N/S-Co-Doped Porous Carbon Sheets Derived from Bagasse as High-Performance Anode Materials for Sodium-Ion Batteries

Wang, Lili; Hu, Lei; Yang, Wei; Liang, Dewei; Liu, Lingli; Liang, Sheng; Yang, Caoyu; Fang, Zezhong; Dong, Qiang; Deng, Chonghai

doi:10.3390/nano9091203

Cited by 17 publications

(13 citation statements)

References 38 publications

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“…The corresponding fitted parameters of equivalent circuits are shown in Table S4, Supporting Information). It is notable that NBT700 has the smallest semicircle ( R ct = 14.3 Ω) due to large surface area, enlarged interlayer space and ultrathin nanosheets structure, implying the fastest charge‐transfer process 12,27. The galvanostatic intermittent titration technique (GITT) was applied to investigate the diffusivity coefficient of Na + for NBT700 and NDC at 0.05 A g −1 with a pulse current for 0.5 h between rest intervals for 1 h (Figure 5b).…”

Section: Resultsmentioning

confidence: 99%

Tailoring 2D Heteroatom‐Doped Carbon Nanosheets with Dominated Pseudocapacitive Behaviors Enabling Fast and High‐Performance Sodium Storage

Jin

Wang

et al. 2020

Adv Funct Materials

106

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2D carbon nanosheets are considered to be promising candidates for use as sodium ion battery (SIB) anodes due to their large specific surface area and excellent electronic conductivity. However, their applications are hampered by inferior cycling performance, insufficient storage capacity, and high cost. N, B co‐doping carbon nanosheets (NBTs) are synthesized using biomass‐based gelatin as carbon precursor and boric acid as template, and demonstrate their great potential as high‐performance SIB anodes in practical applications. The synergistic effect of heteroatom doping and ultrathin 2D structure provides the NBTs with abundant defects, active sites, and short ion/electron transfer distance, which favors and improves the storage capabilities and rate performances. The optimized NBTs present a remarkable cyclability and superb rate capability (309 mAh g−1 at 0.2 A g−1 for 200 cycles; 225 mAh g−1 at 1 A g−1 for 2000 cycles). Meanwhile, the Na storage mechanism is proved to be a pseudocapacitive‐controlled process, which accounts for the fast charge/discharge behaviors. This work demonstrates an effective template method to produce 2D heteroatoms co‐doping carbon nanosheets to achieve excellent Na storage performances.

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Section: Resultsmentioning

confidence: 99%

Tailoring 2D Heteroatom‐Doped Carbon Nanosheets with Dominated Pseudocapacitive Behaviors Enabling Fast and High‐Performance Sodium Storage

Jin

Wang

et al. 2020

Adv Funct Materials

106

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“…[ 40 ] Moreover, the heteroatom of sulfur is also offered to improve electrode kinetics by creating CSC covalent bond, and given additional active sites for Li + , it improves the reversible capacity by affecting the interlayering of carbon. [ 41 ] For example, recently, Jiang and coworkers [ 37 ] prepared sulfur‐doped honeycomb‐like 3D porous carbon (SHC) using bagasse waste as the carbon source and elemental sulfur as S source. Initially, biogases waste was heated at 300 °C for 2 h, and after that, this material was mixed with elemental sulfur then heated at 800 °C for 2 h under argon atmosphere.…”

Section: Resultsmentioning

confidence: 99%

Sulfur‐Implanted Carbon Dots‐Embedded Graphene as Ultrastable Anode for Li‐Ion Batteries

et al. 2021

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Sulfur doping in carbonaceous materials is an effective approach to improve the performance of Li‐ion batteries (LIBs). Herein, sulfur‐implanted carbon dots‐embedded graphene (S‐CDs/rGO) as an anode material for LIBs is reported. A facile method is used to prepare S‐CDs/rGO by annealing the mixture of benzyl disulfide (BDS) and graphene oxide (GO). Herein, BDS serves as both the sulfur source and precursor of CDs. S‐CDs/rGO as an anode material for LIB delivers initial specific capacities of 938.8 mAh g−1 (first cycle) and 598.6 mAh g−1 (second cycle) at a current density of 100 mA g−1. S‐CDs/rGO exhibits superior cycling performance with good capacity retentions of 78.8% (500 cycles), 61.5% (2000 cycles), and 75.7% (2000 cycles) at higher current densities of 1000, 2000, and 3000 mA g−1, respectively. Moreover, the full cell assembly of the prepared S‐CDs/rGO as an anode and commercial LiFePO4 as a cathode in the voltage range of 1.5–3.9 V delivers a high reversible capacity of 203.3 mAh g−1 after extensive 1000 cycles at 500 mA g−1 with 51.8% retention (a low fading rate of 0.049% per cycle), rendering it as a promising anode material for application in high‐performance LIBs.

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“…The high-resolution of V 2p spectrum (Figure 3a) displays four components, corresponding to the V 2+ and V 3+ , respectively [7,23]. In Figure 3b, S 2p spectrum exhibits obvious three peaks, which can be assigned to the typical M–S (M = metal), C–S, and common S–O bonds [8,9,24,25]. However, the S 2p spectrum of VS/NSG suggested that the S-doped graphene had been affected by the presence of sulfides.…”

Section: Resultsmentioning

confidence: 99%

V3S4 Nanosheets Anchored on N, S Co-Doped Graphene with Pseudocapacitive Effect for Fast and Durable Lithium Storage

Miao

Zhou

et al. 2019

Nanomaterials

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Construction of a suitable hybrid structure has been considered an important approach to address the defects of metal sulfide anode materials. V3S4 nanosheets anchored on an N, S co-coped graphene (VS/NSG) aerogel were successfully fabricated by an efficient self-assembled strategy. During the heat treatment process, decomposition, sulfuration and N, S co-doping occurred. This hybrid structure was not only endowed with an enhanced capability to buffer the volume expansion, but also improved electron conductivity as a result of the conductive network that had been constructed. The dominating pseudocapacitive contribution (57.78% at 1 mV s−1) enhanced the electrochemical performance effectively. When serving as anode material for lithium ion batteries, VS/NSG exhibits excellent lithium storage properties, including high rate capacity (480 and 330 mAh g−1 at 5 and 10 A g−1, respectively) and stable cyclic performance (692 mAh g−1 after 400 cycles at 2 A g−1).

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N/S-Co-Doped Porous Carbon Sheets Derived from Bagasse as High-Performance Anode Materials for Sodium-Ion Batteries

Cited by 17 publications

References 38 publications

Tailoring 2D Heteroatom‐Doped Carbon Nanosheets with Dominated Pseudocapacitive Behaviors Enabling Fast and High‐Performance Sodium Storage

Tailoring 2D Heteroatom‐Doped Carbon Nanosheets with Dominated Pseudocapacitive Behaviors Enabling Fast and High‐Performance Sodium Storage

Sulfur‐Implanted Carbon Dots‐Embedded Graphene as Ultrastable Anode for Li‐Ion Batteries

V3S4 Nanosheets Anchored on N, S Co-Doped Graphene with Pseudocapacitive Effect for Fast and Durable Lithium Storage

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