Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study
A density functional theory (DFT) study has been carried out on transition metal phosphates with olivine structure and formula LiMPO4 (M = Fe, Mn, Co, Ni) to assess their potential as cathode materials in rechargeable Li-ion batteries based on their chemical and structural stability and high theoret...
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MDPI AG
2017-04-01
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| author | Mauro Francesco Sgroi Roberto Lazzaroni David Beljonne Daniele Pullini |
| author_facet | Mauro Francesco Sgroi Roberto Lazzaroni David Beljonne Daniele Pullini |
| author_sort | Mauro Francesco Sgroi |
| collection | DOAJ |
| description | A density functional theory (DFT) study has been carried out on transition metal phosphates with olivine structure and formula LiMPO4 (M = Fe, Mn, Co, Ni) to assess their potential as cathode materials in rechargeable Li-ion batteries based on their chemical and structural stability and high theoretical capacity. The investigation focuses on LiMnPO4, which could offer an improved cell potential (4.1 V) with respect to the reference LiFePO4 compound, but it is characterized by poor lithium intercalation/de-intercalation kinetics. Substitution of cations like Co and Ni in the olivine structure of LiMnPO4 was recently reported in an attempt to improve the electrochemical performances. Here the electronic structure and lithium intercalation potential of Ni- and Co-doped LiMnPO4 were calculated in the framework of the Hubbard U density functional theory (DFT+U) method for highly correlated materials. Moreover, the diffusion process of lithium in the host structures was simulated, and the activation barriers in the doped and pristine structures were compared. Our calculation predicted that doping increases Li insertion potential while activation barriers for Li diffusion remain similar to the pristine material. Moreover, Ni and Co doping induces the formation of impurity states near the Fermi level and significantly reduces the band gap of LiMnPO4. |
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| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-12-11T22:56:40Z |
| publishDate | 2017-04-01 |
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| spelling | doaj.art-fa6d180315244297a6e7f5f971d7a5ae2022-12-22T00:47:13ZengMDPI AGBatteries2313-01052017-04-01321110.3390/batteries3020011batteries3020011Doping LiMnPO4 with Cobalt and Nickel: A First Principle StudyMauro Francesco Sgroi0Roberto Lazzaroni1David Beljonne2Daniele Pullini3Group Materials Labs, Centro Ricerche FIAT, Strada Torino 50, 10043 Orbassano, ItalyLaboratory for Chemistry of Novel Materials, University of Mons - UMONS, Place du Parc 20, 7000 Mons,BelgiumLaboratory for Chemistry of Novel Materials, University of Mons - UMONS, Place du Parc 20, 7000 Mons,BelgiumGroup Materials Labs, Centro Ricerche FIAT, Strada Torino 50, 10043 Orbassano, ItalyA density functional theory (DFT) study has been carried out on transition metal phosphates with olivine structure and formula LiMPO4 (M = Fe, Mn, Co, Ni) to assess their potential as cathode materials in rechargeable Li-ion batteries based on their chemical and structural stability and high theoretical capacity. The investigation focuses on LiMnPO4, which could offer an improved cell potential (4.1 V) with respect to the reference LiFePO4 compound, but it is characterized by poor lithium intercalation/de-intercalation kinetics. Substitution of cations like Co and Ni in the olivine structure of LiMnPO4 was recently reported in an attempt to improve the electrochemical performances. Here the electronic structure and lithium intercalation potential of Ni- and Co-doped LiMnPO4 were calculated in the framework of the Hubbard U density functional theory (DFT+U) method for highly correlated materials. Moreover, the diffusion process of lithium in the host structures was simulated, and the activation barriers in the doped and pristine structures were compared. Our calculation predicted that doping increases Li insertion potential while activation barriers for Li diffusion remain similar to the pristine material. Moreover, Ni and Co doping induces the formation of impurity states near the Fermi level and significantly reduces the band gap of LiMnPO4.http://www.mdpi.com/2313-0105/3/2/11LiMnPO4density functional theoryLi-ion batteriesionic diffusion |
| spellingShingle | Mauro Francesco Sgroi Roberto Lazzaroni David Beljonne Daniele Pullini Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study Batteries LiMnPO4 density functional theory Li-ion batteries ionic diffusion |
| title | Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study |
| title_full | Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study |
| title_fullStr | Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study |
| title_full_unstemmed | Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study |
| title_short | Doping LiMnPO4 with Cobalt and Nickel: A First Principle Study |
| title_sort | doping limnpo4 with cobalt and nickel a first principle study |
| topic | LiMnPO4 density functional theory Li-ion batteries ionic diffusion |
| url | http://www.mdpi.com/2313-0105/3/2/11 |
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