Advanced sodium-ion pseudocapacitor performance of oxygen-implanted hard carbon derived from carbon spheres

Yin, Li; Feng, Junlan; Zhang, Xuehua; Liu, Lin; Liu, Jianshuang; He, Hongbo; Lin, Yongxing

doi:10.1007/s10853-018-3111-9

Cited by 16 publications

(8 citation statements)

References 56 publications

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“…Table shows the comparison of specific energy, specific power, and cycle life of the carbon electrode-based sodium-ion ultracapacitors reported in the literature with present data. It is seen that the specific energy and specific power observed in the present work are higher than most of the reported values. − Such high specific energy and specific power of the biocarbon are ascribed to a high surface area, hierarchical porous nature, and presence of pyrrolic nitrogen, which facilitated better ion/e – transports.…”

Section: Resultscontrasting

confidence: 55%

Pyrrolic-Nitrogen-Containing Hierarchical Porous Biocarbon for Enhanced Sodium-Ion Energy Storage

et al. 2021

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Acacia auriculiformis seedpod biomass-derived activated biocarbon was generated by carbonization followed by chemical activation using KOH. The formation of the biocarbon having hierarchical porous, pyrrolic nitrogen and high surface area has been confirmed using material characterization techniques. Then, sodium-ion energy storage performances of the biocarbon was examined in the half-cell that resulted in 255 mAh g −1 as the discharge capacity at 0.1 C rate with passable rate capability and cycling stability. Further, the activated biocarbon was also tested as the electrode material for symmetric sodium-ion ultracapacitors in aqueous and non-aqueous electrolytes. The aqueous ultracapacitor exhibited an energy density of nearly 62 Wh kg −1 , while the nonaqueous ultracapacitor resulted in a high specific energy of 138 Wh kg −1 . When assembled in a laboratory prototype pouch cell, the activated biocarbon electrode showed a high specific energy (150 Wh kg −1 ) at a specific power of 1495 W kg −1 . The disordered porous nitrogen-containing biocarbon associated with a high surface area leads to efficient sodium-ion storage as well as double-layer capacitance. The fabricated laboratory prototype sodium-ion ultracapacitor was practically tested to power a conventional red light-emitting diode for about 20 min on a single charge.

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Section: Resultscontrasting

confidence: 55%

Pyrrolic-Nitrogen-Containing Hierarchical Porous Biocarbon for Enhanced Sodium-Ion Energy Storage

et al. 2021

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“…In previous studies, the revealed Na + storage mechanisms induced by oxygen functional groups include introducing oxygen-containing groups into graphene sheets to expand the interlayer distance and enhance Na + insertion; introducing oxygen functional groups (e.g., C–O and CO) into the surface of graphene to provide active sites and promote redox reaction with Na + ; ,, and modifying oxygen functional groups as adsorption sites to enhance sodium ion adsorption . Based on the above characterizations, as compared with BHC-CO 2 , BHC-N 2 shows similar structural characters (containing porosity, d -spacing, and microcrystal), a high C–O (phenol, hydroxyl, and ether, 46.6 at.…”

Section: Resultsmentioning

confidence: 91%

Oxygen Functional Group Modification of Cellulose-Derived Hard Carbon for Enhanced Sodium Ion Storage

Wang

Sun

et al. 2019

ACS Sustainable Chem. Eng.

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Oxygen-containing groups in carbon materials have been demonstrated to be effective in the anodic sodium-ion storage process; however, the effect of specific oxygen-containing groups on the sodium-ion storage in the carbon framework remains to be explored. Based on a mechanochemical process (exemplified by ball milling in the presence of dry ice), a selectively modified cellulose-derived hard carbon (BHC-CO2) with a high oxygen content of 19.33 at. % and carboxyl-dominant groups was prepared in this work. The fabricated BHC-CO2 anode exhibits excellent electrochemical performance with a high reversible capacity of 293.5 mA h g–1 at a current density of 0.05 A g–1, two times as high as that of the oxygen-deficient BHC-CO2-H2 anode, demonstrating the significant role of oxygen-containing groups in enhancing the Na+ storage. Moreover, the BHC-CO2 anode has an excellent high-rate cycling stability with a specific capacity of 80.0 mA h g–1 even after 2000 cycles at 1 A g–1. Qualitative analyses of capacitive effect combined with density functional theory calculations further reveal that carboxyl groups introduced by the mechanochemical process facilitate Na+ adsorption on the carbon surface, enhancing the capacitive Na+ storage process and thus greatly improving the capacity. This work demonstrates the role of carboxyl on Na+ storage by carbonaceous materials and provides theoretical guidance for the oxygen functional group modification of carbon materials to enhance the sodium-ion storage.

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Section: Materials Of Sodium‐ion Capacitors Cell Configurationsmentioning

confidence: 99%

“…Another method of obtaining CSs derived from activated hard carbon (AHC) was proposed by Yin et al. [ 114 ] The XRD pattern of the AHC exhibited evident amorphous structure. According to the deconvoluted areas of individual D and G peaks, I D /I G in the Raman spectrum was estimated to be 2.91, suggesting the amorphous and disordered structure of the AHC.…”

Section: Materials Of Sodium‐ion Capacitors Cell Configurationsmentioning

confidence: 99%

Comprehensive Understanding of Sodium‐Ion Capacitors: Definition, Mechanisms, Configurations, Materials, Key Technologies, and Future Developments

Cai

Zou

Deng

et al. 2021

Advanced Energy Materials

132

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In the past 10 years, preeminent achievements and outstanding progress have been achieved on sodium‐ion capacitors (SICs). Early work on SICs focussed more on the electrochemical performance. While it is easy to confirm which specific electrodes exhibit excellent properties, it is difficult to understand the mechanisms which are most promising for the next generation of SICs. From the early research in supercapacitors iterations to the present well‐developed Na‐ion batteries, the evolution of the controversial pseudocapacitive mechanism for SICs has been full of breakthroughs and back tracing steps. Moreover, as the research has progressed and the interests have changed, different emphases on the different subdisciplines (cell configurations, flexible devices, and presodiation technologies) have increased. In this review, first, the electric double layer mechanism, battery‐type mechanism, and the controversial pseudocapacitance mechanism are systematically analyzed and compared. Subsequently, mechanism‐oriented SICs cell configurations with different cathode and anode mechanisms are discussed. Moreover, the characteristics and features of electrode materials in different SICs cell configurations are summarized. Finally, key technologies and possible future developments are discussed. This review summarizes SICs from a broad and macro perspective from mechanisms to cell configurations, from cathodes to anodes, and from history to future, and offers a deep understanding of SICs devices.

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Advanced sodium-ion pseudocapacitor performance of oxygen-implanted hard carbon derived from carbon spheres

Cited by 16 publications

References 56 publications

Pyrrolic-Nitrogen-Containing Hierarchical Porous Biocarbon for Enhanced Sodium-Ion Energy Storage

Pyrrolic-Nitrogen-Containing Hierarchical Porous Biocarbon for Enhanced Sodium-Ion Energy Storage

Oxygen Functional Group Modification of Cellulose-Derived Hard Carbon for Enhanced Sodium Ion Storage

Comprehensive Understanding of Sodium‐Ion Capacitors: Definition, Mechanisms, Configurations, Materials, Key Technologies, and Future Developments

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