兰州大学机构库
Synergy Between Surface Confinement and Heterointerfacial Regulations with Fast Electron/Ion Migration in InSe-PPy for Sodium-Ion Storage
Chen, Penglei1,2; Pei, Xiangdong3; Liu, Ruyi4; Wang, Jinbao2; Lu, Yuemeng4; Gu, Huaiqiang5; Tan, Lei6; Du, Xin2; Li, Dan2; Wang, Luxiang1
2023-09-10
Online publication date2023-09
Source PublicationSmall   Impact Factor & Quartile
ISSN1613-6810 ; 1613-6829
page numbers10
AbstractLayered indium selenide (InSe) is a new 2D semiconductor material with high carrier mobility, widely adjustable bandgap, and high ductility. However, its ion storage behavior and related electrochemical reaction mechanism are rarely reported. In this study, InSe nanoflakes encapsulated in conductive polypyrrole (InSe@PPy) are designed in consideration of restraining the severe volume change in the electrochemical reaction and increasing conductivity via in situ chemical oxidation polymerization. Density functional theory calculations demonstrate that the construction of heterostructure can generate an internal electric field to accelerate electron transfer via additional driving forces, offering synergistically enhanced structural stability, electrical conductivity, and Na+ diffusion process. The resulting InSe@PPy composite shows outstanding electrochemical performance in the sodium ion batteries system, achieving a high reversible capacity of 336.4 mA h g-1 after 500 cycles at 1 A g-1 and a long-term cyclic stability with capacity of 274.4 mA h g-1 after 2800 cycles at 5 A g-1. In particular, the investigation of capacity fluctuation within the first cycling reveals the alternating significance of intercalation and conversion reactions and evanescent alloying reaction. The combined reaction mechanism of insertion, conversion, and alloying of InSe@PPy is revealed by in situ X-ray diffraction, ex situ electrochemical impedance spectroscopy, and transmission electron microscopy. The synthesis of polypyrrole-encapsulated indium selenide nanoflakes by chemical vapor transport method is reported. The reaction mechanism and the alternating significance of intercalation and conversion reactions and evanescent of alloying reactions are demonstrated. The theoretical calculations manifest that the heterointerface accelerates electron/Na+ transfer and reduces the Na+ diffusion barrier. The synergy between heterointerface and structural confinement boosts electrochemical properties.image
Keywordanode materials density functional theory (DFT) calculations InSe polypyrrole coating sodium-ion batteries
PublisherWILEY-V C H VERLAG GMBH
DOI10.1002/smll.202304892
Indexed BySCIE
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:001061729200001
Original Document TypeArticle ; Early Access
PMID 37691021
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/568722
Collection兰州大学
Corresponding AuthorLi, Dan; Wang, Luxiang
Affiliation
1.Xinjiang Univ, Coll Chem, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830017, Peoples R China;
2.Zhengzhou Univ, Coll Chem, Zhengzhou 450001, Henan, Peoples R China;
3.Shanxi Supercomp Ctr, Lvliang 033000, Peoples R China;
4.Natl Supercomp Ctr Zhengzhou, Zhengzhou 450001, Peoples R China;
5.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China;
6.Lanzhou Univ, Inst Theoret Phys, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Chen, Penglei,Pei, Xiangdong,Liu, Ruyi,et al. Synergy Between Surface Confinement and Heterointerfacial Regulations with Fast Electron/Ion Migration in InSe-PPy for Sodium-Ion Storage[J]. Small,2023.
APA Chen, Penglei.,Pei, Xiangdong.,Liu, Ruyi.,Wang, Jinbao.,Lu, Yuemeng.,...&Wang, Luxiang.(2023).Synergy Between Surface Confinement and Heterointerfacial Regulations with Fast Electron/Ion Migration in InSe-PPy for Sodium-Ion Storage.Small.
MLA Chen, Penglei,et al."Synergy Between Surface Confinement and Heterointerfacial Regulations with Fast Electron/Ion Migration in InSe-PPy for Sodium-Ion Storage".Small (2023).
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