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A bifunctional additive bi(4-flurorophenyl) sulfone for enhancing the stability and safety of nickel-rich cathode based cells
Liu, Lili1; Gao, Weiqun2; Cui, Yingyue3; Chen, Shimou4
2020-04-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume820Pages:8
Abstract

LiNi0.8Co0.1Mn0.1O2 is regarded as a promising cathode material in lithium ion batteries (LIB) for its high specific capacity and low cost. While the short cycle life, severe cathode deterioration as well as the poor safety characteristic hinder its wide application. In this work, we introduce a novel additive, bis(4-fluorophenyl) sulfone (BFS), which enhances the capacity retention from 75.19% to 83.04% after 100 cycles at the rate of 1C. Moreover, linear sweep voltammetry (LSV), cyclic voltammetry (CV), galvanostatic test, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy were carried out to further demonstrate the superiority of this additive. We prove that this additive can decompose preferentially and form a desirable cathode electrolyte interface on the positive cathode according to the LSV and TEM results. Furthermore, the smooth and robust film not only can effectively enhance the cycling stability, but also can prevent the cathode from severe deterioration. We deduce a proper function mechanism of this additive. This additive can be oxidized at state of charge into two sulfonates, which prevent the carbonate electrolyte from decomposition. This mechanism has been proved by DFT calculations. In addition, the overcharging performance also has been tested in this work by charging cells till 5 V. (C) 2019 Elsevier B.V. All rights reserved.

KeywordHigh Voltage Electrolyte Sulfone-based Additive Ni-rich Cathode Overcharge Protection
DOI10.1016/j.jallcom.2019.153069
Language英语
WOS KeywordLithium Ion Batteries ; Overcharge Protection ; Electrochemical Properties ; Lini0.8co0.1mn0.1o2 ; Performance ; Challenges ; Mechanism ; Behavior ; Metal ; Oxide
Funding ProjectNational Key Projects for Fundamental Research and Development of China[2017YFB0102200]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key Projects for Fundamental Research and Development of China
WOS IDWOS:000507854700001
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/38872
Collection中国科学院过程工程研究所
Corresponding AuthorChen, Shimou
Affiliation1.Beijing Technol & Business Univ, Sch Sci, China Natl Light Ind, Key Lab Cosmet, Beijing 100048, Peoples R China
2.East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China
3.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300401, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liu, Lili,Gao, Weiqun,Cui, Yingyue,et al. A bifunctional additive bi(4-flurorophenyl) sulfone for enhancing the stability and safety of nickel-rich cathode based cells[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,820:8.
APA Liu, Lili,Gao, Weiqun,Cui, Yingyue,&Chen, Shimou.(2020).A bifunctional additive bi(4-flurorophenyl) sulfone for enhancing the stability and safety of nickel-rich cathode based cells.JOURNAL OF ALLOYS AND COMPOUNDS,820,8.
MLA Liu, Lili,et al."A bifunctional additive bi(4-flurorophenyl) sulfone for enhancing the stability and safety of nickel-rich cathode based cells".JOURNAL OF ALLOYS AND COMPOUNDS 820(2020):8.
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