Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode
The rapid growth in global electric vehicles (EVs) sales has promoted the development of Co-free, Ni-rich layered cathodes for state-of-the-art high energy-density, inexpensive lithium-ion batteries (LIBs). However, progress in their commercial use has been seriously hampered by exasperating perform...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2022-01-01
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| Series: | eScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667141722000131 |
| _version_ | 1811292025022054400 |
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| author | Lianshan Ni Ruiting Guo Susu Fang Jun Chen Jinqiang Gao Yu Mei Shu Zhang Wentao Deng Guoqiang Zou Hongshuai Hou Xiaobo Ji |
| author_facet | Lianshan Ni Ruiting Guo Susu Fang Jun Chen Jinqiang Gao Yu Mei Shu Zhang Wentao Deng Guoqiang Zou Hongshuai Hou Xiaobo Ji |
| author_sort | Lianshan Ni |
| collection | DOAJ |
| description | The rapid growth in global electric vehicles (EVs) sales has promoted the development of Co-free, Ni-rich layered cathodes for state-of-the-art high energy-density, inexpensive lithium-ion batteries (LIBs). However, progress in their commercial use has been seriously hampered by exasperating performance deterioration and safety concerns. Herein, a robust single-crystalline, Co-free, Ni-rich LiNi0.95Mn0.05O2 (SC-NM95) cathode is successfully designed using a molten salt-assisted method, and it exhibits better structural stability and cycling durability than those of polycrystalline LiNi0.95Mn0.05O2 (PC-NM95). Notably, the SC-NM95 cathode achieves a high discharge capacity of 218.2 mAh g−1, together with a high energy density of 837.3 Wh kg−1 at 0.1 C, mainly due to abundant Ni2+/Ni3+ redox. It also presents an outstanding capacity retention (84.4%) after 200 cycles at 1 C, because its integrated single-crystalline structure effectively inhibits particle microcracking and surface phase transformation. In contrast, the PC-NM95 cathode suffers from rapid capacity fading owing to the nucleation and propagation of intergranular microcracking during cycling, facilitating aggravated parasitic reactions and rock-salt phase accumulation. This work provides a fundamental strategy for designing high-performance single-crystalline, Co-free, Ni-rich cathode materials and also represents an important breakthrough in developing high-safe, low-cost, and high-energy LIBs. |
| first_indexed | 2024-04-13T04:39:11Z |
| format | Article |
| id | doaj.art-db96d74762cb4581b4724db1c87e808a |
| institution | Directory Open Access Journal |
| issn | 2667-1417 |
| language | English |
| last_indexed | 2024-04-13T04:39:11Z |
| publishDate | 2022-01-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | eScience |
| spelling | doaj.art-db96d74762cb4581b4724db1c87e808a2022-12-22T03:02:05ZengKeAi Communications Co. Ltd.eScience2667-14172022-01-0121116124Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathodeLianshan Ni0Ruiting Guo1Susu Fang2Jun Chen3Jinqiang Gao4Yu Mei5Shu Zhang6Wentao Deng7Guoqiang Zou8Hongshuai Hou9Xiaobo Ji10State Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaState Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaCorresponding author.; State Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR ChinaThe rapid growth in global electric vehicles (EVs) sales has promoted the development of Co-free, Ni-rich layered cathodes for state-of-the-art high energy-density, inexpensive lithium-ion batteries (LIBs). However, progress in their commercial use has been seriously hampered by exasperating performance deterioration and safety concerns. Herein, a robust single-crystalline, Co-free, Ni-rich LiNi0.95Mn0.05O2 (SC-NM95) cathode is successfully designed using a molten salt-assisted method, and it exhibits better structural stability and cycling durability than those of polycrystalline LiNi0.95Mn0.05O2 (PC-NM95). Notably, the SC-NM95 cathode achieves a high discharge capacity of 218.2 mAh g−1, together with a high energy density of 837.3 Wh kg−1 at 0.1 C, mainly due to abundant Ni2+/Ni3+ redox. It also presents an outstanding capacity retention (84.4%) after 200 cycles at 1 C, because its integrated single-crystalline structure effectively inhibits particle microcracking and surface phase transformation. In contrast, the PC-NM95 cathode suffers from rapid capacity fading owing to the nucleation and propagation of intergranular microcracking during cycling, facilitating aggravated parasitic reactions and rock-salt phase accumulation. This work provides a fundamental strategy for designing high-performance single-crystalline, Co-free, Ni-rich cathode materials and also represents an important breakthrough in developing high-safe, low-cost, and high-energy LIBs.http://www.sciencedirect.com/science/article/pii/S2667141722000131Single-crystallineCo-free Ni-rich cathodesIntergranular microcrackingH2↔H3 phase transitionCycling stability |
| spellingShingle | Lianshan Ni Ruiting Guo Susu Fang Jun Chen Jinqiang Gao Yu Mei Shu Zhang Wentao Deng Guoqiang Zou Hongshuai Hou Xiaobo Ji Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode eScience Single-crystalline Co-free Ni-rich cathodes Intergranular microcracking H2↔H3 phase transition Cycling stability |
| title | Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode |
| title_full | Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode |
| title_fullStr | Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode |
| title_full_unstemmed | Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode |
| title_short | Crack-free single-crystalline Co-free Ni-rich LiNi0.95Mn0.05O2 layered cathode |
| title_sort | crack free single crystalline co free ni rich lini0 95mn0 05o2 layered cathode |
| topic | Single-crystalline Co-free Ni-rich cathodes Intergranular microcracking H2↔H3 phase transition Cycling stability |
| url | http://www.sciencedirect.com/science/article/pii/S2667141722000131 |
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