Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries
Layered P2-Na _0.67 Ni _0.15 Fe _0.2 Mn _0.65 O _2 (P2-NFM) cathode material has attracted great attention in sodium-ion batteries due to its high theoretical capacity, low cost, and environmental friendliness. However, P2-NFM exhibits irreversible phase transition and slip of transition metal layer...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ad3464 |
| _version_ | 1797242533257936896 |
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| author | Shiyou Li Xiaoqi Fan Shimin Wang Mengya Wang Yifan Tong Junfei Zhou Xin Li Dongni Zhao Ningshuang Zhang |
| author_facet | Shiyou Li Xiaoqi Fan Shimin Wang Mengya Wang Yifan Tong Junfei Zhou Xin Li Dongni Zhao Ningshuang Zhang |
| author_sort | Shiyou Li |
| collection | DOAJ |
| description | Layered P2-Na _0.67 Ni _0.15 Fe _0.2 Mn _0.65 O _2 (P2-NFM) cathode material has attracted great attention in sodium-ion batteries due to its high theoretical capacity, low cost, and environmental friendliness. However, P2-NFM exhibits irreversible phase transition and slip of transition metal layers in the high voltage range during charging process, leading to a gradually declined performance of the cathode material. It is therefore necessary to investigate the mechanism of phase transition of P2-NFM as well as the effect of phase transition on its performance. Herein, utilizing ex situ x-ray diffraction spectroscopy and x-ray photoelectron spectroscopy, the crystal structure and TM (transition-metal) bonding changes caused by phase transition are elucidated. It is found that P2-NFM is prone to undergo an irreversible P2-O2 phase transition at high voltage, causing changes in lattice parameters and rapid capacity decay. The irreversible phase transition is mainly due to he dynamic transformation of valence states of Fe and Ni in P2-NFM materials at high voltage. It is this process that results in irreversible fluctuations in the bond lengths between these elements and oxygen, consequently instigating interlayer slip within the material. Besides, the charge compensation mechanism of P2-NFM has been elucidated based on the study of its initial charging process. Results show that the charge compensation is mainly contributed by Ni and Fe in the high voltage range, while by a small amount of Mn in the low voltage range. It reveals the essential cause of the adverse phase transition of P2-NFM materials and points out the direction for improving the cycling stability of these layered oxide materials. |
| first_indexed | 2024-04-24T18:40:44Z |
| format | Article |
| id | doaj.art-2c939fc1864243b0b138e912ba2f9202 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-04-24T18:40:44Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-2c939fc1864243b0b138e912ba2f92022024-03-27T12:06:31ZengIOP PublishingMaterials Research Express2053-15912024-01-0111303550410.1088/2053-1591/ad3464Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteriesShiyou Li0Xiaoqi Fan1Shimin Wang2Mengya Wang3Yifan Tong4Junfei Zhou5Xin Li6Dongni Zhao7Ningshuang Zhang8https://orcid.org/0000-0001-5902-5155School of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaSchool of Petrochemical Technology, Lanzhou University of Technology , Lanzhou 730050, People’s Republic of China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, People’s Republic of ChinaLayered P2-Na _0.67 Ni _0.15 Fe _0.2 Mn _0.65 O _2 (P2-NFM) cathode material has attracted great attention in sodium-ion batteries due to its high theoretical capacity, low cost, and environmental friendliness. However, P2-NFM exhibits irreversible phase transition and slip of transition metal layers in the high voltage range during charging process, leading to a gradually declined performance of the cathode material. It is therefore necessary to investigate the mechanism of phase transition of P2-NFM as well as the effect of phase transition on its performance. Herein, utilizing ex situ x-ray diffraction spectroscopy and x-ray photoelectron spectroscopy, the crystal structure and TM (transition-metal) bonding changes caused by phase transition are elucidated. It is found that P2-NFM is prone to undergo an irreversible P2-O2 phase transition at high voltage, causing changes in lattice parameters and rapid capacity decay. The irreversible phase transition is mainly due to he dynamic transformation of valence states of Fe and Ni in P2-NFM materials at high voltage. It is this process that results in irreversible fluctuations in the bond lengths between these elements and oxygen, consequently instigating interlayer slip within the material. Besides, the charge compensation mechanism of P2-NFM has been elucidated based on the study of its initial charging process. Results show that the charge compensation is mainly contributed by Ni and Fe in the high voltage range, while by a small amount of Mn in the low voltage range. It reveals the essential cause of the adverse phase transition of P2-NFM materials and points out the direction for improving the cycling stability of these layered oxide materials.https://doi.org/10.1088/2053-1591/ad3464electrochemistryenergy storagesodium ion batteryphase transition |
| spellingShingle | Shiyou Li Xiaoqi Fan Shimin Wang Mengya Wang Yifan Tong Junfei Zhou Xin Li Dongni Zhao Ningshuang Zhang Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries Materials Research Express electrochemistry energy storage sodium ion battery phase transition |
| title | Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries |
| title_full | Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries |
| title_fullStr | Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries |
| title_full_unstemmed | Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries |
| title_short | Probing the account of phase transition upon electrochemical cycling of the P2-Na0.67Ni0.15Fe0.2Mn0.65O2 layered oxide cathodes for sodium-ion batteries |
| title_sort | probing the account of phase transition upon electrochemical cycling of the p2 na0 67ni0 15fe0 2mn0 65o2 layered oxide cathodes for sodium ion batteries |
| topic | electrochemistry energy storage sodium ion battery phase transition |
| url | https://doi.org/10.1088/2053-1591/ad3464 |
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