Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling
The increasing demand for cobalt reduction and high energy density in lithium-ion batteries has accelerated the development of cathode-active materials based on Ni-rich layered oxides. However, Ni-rich cathodes, such as LiNi0.8Mn0.1Co0.1O2 (NMC811), suffer from capacity degradation due to factors in...
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The Electrochemical Society of Japan
2025-06-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-71043/_html/-char/en |
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| author | Daisuke SHIBATA Rinka YAMAMOTO Mao MATSUMOTO Haruno MURAYAMA Chengchao ZHONG Keiji SHIMODA Ken-ichi OKAZAKI Shohei YAMASHITA Yuki ORIKASA |
| author_facet | Daisuke SHIBATA Rinka YAMAMOTO Mao MATSUMOTO Haruno MURAYAMA Chengchao ZHONG Keiji SHIMODA Ken-ichi OKAZAKI Shohei YAMASHITA Yuki ORIKASA |
| author_sort | Daisuke SHIBATA |
| collection | DOAJ |
| description | The increasing demand for cobalt reduction and high energy density in lithium-ion batteries has accelerated the development of cathode-active materials based on Ni-rich layered oxides. However, Ni-rich cathodes, such as LiNi0.8Mn0.1Co0.1O2 (NMC811), suffer from capacity degradation due to factors including crystal structure changes, particle fractures, and the formation of surface resistive layers. While these degradation mechanisms have been extensively studied, the specific effects of high current density on capacity fading remains unclear. In this study, we investigate the degradation mechanisms of NMC811 cathodes cycled at 0.1C and 2C rates. Cycling at 2C rate results in severe capacity fading over 50 cycles. Synchrotron X-ray diffraction confirms the preservation of the crystal structure without evidence of Li–Ni site exchange. X-ray computed tomography reveals surface breakdown of primary particles following high-rate cycling. X-ray absorption spectroscopy and hard X-ray photoelectron spectroscopy indicate the formation of a thick resistive surface layer after the cycling at 2C rate. This layer, formed due to high polarization and intensified side reactions, impedes lithium-ion transport, leading to significant capacity degradation. |
| format | Article |
| id | doaj-art-5f1ab3b0adba4cb788adc7c3b26a9f50 |
| institution | Kabale University |
| issn | 2186-2451 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj-art-5f1ab3b0adba4cb788adc7c3b26a9f502025-08-20T03:47:20ZengThe Electrochemical Society of JapanElectrochemistry2186-24512025-06-0193606301606301610.5796/electrochemistry.25-71043electrochemistryAnalysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge CyclingDaisuke SHIBATA0Rinka YAMAMOTO1Mao MATSUMOTO2Haruno MURAYAMA3https://orcid.org/0000-0002-3283-9084Chengchao ZHONG4https://orcid.org/0000-0002-3089-6974Keiji SHIMODA5https://orcid.org/0000-0003-4600-3437Ken-ichi OKAZAKI6https://orcid.org/0000-0003-0800-712XShohei YAMASHITA7https://orcid.org/0000-0002-0842-6239Yuki ORIKASA8https://orcid.org/0000-0002-9869-9520Research Organization of Science and Technology, Ritsumeikan UniversityDepartment of Applied Chemistry, Ritsumeikan UniversityDepartment of Applied Chemistry, Ritsumeikan UniversityDepartment of Applied Chemistry and Bioscience, Kanagawa Institute of TechnologyDepartment of Applied Chemistry, Ritsumeikan UniversityRitsumeikan Global Innovation Research Organization, Ritsumeikan UniversityResearch Organization of Science and Technology, Ritsumeikan UniversityInstitute of Materials Structure Science Photon Factory, High Energy Accelerator Research Organization (KEK)Department of Applied Chemistry, Ritsumeikan UniversityThe increasing demand for cobalt reduction and high energy density in lithium-ion batteries has accelerated the development of cathode-active materials based on Ni-rich layered oxides. However, Ni-rich cathodes, such as LiNi0.8Mn0.1Co0.1O2 (NMC811), suffer from capacity degradation due to factors including crystal structure changes, particle fractures, and the formation of surface resistive layers. While these degradation mechanisms have been extensively studied, the specific effects of high current density on capacity fading remains unclear. In this study, we investigate the degradation mechanisms of NMC811 cathodes cycled at 0.1C and 2C rates. Cycling at 2C rate results in severe capacity fading over 50 cycles. Synchrotron X-ray diffraction confirms the preservation of the crystal structure without evidence of Li–Ni site exchange. X-ray computed tomography reveals surface breakdown of primary particles following high-rate cycling. X-ray absorption spectroscopy and hard X-ray photoelectron spectroscopy indicate the formation of a thick resistive surface layer after the cycling at 2C rate. This layer, formed due to high polarization and intensified side reactions, impedes lithium-ion transport, leading to significant capacity degradation.https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-71043/_html/-char/enlithium-ion batterycathodelayered rock-salt oxidedegradation |
| spellingShingle | Daisuke SHIBATA Rinka YAMAMOTO Mao MATSUMOTO Haruno MURAYAMA Chengchao ZHONG Keiji SHIMODA Ken-ichi OKAZAKI Shohei YAMASHITA Yuki ORIKASA Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling Electrochemistry lithium-ion battery cathode layered rock-salt oxide degradation |
| title | Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling |
| title_full | Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling |
| title_fullStr | Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling |
| title_full_unstemmed | Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling |
| title_short | Analysis of Degradation Mechanisms in LiNi0.8Mn0.1Co0.1O2 Lithium-ion Battery Cathodes During High-Rate Charge–Discharge Cycling |
| title_sort | analysis of degradation mechanisms in lini0 8mn0 1co0 1o2 lithium ion battery cathodes during high rate charge discharge cycling |
| topic | lithium-ion battery cathode layered rock-salt oxide degradation |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-71043/_html/-char/en |
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