Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive
LiNi0.5Mn1.5O4 (LNMO) is a potential cathode material for lithium-ion batteries with outstanding energy density and high voltage plateau (>4.7 V). However, the interfacial side reaction between LNMO and the liquid electrolyte seriously causes capacity fading during cycling at the high voltage...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-08-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2019.00591/full |
| _version_ | 1818422389959032832 |
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| author | Zhe Xiao Renheng Wang Yan Li Yiling Sun Shuting Fan Keyu Xiong Han Zhang Zhengfang Qian |
| author_facet | Zhe Xiao Renheng Wang Yan Li Yiling Sun Shuting Fan Keyu Xiong Han Zhang Zhengfang Qian |
| author_sort | Zhe Xiao |
| collection | DOAJ |
| description | LiNi0.5Mn1.5O4 (LNMO) is a potential cathode material for lithium-ion batteries with outstanding energy density and high voltage plateau (>4.7 V). However, the interfacial side reaction between LNMO and the liquid electrolyte seriously causes capacity fading during cycling at the high voltage. Here, p-toluenesulfonyl isocyanate (PTSI) is used as the electrolyte additive to overcome the above problem of LNMO. The results show that the specific capacity of LNMO/Li cell with 0.5 wt.% PTSI at the first cycle is effectively enhanced by 36.0 mAh/g and has better cycling performance than that without PTSI at 4.98 V. Also, a stable solid electrolyte interface (SEI) film derived from PTSI is generated on the electrode surface, which could alleviate the strike of hydrofluoric acid (HF) caused by electrolyte decomposition. These results are explained by the molecular structure of PTSI, which contains SO3. The S=O groups can delocalize the nitrogen nucleus to block the reactivity of PF5. |
| first_indexed | 2024-12-14T13:25:29Z |
| format | Article |
| id | doaj.art-6c72862821ae4919928c513ea5199a64 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-14T13:25:29Z |
| publishDate | 2019-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-6c72862821ae4919928c513ea5199a642022-12-21T22:59:50ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462019-08-01710.3389/fchem.2019.00591478288Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte AdditiveZhe XiaoRenheng WangYan LiYiling SunShuting FanKeyu XiongHan ZhangZhengfang QianLiNi0.5Mn1.5O4 (LNMO) is a potential cathode material for lithium-ion batteries with outstanding energy density and high voltage plateau (>4.7 V). However, the interfacial side reaction between LNMO and the liquid electrolyte seriously causes capacity fading during cycling at the high voltage. Here, p-toluenesulfonyl isocyanate (PTSI) is used as the electrolyte additive to overcome the above problem of LNMO. The results show that the specific capacity of LNMO/Li cell with 0.5 wt.% PTSI at the first cycle is effectively enhanced by 36.0 mAh/g and has better cycling performance than that without PTSI at 4.98 V. Also, a stable solid electrolyte interface (SEI) film derived from PTSI is generated on the electrode surface, which could alleviate the strike of hydrofluoric acid (HF) caused by electrolyte decomposition. These results are explained by the molecular structure of PTSI, which contains SO3. The S=O groups can delocalize the nitrogen nucleus to block the reactivity of PF5.https://www.frontiersin.org/article/10.3389/fchem.2019.00591/fulllithium ion batteryLiNi0.5Mn1.5O4p-toluenesulfonyl isocyanatesolid electrolyte interfaceelectrolyte additive |
| spellingShingle | Zhe Xiao Renheng Wang Yan Li Yiling Sun Shuting Fan Keyu Xiong Han Zhang Zhengfang Qian Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive Frontiers in Chemistry lithium ion battery LiNi0.5Mn1.5O4 p-toluenesulfonyl isocyanate solid electrolyte interface electrolyte additive |
| title | Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive |
| title_full | Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive |
| title_fullStr | Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive |
| title_full_unstemmed | Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive |
| title_short | Electrochemical Analysis for Enhancing Interface Layer of Spinel LiNi0.5Mn1.5O4 Using p-Toluenesulfonyl Isocyanate as Electrolyte Additive |
| title_sort | electrochemical analysis for enhancing interface layer of spinel lini0 5mn1 5o4 using p toluenesulfonyl isocyanate as electrolyte additive |
| topic | lithium ion battery LiNi0.5Mn1.5O4 p-toluenesulfonyl isocyanate solid electrolyte interface electrolyte additive |
| url | https://www.frontiersin.org/article/10.3389/fchem.2019.00591/full |
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