Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries
The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x (x = 0, 0.01, 0.03, 0.05) is prepared by traditional solid-phase method, and the Nb and F ions are successfully doped into Mn and O sites of layered materials Li1.2Mn0.54Co0.13Ni0.13O2, respectively. The incorporating Nb ion in Mn site can effectively restrai...
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| Format: | Article |
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Frontiers Media S.A.
2018-04-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fchem.2018.00076/full |
| _version_ | 1818977628966617088 |
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| author | Lei Ming Bao Zhang Yang Cao Yang Cao Jia-Feng Zhang Chun-Hui Wang Xiao-Wei Wang Hui Li |
| author_facet | Lei Ming Bao Zhang Yang Cao Yang Cao Jia-Feng Zhang Chun-Hui Wang Xiao-Wei Wang Hui Li |
| author_sort | Lei Ming |
| collection | DOAJ |
| description | The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x (x = 0, 0.01, 0.03, 0.05) is prepared by traditional solid-phase method, and the Nb and F ions are successfully doped into Mn and O sites of layered materials Li1.2Mn0.54Co0.13Ni0.13O2, respectively. The incorporating Nb ion in Mn site can effectively restrain the migration of transition metal ions during long-term cycling, and keep the stability of the crystal structure. The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x shows suppressed voltage fade and higher capacity retention of 98.1% after 200 cycles at rate of 1 C. The replacement of O2− by the strongly electronegative F− is beneficial for suppressed the structure change of Li2MnO3 from the eliminating of oxygen in initial charge process. Therefore, the initial coulombic efficiency of doped Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x gets improved, which is higher than that of pure Li1.2Mn0.54Co0.13Ni0.13O2. In addition, the Nb and F co-doping can effectively enhance the transfer of lithium-ion and electrons, and thus improving rate performance. |
| first_indexed | 2024-12-20T16:30:46Z |
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| id | doaj.art-54e28c659f0d46e1bd53af0fc3d0e684 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-20T16:30:46Z |
| publishDate | 2018-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-54e28c659f0d46e1bd53af0fc3d0e6842022-12-21T19:33:16ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462018-04-01610.3389/fchem.2018.00076357672Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion BatteriesLei Ming0Bao Zhang1Yang Cao2Yang Cao3Jia-Feng Zhang4Chun-Hui Wang5Xiao-Wei Wang6Hui Li7School of Metallurgy and Environment, Central South University, Changsha, ChinaSchool of Metallurgy and Environment, Central South University, Changsha, ChinaSchool of Metallurgy and Environment, Central South University, Changsha, ChinaMedical Engineering Center, Xiangya Hospital of Central South University, Changsha, ChinaSchool of Metallurgy and Environment, Central South University, Changsha, ChinaSchool of Metallurgy and Environment, Central South University, Changsha, ChinaSchool of Metallurgy and Environment, Central South University, Changsha, ChinaSchool of Metallurgy and Environment, Central South University, Changsha, ChinaThe Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x (x = 0, 0.01, 0.03, 0.05) is prepared by traditional solid-phase method, and the Nb and F ions are successfully doped into Mn and O sites of layered materials Li1.2Mn0.54Co0.13Ni0.13O2, respectively. The incorporating Nb ion in Mn site can effectively restrain the migration of transition metal ions during long-term cycling, and keep the stability of the crystal structure. The Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x shows suppressed voltage fade and higher capacity retention of 98.1% after 200 cycles at rate of 1 C. The replacement of O2− by the strongly electronegative F− is beneficial for suppressed the structure change of Li2MnO3 from the eliminating of oxygen in initial charge process. Therefore, the initial coulombic efficiency of doped Li1.2Mn0.54−xNbxCo0.13Ni0.13O2−6xF6x gets improved, which is higher than that of pure Li1.2Mn0.54Co0.13Ni0.13O2. In addition, the Nb and F co-doping can effectively enhance the transfer of lithium-ion and electrons, and thus improving rate performance.http://journal.frontiersin.org/article/10.3389/fchem.2018.00076/fullLi1.2Mn0.54Ni0.13Co0.13O2Nb and F co-dopingcathode materialcoulombic efficiencyelectrochemical property |
| spellingShingle | Lei Ming Bao Zhang Yang Cao Yang Cao Jia-Feng Zhang Chun-Hui Wang Xiao-Wei Wang Hui Li Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries Frontiers in Chemistry Li1.2Mn0.54Ni0.13Co0.13O2 Nb and F co-doping cathode material coulombic efficiency electrochemical property |
| title | Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries |
| title_full | Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries |
| title_fullStr | Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries |
| title_full_unstemmed | Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries |
| title_short | Effect of Nb and F Co-doping on Li1.2Mn0.54Ni0.13Co0.13O2 Cathode Material for High-Performance Lithium-Ion Batteries |
| title_sort | effect of nb and f co doping on li1 2mn0 54ni0 13co0 13o2 cathode material for high performance lithium ion batteries |
| topic | Li1.2Mn0.54Ni0.13Co0.13O2 Nb and F co-doping cathode material coulombic efficiency electrochemical property |
| url | http://journal.frontiersin.org/article/10.3389/fchem.2018.00076/full |
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