Hierarchical porous carbon/Kraft lignin composite with significantly improved superior pseudocapacitive behavior

Zhou, Bingjie; Li, Zhenguo; Liu, Wei; Shao, Yuankai; Ren, Xiangzhong; Lv, Congjie; Liu, Qingling

doi:10.1016/j.electacta.2021.139307

Cited by 10 publications

(9 citation statements)

References 56 publications

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“…This should be related to the high conductivity of graphene sheet and hierarchical porosities in the structure, which is beneficial for the charge transfer through the electrode. 38 , 39 …”

Section: Resultsmentioning

confidence: 99%

Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors

et al. 2022

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Hierarchical porous heteroatom-doped carbon composites were developed by carbonization followed by KOH activation process, with natural silkworm cocoon and chemical exfoliated graphene sheets as starting materials. The introduction of graphene sheets offers more hierarchical micro/meso porosities, a low charge-transfer resistance, and a large BET surface area of ∼1281.8 m 2 g –1 , which are responsible for the fast charge/discharge kinetics and the high rate capability compared with those of single silk fibroins-derived carbon materials. The silk fiber provides a high level of heteroatom functionalities (∼2.54% N and ∼21.3% O), which are desirable for high faradaic pseudocapacitance. The as-prepared carbon composite exhibited a high specific capacitance of 290 F g –1 with good rate capability and cycling stability. The symmetric supercapacitors yielded a high value of energy density of 12.9 W h kg –1 at a power density of 95 W kg –1 with a 1.45 V voltage range in 1 M KOH aqueous electrolytes.

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“…This should be related to the high conductivity of graphene sheet and hierarchical porosities in the structure, which is beneficial for the charge transfer through the electrode. 38 , 39 …”

Section: Resultsmentioning

confidence: 99%

Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors

et al. 2022

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“…KOH, as an activator, can be effectively and irreversibly inserted into the carbon lattice and swollen carbon lattice for effective etching. After washing, these pores are exposed, resulting in many micropores and small mesopores in the carbon matrix, leading to a significant change in specific surface area and pore size distribution [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

Bio-Based Carbon Materials for High-Performance Supercapacitors

Yang

et al. 2022

Nanomaterials

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Lignin, one of the components of natural plant biomass, is a rich source of carbon and has excellent potential as a valuable, sustainable source of carbon material. Low-cost lignosulfonate (LS) doped with polyaniline (PANI) has been used as a precursor to produce porous carbon. LS has a highly dispersed and sparse microstructure and can be accidentally doped with S atoms. N and S double-doped carbon can be directly synthesized with abundant mesopores and high surface area in a lamellar network using PANI as another doping source. This study explored the optimal conditions of LS/PANI material with different amounts of lignosulfonate and different carbonization temperatures. When the amount of lignosulfonate was 4 g and the carbonization temperature was 700 °C, graded porous carbon was obtained, and the electrochemical performance was the best. At 0.5 A/g, the specific capacitance reached 333.50 F/g (three-electrode system) and 242.20 F/g (two-electrode system). After 5000 charge/discharge cycles at 5 A/g, the material maintained good cycling stability and achieved a capacitance retention rate of 95.14% (three-electrode system) and 97.04% (two-electrode system). The energy and power densities of the SNC700 samples were 8.33 Wh/kg and 62.5 W/kg at 0.25 A/g, respectively, values that meet the requirements of today’s commercially available supercapacitor electrode materials, further demonstrating their good practicality. This paper provides an efficient double-doping method to prepare layered structures. Porous carbon is used for electrochemical energy storage devices.

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“…The OKL/TAC composite electrode exhibited a specific capacitance of 390 F g −1 at 0.5 A g −1 –21.9% higher than that of the KL/TAC system (322 F g −1 ) and double that of the single-phase TAC system (132 F g −1 ). Zhou et al further improved the electrochemical performance of the lignin-based composite by coupling the OKL with a hierarchical porous nitrogen-doped carbon (NC) [ 40 ]. The OKL/NC electrode exhibited good electrochemical properties arising from the synergistic effects of rapid electron transfer, efficient ion diffusion, and a large electroactive surface area.…”

Section: Fundamentals Of Ligninmentioning

confidence: 99%

Lignin-Derived Quinone Redox Moieties for Bio-Based Supercapacitors

et al. 2022

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Because of their rapid charging and discharging, high power densities, and excellent cycling life stabilities, supercapacitors have great potential for use in electric vehicles, portable electronics, and for grid frequency modulation. The growing need for supercapacitors that are both efficient and ecologically friendly has generated curiosity in developing sustainable biomass-based electrode materials and electrolytes. Lignin, an aromatic polymer with remarkable electroactive redox characteristics and a large number of active functional groups, is one such candidate for use in renewable supercapacitors. Because its chemical structure features an abundance of quinone groups, lignin undergoes various surface redox processes, storing and releasing both electrons and protons. Accordingly, lignin and its derivatives have been tested as electroactive materials in supercapacitors. This review discusses recent examples of supercapacitors incorporating electrode materials and electrolytes derived from lignin, focusing on the pseudocapacitance provided by the quinone moieties, with the goal of encouraging the use of lignin as a raw material for high-value applications. Employing lignin and its derivatives as active materials in supercapacitor electrodes and as a redox additive in electrolytes has the potential to minimize environmental pollution and energy scarcity while also providing economic benefits.

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Hierarchical porous carbon/Kraft lignin composite with significantly improved superior pseudocapacitive behavior

Cited by 10 publications

References 56 publications

Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors

Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors

Bio-Based Carbon Materials for High-Performance Supercapacitors

Lignin-Derived Quinone Redox Moieties for Bio-Based Supercapacitors

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