling for 200 cycles, the prepared S@void@PPy composite retains a stable capacity of 650 mAh g(-1), which is higher than the bare sulfur particles. The composite also exhibits a fast Li ion diffusion coefficient. Furthermore, the density functional theory calculations show the PPy shell is able to adsorb polysulfides efficiently, with a large adsorption energy and charge density transfer.
Keywordnanocomposite secondary battery stability capacity immobilizing polysulfide
DOI10.1088/1361-6528/abaa72
WOS KeywordDOPED POROUS CARBON ; SOL-GEL ; PERFORMANCE ; POLYPYRROLE ; COMPOSITES ; GRAPHENE ; NETWORK ; NANOCOMPOSITE ; NITROGEN ; STORAGE
Indexed BySCI
Language英语
Funding ProjectKey Research and Development Program of Wuhu[2019YF07] ; Science and Technology Major Project of Anhui Province[18030901093] ; Natural Science Research Project for Universities in Anhui Province[KJ2018ZD034] ; Natural Science Research Project for Universities in Anhui Province[KJ2019A0502] ; Key Research and Development Plan of Anhui Province[201904A07020070] ; Anhui Normal University[2020XJ48] ; Anhui Provincial Program for Innovation and Entrepreneurship of Returnees from Overseas[2019LCX005]
Funding OrganizationKey Research and Development Program of Wuhu ; Science and Technology Major Project of Anhui Province ; Natural Science Research Project for Universities in Anhui Province ; Key Research and Development Plan of Anhui Province ; Anhui Normal University ; Anhui Provincial Program for Innovation and Entrepreneurship of Returnees from Overseas
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000562276200001
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/42922
Collection中科院安徽光学精密机械研究所
Corresponding AuthorGu, Cuiping
Affiliation1.Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Lab Mol Based Mat, Key Lab Funct Mol Solids,Minist Educ, Wuhu 241000, Anhui, Peoples R China
2.Anhui Jianzhu Univ, Coll Environm & Energy Engn, Hefei 230601, Anhui, Peoples R China
3.Chinese Acad Sci, Inst Intelligent Machines, Hefei 230031, Anhui, Peoples R China
4.Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China
5.Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Min,Zhu, Mengfei,Zhong, Yan,et al. A novel sulfur@void@hydrogel yolk-shell particle with a high sulfur content for volume-accommodable and polysulfide-adsorptive lithium-sulfur battery cathodes[J]. NANOTECHNOLOGY,2020,31.
APA Zhang, Min.,Zhu, Mengfei.,Zhong, Yan.,Han, Tianli.,Sun, Bai.,...&Liu, Jinyun.(2020).A novel sulfur@void@hydrogel yolk-shell particle with a high sulfur content for volume-accommodable and polysulfide-adsorptive lithium-sulfur battery cathodes.NANOTECHNOLOGY,31.
MLA Zhang, Min,et al."A novel sulfur@void@hydrogel yolk-shell particle with a high sulfur content for volume-accommodable and polysulfide-adsorptive lithium-sulfur battery cathodes".NANOTECHNOLOGY 31(2020).
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