Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway
Abstract Ni‐rich layered (NRL) cathodes have been widely considered to undergo a degeneration from layered to spinel‐like phases and finally to a rock−salt phase, which jeopardizes the battery's performance and safety. However, this process does not sufficiently explain the drastic structure co...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Battery Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/bte2.20220036 |
| _version_ | 1797949062601768960 |
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| author | Ang Gao Xinyan Li Qinghua Zhang Yingchun Lyu Zhexin Tang Tongtong Shang Fanqi Meng Yanhong Luo Pengxiang Ji Xuefeng Wang Dongdong Xiao Dong Su Yong‐Sheng Hu Hong Li Zhen Chen Lin Gu |
| author_facet | Ang Gao Xinyan Li Qinghua Zhang Yingchun Lyu Zhexin Tang Tongtong Shang Fanqi Meng Yanhong Luo Pengxiang Ji Xuefeng Wang Dongdong Xiao Dong Su Yong‐Sheng Hu Hong Li Zhen Chen Lin Gu |
| author_sort | Ang Gao |
| collection | DOAJ |
| description | Abstract Ni‐rich layered (NRL) cathodes have been widely considered to undergo a degeneration from layered to spinel‐like phases and finally to a rock−salt phase, which jeopardizes the battery's performance and safety. However, this process does not sufficiently explain the drastic structure collapse that occurs during thermal runaway, as the lattice constants of these structures are similar. Herein, an intermediate β‐Li2NiO3 phase is identified during the thermally driven structural evolution via in situ heating scanning transmission electron microscopy imaging. The antihoneycomb‐ordered structure leads to a larger lattice mismatch of up to ∼15% with the layered structure. The resulting strain triggers huge bulk stress and the labile oxygen of the β‐Li2NiO3 phase aggravates the oxygen release, severely reducing the thermal stability of NRL materials. Finally, based on the screening for 3d transition metals, doping elements are chosen to suppress the β‐Li2TMO3 phase and enhance thermal stability. The findings provide comprehensive insights into the structural degradation process of NRL materials and pave the way to design high‐performance and safe battery systems. |
| first_indexed | 2024-04-10T21:53:24Z |
| format | Article |
| id | doaj.art-6f1e6a37fe0841ad84c91c9d493f6f91 |
| institution | Directory Open Access Journal |
| issn | 2768-1696 |
| language | English |
| last_indexed | 2024-04-10T21:53:24Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Battery Energy |
| spelling | doaj.art-6f1e6a37fe0841ad84c91c9d493f6f912023-01-18T11:27:03ZengWileyBattery Energy2768-16962023-01-0121n/an/a10.1002/bte2.20220036Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runawayAng Gao0Xinyan Li1Qinghua Zhang2Yingchun Lyu3Zhexin Tang4Tongtong Shang5Fanqi Meng6Yanhong Luo7Pengxiang Ji8Xuefeng Wang9Dongdong Xiao10Dong Su11Yong‐Sheng Hu12Hong Li13Zhen Chen14Lin Gu15Department of Materials Science and Engineering, Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Tsinghua University Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaMaterials Genome Institute Shanghai University Shanghai ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaDepartment of Materials Science and Engineering, State Key of Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing ChinaDepartment of Materials Science and Engineering, State Key of Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences Beijing ChinaDepartment of Materials Science and Engineering, Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Tsinghua University Beijing ChinaDepartment of Materials Science and Engineering, Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Tsinghua University Beijing ChinaAbstract Ni‐rich layered (NRL) cathodes have been widely considered to undergo a degeneration from layered to spinel‐like phases and finally to a rock−salt phase, which jeopardizes the battery's performance and safety. However, this process does not sufficiently explain the drastic structure collapse that occurs during thermal runaway, as the lattice constants of these structures are similar. Herein, an intermediate β‐Li2NiO3 phase is identified during the thermally driven structural evolution via in situ heating scanning transmission electron microscopy imaging. The antihoneycomb‐ordered structure leads to a larger lattice mismatch of up to ∼15% with the layered structure. The resulting strain triggers huge bulk stress and the labile oxygen of the β‐Li2NiO3 phase aggravates the oxygen release, severely reducing the thermal stability of NRL materials. Finally, based on the screening for 3d transition metals, doping elements are chosen to suppress the β‐Li2TMO3 phase and enhance thermal stability. The findings provide comprehensive insights into the structural degradation process of NRL materials and pave the way to design high‐performance and safe battery systems.https://doi.org/10.1002/bte2.20220036β‐Li2NiO3 phaselattice mismatchNi‐rich layered cathodesthermal stability |
| spellingShingle | Ang Gao Xinyan Li Qinghua Zhang Yingchun Lyu Zhexin Tang Tongtong Shang Fanqi Meng Yanhong Luo Pengxiang Ji Xuefeng Wang Dongdong Xiao Dong Su Yong‐Sheng Hu Hong Li Zhen Chen Lin Gu Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway Battery Energy β‐Li2NiO3 phase lattice mismatch Ni‐rich layered cathodes thermal stability |
| title | Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway |
| title_full | Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway |
| title_fullStr | Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway |
| title_full_unstemmed | Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway |
| title_short | Critical intermediate β‐Li2NiO3 phase for structural degradation of Ni‐rich layered cathodes during thermal runaway |
| title_sort | critical intermediate β li2nio3 phase for structural degradation of ni rich layered cathodes during thermal runaway |
| topic | β‐Li2NiO3 phase lattice mismatch Ni‐rich layered cathodes thermal stability |
| url | https://doi.org/10.1002/bte2.20220036 |
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