Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density
Abstract The energy density of aqueous asymmetric supercapacitors (ASCs) is usually limited by low potential windows and capacitances of both anode and cathode. Herein, a facile strategy to fabricate hierarchical carbon‐coated porous vanadium nitride nanosheet arrays on vertically aligned carbon wal...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-08-01
|
| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.201900550 |
| _version_ | 1819260630149890048 |
|---|---|
| author | Jun Huang Zhongyou Peng Yingbo Xiao Yazhou Xu Lingfang Chen Yushuai Xiong Licheng Tan Kai Yuan Yiwang Chen |
| author_facet | Jun Huang Zhongyou Peng Yingbo Xiao Yazhou Xu Lingfang Chen Yushuai Xiong Licheng Tan Kai Yuan Yiwang Chen |
| author_sort | Jun Huang |
| collection | DOAJ |
| description | Abstract The energy density of aqueous asymmetric supercapacitors (ASCs) is usually limited by low potential windows and capacitances of both anode and cathode. Herein, a facile strategy to fabricate hierarchical carbon‐coated porous vanadium nitride nanosheet arrays on vertically aligned carbon walls (CC/CW/p‐VN@C) as anode for aqueous ASCs is reported. The potential window of CC/CW/p‐VN@C electrode can be stably extended to –1.3 to 0 V (vs Ag/AgCl) with greatly improved specific capacitance (604.8 F g−1 at 1 A g−1), excellent rate capability (368 F g−1 at 60 A g−1), and remarkable electrochemical stability. To construct ASCs, a Birnessite Na0.5MnO2 nanosheet arrays (CC/CW/Na0.5MnO2) cathode is similarly built. Benefiting from the matchable potential windows and high specific capacitances of the rationally designed anode and cathode, aqueous CC/CW/p‐VN@C||CC/CW/Na0.5MnO2 ASCs with a wide voltage window of 2.6 V are fabricated. Moreover, the ASCs showcase an ultrahigh energy density up to 96.7 W h kg−1 at a high power density of 1294 W kg−1, and excellent cycling stability (92.5% retention after 10 000 cycles), outperforming most of previously reported ASCs and even comparable to that of organic electrolyte supercapacitors (SCs). This efficient strategy for fabricating 2.6 V aqueous ASCs suggests a promising research system for high energy density SCs. |
| first_indexed | 2024-12-23T19:28:57Z |
| format | Article |
| id | doaj.art-2fad4156c3d248bca5543a88cc5b9127 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-23T19:28:57Z |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-2fad4156c3d248bca5543a88cc5b91272022-12-21T17:33:57ZengWileyAdvanced Science2198-38442019-08-01616n/an/a10.1002/advs.201900550Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy DensityJun Huang0Zhongyou Peng1Yingbo Xiao2Yazhou Xu3Lingfang Chen4Yushuai Xiong5Licheng Tan6Kai Yuan7Yiwang Chen8Institute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaInstitute of Polymers and Energy Chemistry College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 ChinaAbstract The energy density of aqueous asymmetric supercapacitors (ASCs) is usually limited by low potential windows and capacitances of both anode and cathode. Herein, a facile strategy to fabricate hierarchical carbon‐coated porous vanadium nitride nanosheet arrays on vertically aligned carbon walls (CC/CW/p‐VN@C) as anode for aqueous ASCs is reported. The potential window of CC/CW/p‐VN@C electrode can be stably extended to –1.3 to 0 V (vs Ag/AgCl) with greatly improved specific capacitance (604.8 F g−1 at 1 A g−1), excellent rate capability (368 F g−1 at 60 A g−1), and remarkable electrochemical stability. To construct ASCs, a Birnessite Na0.5MnO2 nanosheet arrays (CC/CW/Na0.5MnO2) cathode is similarly built. Benefiting from the matchable potential windows and high specific capacitances of the rationally designed anode and cathode, aqueous CC/CW/p‐VN@C||CC/CW/Na0.5MnO2 ASCs with a wide voltage window of 2.6 V are fabricated. Moreover, the ASCs showcase an ultrahigh energy density up to 96.7 W h kg−1 at a high power density of 1294 W kg−1, and excellent cycling stability (92.5% retention after 10 000 cycles), outperforming most of previously reported ASCs and even comparable to that of organic electrolyte supercapacitors (SCs). This efficient strategy for fabricating 2.6 V aqueous ASCs suggests a promising research system for high energy density SCs.https://doi.org/10.1002/advs.201900550aqueous asymmetric supercapacitorsenergy densitynanosheet arraysvanadium nitridevoltage window |
| spellingShingle | Jun Huang Zhongyou Peng Yingbo Xiao Yazhou Xu Lingfang Chen Yushuai Xiong Licheng Tan Kai Yuan Yiwang Chen Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density Advanced Science aqueous asymmetric supercapacitors energy density nanosheet arrays vanadium nitride voltage window |
| title | Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density |
| title_full | Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density |
| title_fullStr | Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density |
| title_full_unstemmed | Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density |
| title_short | Hierarchical Nanosheets/Walls Structured Carbon‐Coated Porous Vanadium Nitride Anodes Enable Wide‐Voltage‐Window Aqueous Asymmetric Supercapacitors with High Energy Density |
| title_sort | hierarchical nanosheets walls structured carbon coated porous vanadium nitride anodes enable wide voltage window aqueous asymmetric supercapacitors with high energy density |
| topic | aqueous asymmetric supercapacitors energy density nanosheet arrays vanadium nitride voltage window |
| url | https://doi.org/10.1002/advs.201900550 |
| work_keys_str_mv | AT junhuang hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT zhongyoupeng hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT yingboxiao hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT yazhouxu hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT lingfangchen hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT yushuaixiong hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT lichengtan hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT kaiyuan hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity AT yiwangchen hierarchicalnanosheetswallsstructuredcarboncoatedporousvanadiumnitrideanodesenablewidevoltagewindowaqueousasymmetricsupercapacitorswithhighenergydensity |