Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries
Extensive research on electrode materials has been sparked by the rising demand for high-energy-density rechargeable lithium-ion batteries (LIBs). Graphite is a crucial component of LIB anodes, as more than 90% of the commercialized cathodes are coupled with the graphite anode. For the advanced grap...
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| author | Jong Hun Sung Taewan Kim Soljin Kim Fuead Hasan Sangram Keshari Mohanty Madhusudana Koratikere Srinivasa Sri Charan Reddy Hyun Deog Yoo |
| author_facet | Jong Hun Sung Taewan Kim Soljin Kim Fuead Hasan Sangram Keshari Mohanty Madhusudana Koratikere Srinivasa Sri Charan Reddy Hyun Deog Yoo |
| author_sort | Jong Hun Sung |
| collection | DOAJ |
| description | Extensive research on electrode materials has been sparked by the rising demand for high-energy-density rechargeable lithium-ion batteries (LIBs). Graphite is a crucial component of LIB anodes, as more than 90% of the commercialized cathodes are coupled with the graphite anode. For the advanced graphite anode, the fast charge–discharge electrochemical performance and the thermal stability need to be further improved in order to meet the growing demand. Herein, a graphite anode material’s thermo-electrochemical stability was improved by the surface coating of lithium phosphate (Li<sub>3</sub>PO<sub>4</sub>; LPO). The graphite anode with a well-dispersed LPO-coating layer (graphite@LPO) demonstrated significant improvement in the cycle and rate performances. The graphite@LPO sample showed a capacity retention of 67.8% after 300 cycles at 60 °C, whereas the pristine graphite anode failed after 225 cycles, confirming the ameliorated thermo-electrochemical stability and cyclability by LPO coating. The improved thermo-electrochemical stability of the graphite@LPO anode was validated by the full-cell tests as well. The performance enhancement by LPO-coating is due to the suppression of the growth of the surface film and charge-transfer resistances during the repeated cycling, as evidenced by the electrochemical impedance spectroscopy analysis. |
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| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T23:25:15Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-fed3a500314f4ed0a72b429f10696f7f2023-11-19T08:03:50ZengMDPI AGEnergies1996-10732023-08-011617614110.3390/en16176141Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion BatteriesJong Hun Sung0Taewan Kim1Soljin Kim2Fuead Hasan3Sangram Keshari Mohanty4Madhusudana Koratikere Srinivasa5Sri Charan Reddy6Hyun Deog Yoo7Department 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 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 KoreaExtensive research on electrode materials has been sparked by the rising demand for high-energy-density rechargeable lithium-ion batteries (LIBs). Graphite is a crucial component of LIB anodes, as more than 90% of the commercialized cathodes are coupled with the graphite anode. For the advanced graphite anode, the fast charge–discharge electrochemical performance and the thermal stability need to be further improved in order to meet the growing demand. Herein, a graphite anode material’s thermo-electrochemical stability was improved by the surface coating of lithium phosphate (Li<sub>3</sub>PO<sub>4</sub>; LPO). The graphite anode with a well-dispersed LPO-coating layer (graphite@LPO) demonstrated significant improvement in the cycle and rate performances. The graphite@LPO sample showed a capacity retention of 67.8% after 300 cycles at 60 °C, whereas the pristine graphite anode failed after 225 cycles, confirming the ameliorated thermo-electrochemical stability and cyclability by LPO coating. The improved thermo-electrochemical stability of the graphite@LPO anode was validated by the full-cell tests as well. The performance enhancement by LPO-coating is due to the suppression of the growth of the surface film and charge-transfer resistances during the repeated cycling, as evidenced by the electrochemical impedance spectroscopy analysis.https://www.mdpi.com/1996-1073/16/17/6141lithium-ion batteriesgraphite anodelithium phosphate (Li<sub>3</sub>PO<sub>4</sub>)thermo-electrochemical stability |
| spellingShingle | Jong Hun Sung Taewan Kim Soljin Kim Fuead Hasan Sangram Keshari Mohanty Madhusudana Koratikere Srinivasa Sri Charan Reddy Hyun Deog Yoo Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries Energies lithium-ion batteries graphite anode lithium phosphate (Li<sub>3</sub>PO<sub>4</sub>) thermo-electrochemical stability |
| title | Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries |
| title_full | Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries |
| title_fullStr | Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries |
| title_full_unstemmed | Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries |
| title_short | Li<sub>3</sub>PO<sub>4</sub>-Coated Graphite Anode for Thermo-Electrochemically Stable Lithium-Ion Batteries |
| title_sort | li sub 3 sub po sub 4 sub coated graphite anode for thermo electrochemically stable lithium ion batteries |
| topic | lithium-ion batteries graphite anode lithium phosphate (Li<sub>3</sub>PO<sub>4</sub>) thermo-electrochemical stability |
| url | https://www.mdpi.com/1996-1073/16/17/6141 |
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