Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries
High-voltage spinel (LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>; LNMO) has been a prospective cathode material that may exploit the maximal voltage of 5 V for lithium-ion batteries. However, the practical application has been hindered by the severe electroche...
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| author | So Young Choi Jong Hun Sung Fuead Hasan Sangram Keshari Mohanty Madhusudana Koratikere Srinivasa Hyun Deog Yoo |
| author_facet | So Young Choi Jong Hun Sung Fuead Hasan Sangram Keshari Mohanty Madhusudana Koratikere Srinivasa Hyun Deog Yoo |
| author_sort | So Young Choi |
| collection | DOAJ |
| description | High-voltage spinel (LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>; LNMO) has been a prospective cathode material that may exploit the maximal voltage of 5 V for lithium-ion batteries. However, the practical application has been hindered by the severe electrochemical instability of the Ni<sup>2+</sup>/Ni<sup>4+</sup> redox couple at such a high voltage. Herein, we coated lithium phosphate (Li<sub>3</sub>PO<sub>4</sub>) on the surface of the LNMO by a wet-coating method to improve the electrochemical stability. The coating layer provided an effective cathode–electrolyte interphase, which prevented the excessive decomposition of the electrolyte on the surface of LNMO cathode. The Li<sub>3</sub>PO<sub>4</sub>-coated LNMO exhibited enhanced rate capability in accordance with the lowered solid-electrolyte interphase (SEI) and charge-transfer resistance values from electrochemical impedance spectroscopy. |
| format | Article |
| id | doaj-art-7cfd85508ad747c686d33813775e006d |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-7cfd85508ad747c686d33813775e006d2025-08-20T03:50:21ZengMDPI AGEnergies1996-10732025-06-011813338710.3390/en18133387Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion BatteriesSo Young Choi0Jong Hun Sung1Fuead Hasan2Sangram Keshari Mohanty3Madhusudana Koratikere Srinivasa4Hyun Deog Yoo5Department of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of KoreaDepartment of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of KoreaDepartment of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of KoreaDepartment of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of KoreaDepartment of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of KoreaDepartment of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of KoreaHigh-voltage spinel (LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>; LNMO) has been a prospective cathode material that may exploit the maximal voltage of 5 V for lithium-ion batteries. However, the practical application has been hindered by the severe electrochemical instability of the Ni<sup>2+</sup>/Ni<sup>4+</sup> redox couple at such a high voltage. Herein, we coated lithium phosphate (Li<sub>3</sub>PO<sub>4</sub>) on the surface of the LNMO by a wet-coating method to improve the electrochemical stability. The coating layer provided an effective cathode–electrolyte interphase, which prevented the excessive decomposition of the electrolyte on the surface of LNMO cathode. The Li<sub>3</sub>PO<sub>4</sub>-coated LNMO exhibited enhanced rate capability in accordance with the lowered solid-electrolyte interphase (SEI) and charge-transfer resistance values from electrochemical impedance spectroscopy.https://www.mdpi.com/1996-1073/18/13/3387high-voltage spinel cathodeLi-ion batterylithium phosphate coating |
| spellingShingle | So Young Choi Jong Hun Sung Fuead Hasan Sangram Keshari Mohanty Madhusudana Koratikere Srinivasa Hyun Deog Yoo Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries Energies high-voltage spinel cathode Li-ion battery lithium phosphate coating |
| title | Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries |
| title_full | Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries |
| title_fullStr | Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries |
| title_full_unstemmed | Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries |
| title_short | Synthesis and Electrochemical Properties of the Li<sub>3</sub>PO<sub>4</sub>-Coated LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> Cathode Materials for High-Voltage Lithium-Ion Batteries |
| title_sort | synthesis and electrochemical properties of the li sub 3 sub po sub 4 sub coated lini sub 0 5 sub mn sub 1 5 sub o sub 4 sub cathode materials for high voltage lithium ion batteries |
| topic | high-voltage spinel cathode Li-ion battery lithium phosphate coating |
| url | https://www.mdpi.com/1996-1073/18/13/3387 |
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