Molten-NaNH2 activated carbon cloth with high areal capacitance and exceptional rate stability for flexible asymmetric supercapacitors

Zhou, Shuai; Chen, Ke; Quan, Hongying; Su, Minxing; Zeng, Zhen; Pan, Menghua; Chen, Dezhi; Guo, Lin

doi:10.1007/s10853-019-03453-4

Cited by 20 publications

(9 citation statements)

References 42 publications

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“…The CO 2 over N 2 selectivity was calculated for CO 2 –N 2 binary mixtures through the ideal adsorption solution theory (IAST). Moreover, for OAC‐500‐2.5, the calculated selectivity was 15.7 at 1 bar and mixture (CO 2 : N 2 = 15:85), which was similar or higher to those of N‐doped adsorbents published recently . Because of the difference between N 2 and CO 2 , CO 2 molecules could form hydrogen bonds and react with prepared adsorbent, but there was no strong interaction between N 2 and adsorbents .…”

Section: Resultssupporting

confidence: 78%

“…Moreover, for OAC-500-2.5, the calculated selectivity was 15.7 at 1 bar and mixture (CO 2 : N 2 = 15:85), which was similar or higher to those of Ndoped adsorbents published recently. 37,38 Because of the difference between N 2 and CO 2 , CO 2 molecules could form hydrogen bonds and react with prepared adsorbent, but there was no strong interaction between N 2 and adsorbents. 39 This resulted in a high CO 2 adsorption and low N 2 adsorption.…”

Section: Co 2 Adsorption Propertiesmentioning

confidence: 99%

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One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

et al. 2020

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Summary Porous carbon materials have been widely used for CO2 adsorption, but their preparation was subject to conditions such as raw material cost, activator corrosion, and temperature. In this study, nitrogen‐doped porous carbonaceous adsorbents were prepared in a low temperature region (400‐550°C) by one‐step composite nitrogen doping method, using low‐cost oil residue as raw materials and less corrosive NaNH2 as activator. The CO2 adsorption performances of the prepared N‐doped porous adsorbents were systematically explored. The results showed that optimal oil residue‐derived carbonaceous adsorbent owned excellent amount of CO2 adsorption up to 3.51 and 5.63 mmol/g at 298 and 273 K under 1 bar, respectively. It was discovered that the congenerous influences of porous structure, nitrogen content and Vn of the adsorbent affected their CO2 adsorption performances under 1 bar. Importantly, these oil residue porous carbonaceous adsorbent also was verified owning fine selectivity of the CO2 over N2 (15.7), which attributed to its high Vn and nitrogen content. Furthermore, optimal sample OAC‐500‐2.5 owned medium Qst (21‐26 kJ/mol), which was beneficial practical application. This work may inspire new sparks on novel nitrogen‐doped adsorbent with inexpensive precursor, low activation temperature and simple preparative tactic, indicating that the nitrogen‐doped sample is promising in the practical situation of CO2 adsorption.

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Section: Resultssupporting

confidence: 78%

Section: Co 2 Adsorption Propertiesmentioning

confidence: 99%

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

et al. 2020

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“…). [32][33][34][35] Fig. 4d shows that the ASC retained 91% from 2 to 10 mA cm À2 indicating a great rate capability, in accordance with the CV curves of different scan rates.…”

Section: Resultssupporting

confidence: 62%

Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti₃C₂T_x paper

Chen

Zhou

et al. 2019

RSC Adv.

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“…These areal capacitances are several orders of magnitude of commercially available carbon fiber cloth with a very low areal capacitance 43 (only 13 mF cm −2 at 1 mA cm −2 ) 44 . The areal capacitance C a value of 1846 mF cm −2 (at 1 mA cm −2 ) is more than twice of that for molten-NaNH 2 activated carbon cloth (744.5 mF cm −2 at 1 mA cm −2 ) 45 , ten times of that for N-doped carbon nanotubes (180 mF cm −2 at 0.5 mA cm −2 ) 46 and 14 times of that for N-doped carbon cloth (136 mF cm −2 at 0.5 mA cm −2 ) 47 . This implies that the enhanced capacitance is mainly attributed to the significant contribution of pseudocapacitive Fe 2 O 3 nanobelt arrays.…”

Section: Discussionmentioning

confidence: 84%

“…Also, this value is higher than three times of those for Fe 2 O 3 nanorods@graphene foam on Ni foam (572 mF cm −2 ) 49 , Fe 2 O 3 nanorods@NiO nanosheets on carbon cloth (557 mF cm −2 ) 15 , and Fe 2 O 3 nanoparticles@graphene foam-CNT (470.5 mF cm −2 ) 50 . The data for the performance comparison are shown in Table S1 15,27,[44][45][46][47][48][49][50] .…”

Section: Discussionmentioning

confidence: 99%

Iron oxides nanobelt arrays rooted in nanoporous surface of carbon tube textile as stretchable and robust electrodes for flexible supercapacitors with ultrahigh areal energy density and remarkable cycling-stability

Ding

Tang

Han

et al. 2020

Sci Rep

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We report a significant advance toward the rational design and fabrication of stretchable and robust flexible electrodes with favorable hierarchical architectures constructed by homogeneously distributed α-fe 2 o 3 nanobelt arrays rooted in the surface layer of nanoporous carbon tube textile (NPCTT). New insight into alkali activation assisted surface etching of carbon and in-situ catalytic anisotropic growth is proposed, and is experimentally demonstrated by the synthesis of the fe 2 o 3 nanobelt arrays/npctt. the fe 2 o 3 /NPCTT electrode shows excellent flexibility and great stretchability, especially has a high specific areal capacitance of 1846 mF cm −2 at 1 mA cm −2 and cycling stability with only 4.8% capacitance loss over 10,000 cycles at a high current density of 20 mA cm −2. A symmetric solid-state supercapacitor with the fe 2 o 3 /NPCTT achieves an operating voltage of 1.75 V and a ultrahigh areal energy density of 176 µWh cm −2 (at power density of 748 µW cm −2), remarkable cycling stability, and outstanding reliability with no capacity degradation under repeated large-angle twisting. Such unique architecture improves both mechanical robustness and electrical conductivity, and allows a strong synergistic attribution of fe 2 o 3 and npctt. the synthetic method can be extended to other composites such as Mno nanosheet arrays/npctt and co 3 o 4 nanowire arrays/ NPCTT. This work opens up a new pathway to the design of high-performance devices for wearable electronics. The urgent demand for solving the future energy crisis and increasing environmental concerns has motivated the development of high-performance green energy conversion and storage devices. Among various emerging energy storage technologies, supercapacitors (SCs), which bridge the gap between conventional dielectric capacitors (with high power output) and batteries (with high energy storage), are currently attracting significant attention due to their high power density, fast charge-discharge rate, and long cycle life 1-3. However, one of the key challenges that limits SCs' practical applications is to increase their areal/volumetric energy density to the value approaching to or even exceeding that of conventional batteries without sacrificing other performance 4-7. On the other side, next-generation electronics are expected to be flexible and wearable 8-10 , it is thus highly required to develop flexible advanced electrode materials with favorable architectures allowing large porosity,

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Molten-NaNH2 activated carbon cloth with high areal capacitance and exceptional rate stability for flexible asymmetric supercapacitors

Cited by 20 publications

References 42 publications

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti₃C₂T_x paper

Iron oxides nanobelt arrays rooted in nanoporous surface of carbon tube textile as stretchable and robust electrodes for flexible supercapacitors with ultrahigh areal energy density and remarkable cycling-stability

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Molten-NaNH2 activated carbon cloth with high areal capacitance and exceptional rate stability for flexible asymmetric supercapacitors

Cited by 20 publications

References 42 publications

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO 2 capture

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO 2 capture

Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti3C2Tx paper

Iron oxides nanobelt arrays rooted in nanoporous surface of carbon tube textile as stretchable and robust electrodes for flexible supercapacitors with ultrahigh areal energy density and remarkable cycling-stability

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One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

One‐pot synthesis of high N‐doped porous carbons derived from a N‐rich oil palm biomass residue in low temperature for CO ₂ capture

Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti₃C₂T_x paper