The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries
Understanding and controlling the (electro) chemical reactions between positive electrodes and electrolytes is essential to enhance the cycle life and safety of Li-ion batteries. Previous computational and experimental studies have shown that greater capacity loss of LiNixMnyCo1-x-yO2 (NMC) with inc...
| Principais autores: | , , , , , , , , |
|---|---|
| Outros Autores: | |
| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
The Electrochemical Society
2020
|
| Acesso em linha: | https://hdl.handle.net/1721.1/128004 |
| _version_ | 1826196145999708160 |
|---|---|
| author | Karayaylali, Pinar Zhang, Yirui Giordano, Livia Katayama, Yu Tatara, Ryoichi Yu, Yang Maglia, Filippo Jung, Roland Shao-Horn, Yang |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Karayaylali, Pinar Zhang, Yirui Giordano, Livia Katayama, Yu Tatara, Ryoichi Yu, Yang Maglia, Filippo Jung, Roland Shao-Horn, Yang |
| author_sort | Karayaylali, Pinar |
| collection | MIT |
| description | Understanding and controlling the (electro) chemical reactions between positive electrodes and electrolytes is essential to enhance the cycle life and safety of Li-ion batteries. Previous computational and experimental studies have shown that greater capacity loss of LiNixMnyCo1-x-yO2 (NMC) with increased Ni content can be attributed to the enhanced chemical oxidation of carbonate solvents by dehydrogenation and increased salt decomposition. In this study, we examine the role of a diphenyl carbonate (DPC) additive on the interfacial reactivity of LiNi1/3Mn1/3Co1/3O2, LiNi0.6Mn0.2Co0.2O2, LiNi0.8Mn0.1Co0.1O2 (NMC111, NMC622 and NMC811). Diffuse reflectance infrared Fourier Transform (DRIFT) spectroscopy on NMCs showed that adding DPC in the electrolyte suppressed signals associated with dehydrogenation of ethylene carbonate (EC) from LiNi1/3Mn1/3Ni1/3O2 to LiNi0.8Mn0.1Ni0.1O2 (NMC111 to NMC811). In addition, having DPC in the electrolyte was accompanied with less PF6- salt anion decomposition to form less-fluorine coordinated species such as lithium nickel oxyfluorides or PF3O-like species as revealed by combined infrared spectroscopy and X-ray Photoelectron Spectroscopy (XPS) for Ni-rich NMCs. Such observations are in agreement with previous work showing that DPC can increase the cycling performance of NMC811. The reduced reactivity between NMC such as NMC811 and electrolyte with DPC can be attributed to the formation of surface reaction products from the electrochemical oxidation of DPC occurring at lower voltages compared to the chemical oxidative dehydrogenation of carbonates. This hypothesis is supported by in situ infrared spectroscopy measurements, which revealed electrochemical oxidation of diphenyl carbonate upon charging at 3.9 VLi, accompanied by the detection of a feature around 1824 cm-1 attributed to organic oxidation products adsorbed on the oxide surface, and a stable electrode/electrolyte interface on NMC811 at higher voltages. |
| first_indexed | 2024-09-23T10:22:16Z |
| format | Article |
| id | mit-1721.1/128004 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:22:16Z |
| publishDate | 2020 |
| publisher | The Electrochemical Society |
| record_format | dspace |
| spelling | mit-1721.1/1280042022-09-26T17:28:24Z The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries Karayaylali, Pinar Zhang, Yirui Giordano, Livia Katayama, Yu Tatara, Ryoichi Yu, Yang Maglia, Filippo Jung, Roland Shao-Horn, Yang Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Research Laboratory of Electronics Massachusetts Institute of Technology. Department of Materials Science and Engineering Understanding and controlling the (electro) chemical reactions between positive electrodes and electrolytes is essential to enhance the cycle life and safety of Li-ion batteries. Previous computational and experimental studies have shown that greater capacity loss of LiNixMnyCo1-x-yO2 (NMC) with increased Ni content can be attributed to the enhanced chemical oxidation of carbonate solvents by dehydrogenation and increased salt decomposition. In this study, we examine the role of a diphenyl carbonate (DPC) additive on the interfacial reactivity of LiNi1/3Mn1/3Co1/3O2, LiNi0.6Mn0.2Co0.2O2, LiNi0.8Mn0.1Co0.1O2 (NMC111, NMC622 and NMC811). Diffuse reflectance infrared Fourier Transform (DRIFT) spectroscopy on NMCs showed that adding DPC in the electrolyte suppressed signals associated with dehydrogenation of ethylene carbonate (EC) from LiNi1/3Mn1/3Ni1/3O2 to LiNi0.8Mn0.1Ni0.1O2 (NMC111 to NMC811). In addition, having DPC in the electrolyte was accompanied with less PF6- salt anion decomposition to form less-fluorine coordinated species such as lithium nickel oxyfluorides or PF3O-like species as revealed by combined infrared spectroscopy and X-ray Photoelectron Spectroscopy (XPS) for Ni-rich NMCs. Such observations are in agreement with previous work showing that DPC can increase the cycling performance of NMC811. The reduced reactivity between NMC such as NMC811 and electrolyte with DPC can be attributed to the formation of surface reaction products from the electrochemical oxidation of DPC occurring at lower voltages compared to the chemical oxidative dehydrogenation of carbonates. This hypothesis is supported by in situ infrared spectroscopy measurements, which revealed electrochemical oxidation of diphenyl carbonate upon charging at 3.9 VLi, accompanied by the detection of a feature around 1824 cm-1 attributed to organic oxidation products adsorbed on the oxide surface, and a stable electrode/electrolyte interface on NMC811 at higher voltages. 2020-10-15T15:43:50Z 2020-10-15T15:43:50Z 2020-03 2019-11 2020-09-21T16:14:50Z Article http://purl.org/eprint/type/JournalArticle 1945-7111 https://hdl.handle.net/1721.1/128004 Karayaylali, Pinar et al. "The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries." Journal of the Electrochemical Society 167, 4 (March 2020): 522 © 2020 The Electrochemical Society en http://dx.doi.org/10.1149/1945-7111/ab78fe Journal of the Electrochemical Society Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf The Electrochemical Society Prof. Shao-Horn via Elizabeth Soergel |
| spellingShingle | Karayaylali, Pinar Zhang, Yirui Giordano, Livia Katayama, Yu Tatara, Ryoichi Yu, Yang Maglia, Filippo Jung, Roland Shao-Horn, Yang The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries |
| title | The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries |
| title_full | The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries |
| title_fullStr | The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries |
| title_full_unstemmed | The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries |
| title_short | The Role of Diphenyl Carbonate Additive on the Interfacial Reactivity of Positive Electrodes in Li-ion Batteries |
| title_sort | role of diphenyl carbonate additive on the interfacial reactivity of positive electrodes in li ion batteries |
| url | https://hdl.handle.net/1721.1/128004 |
| work_keys_str_mv | AT karayaylalipinar theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT zhangyirui theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT giordanolivia theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT katayamayu theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT tatararyoichi theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT yuyang theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT magliafilippo theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT jungroland theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT shaohornyang theroleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT karayaylalipinar roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT zhangyirui roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT giordanolivia roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT katayamayu roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT tatararyoichi roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT yuyang roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT magliafilippo roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT jungroland roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries AT shaohornyang roleofdiphenylcarbonateadditiveontheinterfacialreactivityofpositiveelectrodesinliionbatteries |