AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors
The hybrid capacitors were assembled by using lithium titanate/multi-walled carbon nanotubes composite as anode and activated carbon/nickel cobalt manganese acid lithium composite as cathode. The electrode materials were analyzed by scanning electron microscope (SEM), transmission electron microscop...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2020-01-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2020/V48/I1/128 |
| _version_ | 1797966167246110720 |
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| author | CHEN Wei SUN Xiao-gang HU Hao WANG Jie LI Xu LIANG Guo-dong HUANG Ya-pan WEI Cheng-cheng |
| author_facet | CHEN Wei SUN Xiao-gang HU Hao WANG Jie LI Xu LIANG Guo-dong HUANG Ya-pan WEI Cheng-cheng |
| author_sort | CHEN Wei |
| collection | DOAJ |
| description | The hybrid capacitors were assembled by using lithium titanate/multi-walled carbon nanotubes composite as anode and activated carbon/nickel cobalt manganese acid lithium composite as cathode. The electrode materials were analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffractomer (XRD), Raman spectrometer (Raman) and thermal gravimetric analyzer (TGA). The electrochemical performance of hybrid capacitors was tested by galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The results indicate that the addition of multi-walled carbon nanotubes and lithium nickel cobalt manganese oxide can greatly improve the electrochemical performance of hybrid capacitors. The hybrid capacitors achieve a specific capacitance of 161.5 mAh/g at the current density of 0.1 A/g with an additive of 5% (mass fraction) multi-walled carbon nanotubes. The maximum power density and energy density reach 993.2 W/kg and 52.2 Wh/kg in the current range of 0.1-1 A/g,respectively. The continuous galvanostatic charge-discharge cycling tests reveal that the hybrid capacitors maintain capacitance rate retention of 92.2% and Coulomb efficiency of 99.1% after 5000 cycles. The hybrid capacitors show an excellent cycle performance with high energy and power density. |
| first_indexed | 2024-04-11T02:11:29Z |
| format | Article |
| id | doaj.art-34931641bce440e6b933247dec63dc46 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:11:29Z |
| publishDate | 2020-01-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-34931641bce440e6b933247dec63dc462023-01-03T01:57:57ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812020-01-0148112813510.11868/j.issn.1001-4381.2018.00031020200118AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitorsCHEN Wei0SUN Xiao-gang1HU Hao2WANG Jie3LI Xu4LIANG Guo-dong5HUANG Ya-pan6WEI Cheng-cheng7College of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Mechatronics Engineering, Nanchang University, Nanchang 330031, ChinaThe hybrid capacitors were assembled by using lithium titanate/multi-walled carbon nanotubes composite as anode and activated carbon/nickel cobalt manganese acid lithium composite as cathode. The electrode materials were analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffractomer (XRD), Raman spectrometer (Raman) and thermal gravimetric analyzer (TGA). The electrochemical performance of hybrid capacitors was tested by galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The results indicate that the addition of multi-walled carbon nanotubes and lithium nickel cobalt manganese oxide can greatly improve the electrochemical performance of hybrid capacitors. The hybrid capacitors achieve a specific capacitance of 161.5 mAh/g at the current density of 0.1 A/g with an additive of 5% (mass fraction) multi-walled carbon nanotubes. The maximum power density and energy density reach 993.2 W/kg and 52.2 Wh/kg in the current range of 0.1-1 A/g,respectively. The continuous galvanostatic charge-discharge cycling tests reveal that the hybrid capacitors maintain capacitance rate retention of 92.2% and Coulomb efficiency of 99.1% after 5000 cycles. The hybrid capacitors show an excellent cycle performance with high energy and power density.http://jme.biam.ac.cn/CN/Y2020/V48/I1/128multi-walled carbon nanotubesnickel cobalt manganese acid lithiumlithium titanateactivated carbonhybrid capacitor |
| spellingShingle | CHEN Wei SUN Xiao-gang HU Hao WANG Jie LI Xu LIANG Guo-dong HUANG Ya-pan WEI Cheng-cheng AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors Cailiao gongcheng multi-walled carbon nanotubes nickel cobalt manganese acid lithium lithium titanate activated carbon hybrid capacitor |
| title | AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors |
| title_full | AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors |
| title_fullStr | AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors |
| title_full_unstemmed | AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors |
| title_short | AC+Li(NiCoMn)O<sub>2</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>+MWCNTs hybrid capacitors |
| title_sort | ac li nicomn o sub 2 sub li sub 4 sub ti sub 5 sub o sub 12 sub mwcnts hybrid capacitors |
| topic | multi-walled carbon nanotubes nickel cobalt manganese acid lithium lithium titanate activated carbon hybrid capacitor |
| url | http://jme.biam.ac.cn/CN/Y2020/V48/I1/128 |
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