Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications
A series of V2O3, V2O3/C and V2O3/G composite powders are prepared by simply annealing the reaction mixture containing ammonium metavanadate (0.1 M), reduced graphene oxide (rGO, 0.1 M) and citric acid (CA, 0.0, 0.1, 0.3 and 0.5 M) at 500 °C for 8 h under Ar flow. A variety of characterization techn...
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sg-ntu-dr.10356-1396562020-06-01T10:01:40Z Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications Petnikota, Shaikshavali Toh, Jun Jie Li, Jia Yang Chua, Rodney Srinivasan, Madhavi School of Materials Science & Engineering Engineering::Materials Ammonium Metavanadate Citric Acid A series of V2O3, V2O3/C and V2O3/G composite powders are prepared by simply annealing the reaction mixture containing ammonium metavanadate (0.1 M), reduced graphene oxide (rGO, 0.1 M) and citric acid (CA, 0.0, 0.1, 0.3 and 0.5 M) at 500 °C for 8 h under Ar flow. A variety of characterization techniques are used to investigate the structural, physiochemical features and electrochemical performance of the powders. The reaction mixture without rGO led to the formation of V2O3 at 0.1 M of CA and V2O3/C at 0.3 and 0.5 M of CA. As anodes of lithium‐ion coin cell batteries, V2O3, V2O3/C and V2O3/G composite electrodes exhibit an increase in capacity with increasing concentrations of CA. The increase in capacity is mainly attributed to the carbonization of CA and the declining crystallinity of V2O3. V2O3/C and V2O3/G prepared at 0.5 M of CA outperformed all other control compounds. The V2O3/C and V2O3/G delivered reversible capacities of 585 and 420 mAh g−1 respectively, during the first cycle with a current density of 50 mA g−1. The respective capacities after few initial cycles continuously increased to 608 and 463 mAh g−1 at the end of the 100th cycle. MOE (Min. of Education, S’pore) 2020-05-21T00:45:03Z 2020-05-21T00:45:03Z 2018 Journal Article Petnikota, S., Toh, J. J., Li, J. Y., Chua, R., & Srinivasan, M. (2019). Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications. ChemElectroChem, 6(2), 493-503. doi:10.1002/celc.201801244 2196-0216 https://hdl.handle.net/10356/139656 10.1002/celc.201801244 2-s2.0-85056325883 2 6 493 503 en ChemElectroChem © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. |
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Engineering::Materials Ammonium Metavanadate Citric Acid Petnikota, Shaikshavali Toh, Jun Jie Li, Jia Yang Chua, Rodney Srinivasan, Madhavi Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications |
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A series of V2O3, V2O3/C and V2O3/G composite powders are prepared by simply annealing the reaction mixture containing ammonium metavanadate (0.1 M), reduced graphene oxide (rGO, 0.1 M) and citric acid (CA, 0.0, 0.1, 0.3 and 0.5 M) at 500 °C for 8 h under Ar flow. A variety of characterization techniques are used to investigate the structural, physiochemical features and electrochemical performance of the powders. The reaction mixture without rGO led to the formation of V2O3 at 0.1 M of CA and V2O3/C at 0.3 and 0.5 M of CA. As anodes of lithium‐ion coin cell batteries, V2O3, V2O3/C and V2O3/G composite electrodes exhibit an increase in capacity with increasing concentrations of CA. The increase in capacity is mainly attributed to the carbonization of CA and the declining crystallinity of V2O3. V2O3/C and V2O3/G prepared at 0.5 M of CA outperformed all other control compounds. The V2O3/C and V2O3/G delivered reversible capacities of 585 and 420 mAh g−1 respectively, during the first cycle with a current density of 50 mA g−1. The respective capacities after few initial cycles continuously increased to 608 and 463 mAh g−1 at the end of the 100th cycle. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering Petnikota, Shaikshavali Toh, Jun Jie Li, Jia Yang Chua, Rodney Srinivasan, Madhavi |
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Article |
author |
Petnikota, Shaikshavali Toh, Jun Jie Li, Jia Yang Chua, Rodney Srinivasan, Madhavi |
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Petnikota, Shaikshavali |
title |
Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications |
title_short |
Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications |
title_full |
Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications |
title_fullStr |
Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications |
title_full_unstemmed |
Citric acid assisted solid state synthesis of V2O3, V2O3/C and V2O3/graphene composites for Li‐ion battery anode applications |
title_sort |
citric acid assisted solid state synthesis of v2o3, v2o3/c and v2o3/graphene composites for li‐ion battery anode applications |
publishDate |
2020 |
url |
https://hdl.handle.net/10356/139656 |
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1681056629645115392 |