Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries
Understanding the capacity fading mechanism of the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> (NCM811) cathode materials is crucial for achieving long-lasting lithium-ion batteries with high energy densities. In this study, we inve...
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MDPI AG
2019-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/9/1638 |
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| author | Yong-keon Ahn Yong Nam Jo Woosuk Cho Ji-Sang Yu Ki Jae Kim |
| author_facet | Yong-keon Ahn Yong Nam Jo Woosuk Cho Ji-Sang Yu Ki Jae Kim |
| author_sort | Yong-keon Ahn |
| collection | DOAJ |
| description | Understanding the capacity fading mechanism of the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> (NCM811) cathode materials is crucial for achieving long-lasting lithium-ion batteries with high energy densities. In this study, we investigated the factors affecting the capacity fading of NCM811 during repeated cycling at high temperatures. We found that the change in the c-axis length during charging and discharging is the main cause of the formation and propagation of microcracks in the primary particles of NCM811. In addition, the electrolyte is decomposed on the microcrack surfaces and, consequently, by-products are formed on the particle surface, increasing the impedance and resulting in poor electronic and ionic connectivity between the primary particles of NCM811. In addition, the transition metals in the NCM811 cathode material are dissolved in the electrolyte from the newly formed microcrack surface between primary particles. Therefore, the electrolyte decomposition and transition metal dissolution on the newly formed surface are the major deteriorative effects behind the capacity fading in NCM811. |
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| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T08:43:05Z |
| publishDate | 2019-04-01 |
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| series | Energies |
| spelling | doaj.art-2f294d579bdf4ae19fd840e0097fba352022-12-22T02:53:50ZengMDPI AGEnergies1996-10732019-04-01129163810.3390/en12091638en12091638Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion BatteriesYong-keon Ahn0Yong Nam Jo1Woosuk Cho2Ji-Sang Yu3Ki Jae Kim4Department of Energy Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, KoreaAdvanced Batteries Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Bundang-gu, Seongnam, Gyeonggi-do 13509, KoreaAdvanced Batteries Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Bundang-gu, Seongnam, Gyeonggi-do 13509, KoreaAdvanced Batteries Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Bundang-gu, Seongnam, Gyeonggi-do 13509, KoreaDepartment of Energy Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, KoreaUnderstanding the capacity fading mechanism of the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> (NCM811) cathode materials is crucial for achieving long-lasting lithium-ion batteries with high energy densities. In this study, we investigated the factors affecting the capacity fading of NCM811 during repeated cycling at high temperatures. We found that the change in the c-axis length during charging and discharging is the main cause of the formation and propagation of microcracks in the primary particles of NCM811. In addition, the electrolyte is decomposed on the microcrack surfaces and, consequently, by-products are formed on the particle surface, increasing the impedance and resulting in poor electronic and ionic connectivity between the primary particles of NCM811. In addition, the transition metals in the NCM811 cathode material are dissolved in the electrolyte from the newly formed microcrack surface between primary particles. Therefore, the electrolyte decomposition and transition metal dissolution on the newly formed surface are the major deteriorative effects behind the capacity fading in NCM811.https://www.mdpi.com/1996-1073/12/9/1638microcrackstructural stabilitycapacity fadingNCM811Ni-rich cathode material |
| spellingShingle | Yong-keon Ahn Yong Nam Jo Woosuk Cho Ji-Sang Yu Ki Jae Kim Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries Energies microcrack structural stability capacity fading NCM811 Ni-rich cathode material |
| title | Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries |
| title_full | Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries |
| title_fullStr | Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries |
| title_full_unstemmed | Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries |
| title_short | Mechanism of Capacity Fading in the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode Material for Lithium-Ion Batteries |
| title_sort | mechanism of capacity fading in the lini sub 0 8 sub co sub 0 1 sub mn sub 0 1 sub o sub 2 sub cathode material for lithium ion batteries |
| topic | microcrack structural stability capacity fading NCM811 Ni-rich cathode material |
| url | https://www.mdpi.com/1996-1073/12/9/1638 |
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