Effect of overcharge on entropy and enthalpy of lithium-ion batteries
We have investigated the evolution of the thermodynamics behaviour and of the crystal structure of electrodes materials of lithium-ion batteries based on graphite anode and lithium cobalt oxide (LCO) cathode after applying high voltage charging between 4.2 V and 4.9 V cut-off voltages (COV). We foun...
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| Drugi avtorji: | |
| Format: | Journal Article |
| Jezik: | English |
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2013
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| Online dostop: | https://hdl.handle.net/10356/106088 http://hdl.handle.net/10220/10842 |
| _version_ | 1826124722064064512 |
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| author | Maher, Kenza Yazami, Rachid |
| author2 | Energy Research Institute @ NTU (ERI@N) |
| author_facet | Energy Research Institute @ NTU (ERI@N) Maher, Kenza Yazami, Rachid |
| author_sort | Maher, Kenza |
| collection | NTU |
| description | We have investigated the evolution of the thermodynamics behaviour and of the crystal structure of electrodes materials of lithium-ion batteries based on graphite anode and lithium cobalt oxide (LCO) cathode after applying high voltage charging between 4.2 V and 4.9 V cut-off voltages (COV). We found the entropy and enthalpy profiles vary dramatically with the applied COV. These changes correlate well with the anode and the cathode crystal structure degradation as evidenced by post-mortem X-ray diffractometry and Raman scattering spectrometry. Our finding is thermodynamics measurements can be used as a new and non-destructive investigation tool to characterize the degradation level of electrode materials and consequently assess the cell's state of health (SOH). |
| first_indexed | 2024-10-01T06:24:59Z |
| format | Journal Article |
| id | ntu-10356/106088 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:24:59Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1060882021-01-08T06:13:04Z Effect of overcharge on entropy and enthalpy of lithium-ion batteries Maher, Kenza Yazami, Rachid Energy Research Institute @ NTU (ERI@N) We have investigated the evolution of the thermodynamics behaviour and of the crystal structure of electrodes materials of lithium-ion batteries based on graphite anode and lithium cobalt oxide (LCO) cathode after applying high voltage charging between 4.2 V and 4.9 V cut-off voltages (COV). We found the entropy and enthalpy profiles vary dramatically with the applied COV. These changes correlate well with the anode and the cathode crystal structure degradation as evidenced by post-mortem X-ray diffractometry and Raman scattering spectrometry. Our finding is thermodynamics measurements can be used as a new and non-destructive investigation tool to characterize the degradation level of electrode materials and consequently assess the cell's state of health (SOH). 2013-07-01T04:29:49Z 2019-12-06T22:04:21Z 2013-07-01T04:29:49Z 2019-12-06T22:04:21Z 2012 2012 Journal Article Maher, K., & Yazami, R. (2013). Effect of overcharge on entropy and enthalpy of lithium-ion batteries. Electrochimica Acta, 101, 71-78. 0013-4686 https://hdl.handle.net/10356/106088 http://hdl.handle.net/10220/10842 10.1016/j.electacta.2012.11.057 en Electrochimica acta © 2012 Elsevier Ltd. |
| spellingShingle | Maher, Kenza Yazami, Rachid Effect of overcharge on entropy and enthalpy of lithium-ion batteries |
| title | Effect of overcharge on entropy and enthalpy of lithium-ion batteries |
| title_full | Effect of overcharge on entropy and enthalpy of lithium-ion batteries |
| title_fullStr | Effect of overcharge on entropy and enthalpy of lithium-ion batteries |
| title_full_unstemmed | Effect of overcharge on entropy and enthalpy of lithium-ion batteries |
| title_short | Effect of overcharge on entropy and enthalpy of lithium-ion batteries |
| title_sort | effect of overcharge on entropy and enthalpy of lithium ion batteries |
| url | https://hdl.handle.net/10356/106088 http://hdl.handle.net/10220/10842 |
| work_keys_str_mv | AT maherkenza effectofoverchargeonentropyandenthalpyoflithiumionbatteries AT yazamirachid effectofoverchargeonentropyandenthalpyoflithiumionbatteries |