Carbonyl compounds as cathode materials for lithium-ion batteries
Organic compounds as active electrode materials are known for their low cost, versatility, renewability and eco-friendliness. Carbonyl compounds with large aromatic structure and heteroatoms have proven to achieve long cycling stability and high specific capacity. In this report, a novel carbonyl co...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2017
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| Online Access: | http://hdl.handle.net/10356/69933 |
| _version_ | 1826123265546911744 |
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| author | Choo, Kenneth Wei Jie |
| author2 | Zhang Qichun |
| author_facet | Zhang Qichun Choo, Kenneth Wei Jie |
| author_sort | Choo, Kenneth Wei Jie |
| collection | NTU |
| description | Organic compounds as active electrode materials are known for their low cost, versatility, renewability and eco-friendliness. Carbonyl compounds with large aromatic structure and heteroatoms have proven to achieve long cycling stability and high specific capacity. In this report, a novel carbonyl compound with heteroatoms and large aromatic structures (PDA-4N) was investigated as cathode material for lithium-ion battery. Electrochemical properties of PDA-4N of different weight ratio and NTCDA were evaluated and discussed. The active materials were well blended with CNT additive and PVDF binder before establishing a coin-type cell configuration for analyses on cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), rate performance, cycling performance and charge-discharge capacity profile. Investigations on electrochemical performances of PDA-4N were conducted between 2.0 and 3.9V vs. Li/Li+. PDA-4N demonstrated a reasonably high initial specific capacity of 116.3 mAh g-1 and rate performance up to current rate of 7.92C. PDA-4N also exhibited a stable cycling performance of 50 cycles with reasonable capacity retention of 78.7% of its theoretical capacity and a high coulombic efficiency of 99.86% on average. However, EIS measurement revealed that PDA-4N possessed slow charge transfer capability and poor electric response. Further studies on CNT additive and PVDF binder ratio illustrated a positive effect on cycling stability of PDA-4N. This study reveals that carbonyl compound with heteroatoms and large aromatic structures could potentially be utilised as organic cathode material for rechargeable lithium-ion battery and effective modifications can be made to further enhance the electrochemical properties. |
| first_indexed | 2024-10-01T06:01:50Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/69933 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:01:50Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/699332023-03-04T15:40:30Z Carbonyl compounds as cathode materials for lithium-ion batteries Choo, Kenneth Wei Jie Zhang Qichun School of Materials Science and Engineering DRNTU::Engineering::Materials::Energy materials Organic compounds as active electrode materials are known for their low cost, versatility, renewability and eco-friendliness. Carbonyl compounds with large aromatic structure and heteroatoms have proven to achieve long cycling stability and high specific capacity. In this report, a novel carbonyl compound with heteroatoms and large aromatic structures (PDA-4N) was investigated as cathode material for lithium-ion battery. Electrochemical properties of PDA-4N of different weight ratio and NTCDA were evaluated and discussed. The active materials were well blended with CNT additive and PVDF binder before establishing a coin-type cell configuration for analyses on cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), rate performance, cycling performance and charge-discharge capacity profile. Investigations on electrochemical performances of PDA-4N were conducted between 2.0 and 3.9V vs. Li/Li+. PDA-4N demonstrated a reasonably high initial specific capacity of 116.3 mAh g-1 and rate performance up to current rate of 7.92C. PDA-4N also exhibited a stable cycling performance of 50 cycles with reasonable capacity retention of 78.7% of its theoretical capacity and a high coulombic efficiency of 99.86% on average. However, EIS measurement revealed that PDA-4N possessed slow charge transfer capability and poor electric response. Further studies on CNT additive and PVDF binder ratio illustrated a positive effect on cycling stability of PDA-4N. This study reveals that carbonyl compound with heteroatoms and large aromatic structures could potentially be utilised as organic cathode material for rechargeable lithium-ion battery and effective modifications can be made to further enhance the electrochemical properties. Bachelor of Engineering (Materials Engineering) 2017-04-04T04:09:50Z 2017-04-04T04:09:50Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/69933 en Nanyang Technological University 37 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Energy materials Choo, Kenneth Wei Jie Carbonyl compounds as cathode materials for lithium-ion batteries |
| title | Carbonyl compounds as cathode materials for lithium-ion batteries |
| title_full | Carbonyl compounds as cathode materials for lithium-ion batteries |
| title_fullStr | Carbonyl compounds as cathode materials for lithium-ion batteries |
| title_full_unstemmed | Carbonyl compounds as cathode materials for lithium-ion batteries |
| title_short | Carbonyl compounds as cathode materials for lithium-ion batteries |
| title_sort | carbonyl compounds as cathode materials for lithium ion batteries |
| topic | DRNTU::Engineering::Materials::Energy materials |
| url | http://hdl.handle.net/10356/69933 |
| work_keys_str_mv | AT chookennethweijie carbonylcompoundsascathodematerialsforlithiumionbatteries |