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An effective interface-regulating mechanism enabled by non-sacrificial additives for high-voltage nickel-rich cathode
Cui, Yingyue1; Wang, Yanlei2; Gu, Shijie1; Qian, Cheng2; Chen, Tianhua2; Chen, Shimou2; Zhao, Jianling1; Zhang, Suojiang2
2020-03-31
Source PublicationJOURNAL OF POWER SOURCES
ISSN0378-7753
Volume453Pages:9
Abstract

Recently, various electrolyte additives are used to reduce the negative impact on high voltage performance of the nickel-rich cathode (LiNixCoyMn1-x-yO2) (x >= 0.6). In this work, a selected additive, methyl diphenylphosphonate (MDPO), is applied to Li/LiNi0.8Co0.1Mn0.1O2(NCM811) half cells operating at high work voltages of 2.8-4.5 V. The electrochemical tests show that MDPO effectively widen the electrochemical window up to 5.0 V and stabilize the Coulombic efficiency, obtaining excellent capacity retention and low interface impedance. Different with the traditional additives, herein, our research confirms that the MDPO is a non-sacrificial additive which just tightly physical immobilized on the surface of NCM811 and stabilize the cathode/electrolyte interface, due to the fact that it doesn't oxidize within the whole working voltage range. This interface-regulating mechanism is further verified by post-test analysis and the first principle calculation. Furthermore, the MDPO also contributes to the thermal stability of the cells at high temperatures, which effectively increases the endothermic reaction onset temperature and shortens the self-quenching time of the electrolyte. This work provides a novel avenue for the design and screening of different electrolyte additives in the future study.

KeywordLithium Ion Battery Nickel-rich Cathode Methyl Diphenylphosphonate Additive High Voltage Electrolyte
DOI10.1016/j.jpowsour.2020.227852
Language英语
WOS KeywordLithium-ion Batteries ; Manganese Oxide Cathode ; Positive Electrode Materials ; Electrochemical Performance ; Recent Progress ; Fluoroethylene Carbonate ; Cycling Performance ; Thermal-stability ; Ni-rich ; Capacity
Funding ProjectNational Key R&D Program of China[2017YFB0102000] ; National Natural Science Foundation of China[51922099] ; National Natural Science Foundation of China[21808220] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC011] ; Major Program of National Natural Science Foundation of China[21890762] ; Science and Technology Open Cooperation Project of Henan Province[182106000022]
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Major Program of National Natural Science Foundation of China ; Science and Technology Open Cooperation Project of Henan Province
WOS IDWOS:000523641800017
PublisherELSEVIER
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40074
Collection中国科学院过程工程研究所
Corresponding AuthorChen, Shimou; Zhao, Jianling; Zhang, Suojiang
Affiliation1.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, CAS Key Lab Green Proc & Engn,Beijing Key Lab Ion, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Cui, Yingyue,Wang, Yanlei,Gu, Shijie,et al. An effective interface-regulating mechanism enabled by non-sacrificial additives for high-voltage nickel-rich cathode[J]. JOURNAL OF POWER SOURCES,2020,453:9.
APA Cui, Yingyue.,Wang, Yanlei.,Gu, Shijie.,Qian, Cheng.,Chen, Tianhua.,...&Zhang, Suojiang.(2020).An effective interface-regulating mechanism enabled by non-sacrificial additives for high-voltage nickel-rich cathode.JOURNAL OF POWER SOURCES,453,9.
MLA Cui, Yingyue,et al."An effective interface-regulating mechanism enabled by non-sacrificial additives for high-voltage nickel-rich cathode".JOURNAL OF POWER SOURCES 453(2020):9.
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