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 | |
刊名 | JOURNAL OF POWER SOURCES |
2020-03-31 | |
卷号 | 453页码:9 |
关键词 | Lithium Ion Battery Nickel-rich Cathode Methyl Diphenylphosphonate Additive High Voltage Electrolyte |
ISSN号 | 0378-7753 |
DOI | 10.1016/j.jpowsour.2020.227852 |
英文摘要 | 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. |
资助项目 | National 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关键词 | Lithium-ion Batteries ; Manganese Oxide Cathode ; Positive Electrode Materials ; Electrochemical Performance ; Recent Progress ; Fluoroethylene Carbonate ; Cycling Performance ; Thermal-stability ; Ni-rich ; Capacity |
WOS研究方向 | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000523641800017 |
资助机构 | National 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 |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/40073] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Chen, Shimou; Zhao, Jianling; Zhang, Suojiang |
作者单位 | 1.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 |
推荐引用方式 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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