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nanofibers derived from bio-based phenolic resins as free-standing electrodes for high-performance supercapacitors

《化学科学与工程前沿（英文）》 2023年 第17卷 第5期   页码 504-515 doi: 10.1007/s11705-022-2260-1

摘要： Phenolic resins were employed to prepare electrospun porous carbon nanofibers with a high specific surface area as free-standing electrodes for high-performance supercapacitors. However, the sustainable development of conventional phenolic resin has been challenged by petroleum-based phenol and formaldehyde. Lignin with abundant phenolic hydroxyl groups is the main non-petroleum resource that can provide renewable aromatic compounds. Hence, lignin, phenol, and furfural were used to synthesize bio-based phenolic resins, and the activated carbon nanofibers were obtained by electrospinning and one-step carbonization activation. Fourier transform infrared and differential scanning calorimetry were used to characterize the structural and thermal properties. The results reveal that the apparent activation energy of the curing reaction is 89.21 kJ·mol–1 and the reaction order is 0.78. The activated carbon nanofibers show a uniform diameter, specific surface area up to 1100 m2·g–1, and total pore volume of 0.62 cm3·g–1. The electrode demonstrates a specific capacitance of 238 F·g–1 (0.1 A·g–1) and good rate capability. The symmetric supercapacitor yields a high energy density of 26.39 W·h·kg–1 at 100 W·kg–1 and an excellent capacitance retention of 98% after 10000 cycles. These results confirm that the activated carbon nanofiber from bio-based phenolic resins can be applied as electrode material for high-performance supercapacitors.

关键词： lignin     bio-based phenolic resins     electrospinning     activated carbon nanofibers     supercapacitors    

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High-performance supercapacitors based on Ni

Yunrui Tian, Haishun Du, Shatila Sarwar, Wenjie Dong, Yayun Zheng, Shumin Wang, Qingping Guo, Jujie Luo, Xinyu Zhang

《化学科学与工程前沿（英文）》 2021年 第15卷 第4期   页码 1021-1032 doi: 10.1007/s11705-020-2006-x

摘要： We present a one-step route for the preparation of nickel phosphide/carbon nanotube (Ni P@CNT) nanocomposites for supercapacitor applications using a facile, ultrafast (90 s) microwave-based approach. Ni P nanoparticles could grow uniformly on the surface of CNTs under the optimized reaction conditions, namely, a feeding ratio of 30:50:25 for CNT, Ni(NO ) ·6H O, and red phosphorus and a microwave power of 1000 W for 90 s. Our study demonstrated that the single-step microwave synthesis process for creating metal phosphide nanoparticles was faster and simpler than all the other existing methods. Electrochemical results showed that the specific capacitance of the optimal Ni P@CNT-nanocomposite electrode displayed a high specific capacitance of 854 F·g at 1 A·g and a superior capacitance retention of 84% after 5000 cycles at 10 A·g . Finally, an asymmetric supercapacitor was assembled using the nanocomposite with activated carbon as one electrode (Ni P@CNT//AC), which showed a remarkable energy density of 33.5 W·h·kg and a power density of 387.5 W·kg . This work will pave the way for the microwave synthesis of other transition metal phosphide materials for use in energy storage systems.

关键词： Ni2P     CNT     supercapacitors     nanocomposites     microwave    

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nanoflake arrays on cellulose-derived carbon nanofibers as a freestanding electrode for high-performance supercapacitors

《化学科学与工程前沿（英文）》 2023年 第17卷 第6期   页码 691-703 doi: 10.1007/s11705-022-2268-6

摘要： Cellulose has a wide range of applications in many fields due to their naturally degradable and low-cost characteristics, but few studies can achieve cellulose-nanofibers by conventional electrospinning. Herein, we demonstrate that the freestanding cellulose-based carbon nanofibers are successfully obtained by a special design of electrospinning firstly, pre-oxidation and high-temperature carbonization (1600 °C), which display a superior electrical conductivity of 31.2 S·cm–1 and larger specific surface area of 35.61 m2·g–1 than that of the polyacrylonitrile-based carbon nanofibers (electrical conductivity of 18.5 S·cm–1, specific surface area of 12 m2·g–1). The NiCo2O4 nanoflake arrays are grown uniformly on the cellulose-based carbon nanofibers successfully by a facile one-step solvothermal and calcination method. The as-prepared cellulose-based carbon nanofibers/NiCo2O4 nanoflake arrays are directly used as electrodes to achieve a high specific capacitance of 1010 F·g–1 at 1 A·g–1 and a good cycling stability with 90.84% capacitance retention after 3000 times at 10 A·g–1. Furthermore, the all-solid-state symmetric supercapacitors assembled from the cellulose-based carbon nanofibers/NiCo2O4 deliver a high energy density of 62 W·h·kg–1 at a power density of 1200 W·kg–1. Six all-solid-state symmetric supercapacitors in series can also power a ‘DHU’ logo consisted of 36 light emitting diodes, confirming that the cellulose-based carbon nanofiber is a promising carbon matrix material for energy storage devices.

关键词： cellulose     carbon nanofibers     NiCo2O4     supercapacitors    

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Size-controllable synthesis of monodispersed nitrogen-doped carbon nanospheres from polydopamine for high-rate supercapacitors

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1788-1800 doi: 10.1007/s11705-023-2326-8

摘要： Monodispersed nitrogen-doped carbon nanospheres with tunable particle size (100–230 nm) were synthesized via self-polymerization of biochemical dopamine in the presence of hexamethylenetetramine as a buffer and F127 as a size controlling agent. Hexamethylenetetramine can mildly release NH3, which in turn initiates the polymerization reaction of dopamine. The carbon nanospheres obtained exhibited a significant energy storage capability of 265 F·g–1 at 0.5 A·g–1 and high-rate performance of 82% in 6 mol·L–1 KOH (20 A·g–1), which could be attributed to the presence of abundant micro-mesoporous structure, doped nitrogen functional groups and the small particle size. Moreover, the fabricated symmetric supercapacitor device displayed a high stability of 94% after 5000 cycles, revealing the considerable potential of carbon nanospheres as electrode materials for energy storage.

关键词： carbon nanospheres     size-controlled     nitrogen-doped     high-rate     supercapacitors    

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Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

《化学科学与工程前沿（英文）》 2023年 第17卷 第4期   页码 387-394 doi: 10.1007/s11705-022-2250-3

摘要： Porous carbons with high specific area surfaces are promising electrode materials for supercapacitors. However, their production usually involves complex, time-consuming, and corrosive processes. Hence, a straightforward and effective strategy is presented for producing highly porous carbons via a self-activation procedure utilizing zinc gluconate as the precursor. The volatile nature of zinc at high temperatures gives the carbons a large specific surface area and an abundance of mesopores, which avoids the use of additional activators and templates. Consequently, the obtained porous carbon electrode delivers a satisfactory specific capacitance and outstanding cycling durability of 90.9% after 50000 cycles at 10 A∙g–1. The symmetric supercapacitors assembled by the optimal electrodes exhibit an acceptable rate capability and a distinguished cycling stability in both aqueous and ionic liquid electrolytes. Accordingly, capacitance retention rates of 77.8% and 85.7% are achieved after 50000 cycles in aqueous alkaline electrolyte and 10000 cycles in ionic liquid electrolyte. Moreover, the symmetric supercapacitors deliver high energy/power densities of 49.8 W∙h∙kg–1/2477.8 W∙kg–1 in the Et4NBF4 electrolyte, outperforming the majority of previously reported porous carbon-based symmetric supercapacitors in ionic liquid electrolytes.

关键词： self-activation     zinc organic salts     abundant mesopores     symmetric supercapacitor     liquid electrolyte    

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Polyaniline‒polypyrrole nanocomposites using a green and porous wood as support for supercapacitors

Jian LI, Yue JIAO

《农业科学与工程前沿（英文）》 2019年 第6卷 第2期   页码 137-143 doi: 10.15302/J-FASE-2019257

摘要：

Wood is an ideal type of support material whose porous structure and surface functional groups are beneficial for deposition of various guest substances for different applications. In this paper, wood is employed as a porous support, combined with two kinds of conductive polymers (i.e., polyaniline (PANI) and polypyrrole (PPy)) using an easy and fast liquid polymerization method. Scanning electron microscope observations indicate that the PANI‒PPy complex consists of nanoparticles with a size of ~20 nm. The interactions between oxygen-containing groups in the wood and the nitrogen composition of PANI‒PPy were verified by Fourier transform infrared spectroscopy. The self-supported PANI‒PPy/wood composite is capable of acting as a free-standing supercapacitor electrode, which delivers a high gravimetric specific capacitance of 360 F·g at 0.2 A·g .

关键词： wood     polypyrrole     polyaniline     supercapacitors     nanocomposites    

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Nickel nanopore arrays as promising current collectors for constructing solid-state supercapacitors with

Huaping Zhao, Long Liu, Yaoguo Fang, Ranjith Vellacheri, Yong Lei

《化学科学与工程前沿（英文）》 2018年 第12卷 第3期   页码 339-345 doi: 10.1007/s11705-018-1699-6

摘要：

In this work, nickel nanopore arrays with a highly-oriented nanoporous structure inherited from porous alumina membranes were used as nanostructured current collectors for constructing ultrahigh rate solid-state supercapacitors. A thin layer of poly(3,4-ethylenedioxythiophene) (PEDOT) as electroactive materials was conformally coated onto nickel nanopores to form heterostructured electrodes. The as-prepared electrodes have a large specific surface area to ensure a high capacity, and the highly-oriented nanoporous structure of nickel nanopores reduces the ion transport resistance, allowing the ions in the solid-state electrolytes to quickly access the PEDOT surface during the fast charge-discharge process. As a result, the assembled solid-state supercapacitor in a symmetric configuration exhibits an ideal capacitive behavior and a superior rate capability even at an ultrahigh scan rate of 50 V·s−1.

关键词： supercapacitor     ultrahigh rate     metallic nanopore arrays     current collectors     PEDOT    

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A pseudocapacitive molecule-induced strategy to construct flexible high-performance asymmetric supercapacitors

《化学科学与工程前沿（英文）》 2023年 第17卷 第9期   页码 1208-1220 doi: 10.1007/s11705-023-2304-1

摘要： The combination of high-voltage windows and bending stability remains a challenge for supercapacitors. Here, we present an “advantage-complementary strategy” using sodium lignosulfonate as a pseudocapacitive molecule to regulate the spatial stacking pattern of graphene oxide and the interfacial architectures of graphene oxide and polyaniline. Flexible and sustainable sodium lignosulfonate-based electrodes are successfully developed, showing perfect bending stability and high electronic conductivity and specific capacitance (521 F·g−1 at 0.5 A·g–1). Due to the resulting rational interfacial structure and stable ion-electron transport, the asymmetric supercapacitors provide a wide voltage window reaching 1.7 V, outstanding bending stability and high energy-power density of 83.87 Wh·kg–1 at 3.4 kW·kg–1. These properties are superior to other reported cases of asymmetric energy enrichment. The synergistic strategy of sodium lignosulfonate on graphene oxide and polyaniline is undoubtedly beneficial to advance the process for the construction of green flexible supercapacitors with remarkably wide voltage windows and excellent bending stability.

关键词： molecular synergy     pseudocapacitive lignosulfonate     flexible electronic devices     asymmetric supercapacitor     wide voltage windows    

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Recovery and reuse of floc sludge for high-performance capacitors

《环境科学与工程前沿（英文）》 2022年 第16卷 第6期 doi: 10.1007/s11783-021-1512-5

摘要：

• The feasibility of facile fabrication of capacitor from floc sludge is discussed.

关键词： Floc sludge     Porous carbon electrode     Energy storage performance     Supercapacitors    

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Fabricating sustainable lignin-derived porous carbon as electrode for high-performance supercapacitors

《化学科学与工程前沿（英文）》 2023年 第17卷 第8期   页码 1065-1074 doi: 10.1007/s11705-023-2313-0

摘要： Lignocellulosic biomass such as plants and agricultural waste are ideal to tackle the current energy crisis and energy-related environmental issues. Carbon-rich lignin is abundant in lignocellulosic biomass, whose high-value transformation and utilization has been the most urgent problem to be solved. Herein, we propose a method for the preparation of porous carbon from lignin employing an H3PO4-assisted hydrothermal method. We characterize the as-prepared lignin-derived porous carbon and investigate its potential for energy storage. After assisted hydrothermal treatment followed by carbonization at 800 °C, the lignin-derived porous carbon displays a high specific capacitance (223.6 F·g–1 at 0.1 A·g–1) and excellent cycling ability with good capacitance retention. In this present study, the resultant lignin-derived porous carbon was used as the electrode of a supercapacitor, illustrating yet another potential high-value use for lignin, namely as a candidate for the sustainable fabrication of main supercapacitor components.

关键词： lignin     porous carbon     electrode     supercapacitor    

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Tripotassium citrate monohydrate derived carbon nanosheets as a competent assistant to manganese dioxide with remarkable performance in the supercapacitor

《化学科学与工程前沿（英文）》 2022年 第16卷 第3期   页码 420-432 doi: 10.1007/s11705-021-2065-7

摘要： Production cost, capacitance, and electrode materials safety are the key factors to be concerned about for supercapacitors. In this work, a type of carbon nanosheets was produced through the carbonization of tripotassium citrate monohydrate and nitric acidification. Subsequently, a well-designed manganese dioxide/carbon nanosheets composite was synthesized through hydrothermal treating. The carbon nanosheets served as the substrate for growing the manganese dioxide, regulating its distribution, and preventing it from inhomogeneous dimensions and severe agglomeration. Many manganese dioxide nanosheets grew vertically on the numerous functional groups generated on the surface of the carbon nanosheets during acidification. The synergistic combination of carbon nanosheets and manganese dioxide tailors the electrochemical performance of the composite, which benefits from the excellent conductivity and stability of carbon nanosheets. The carbon nanosheets derived from tripotassium citrate monohydrate are conducive to the remarkable performance of manganese dioxide/carbon nanosheets electrode. Finally, an asymmetric supercapacitor with active carbon as the cathode and manganese dioxide/carbon nanosheets as the anode was assembled, achieving an outstanding energy density of 54.68 Wh·kg–1 and remarkable power density of 6399.2 W·kg–1 superior to conventional lead-acid batteries. After 10000 charge-discharge cycles, the device retained 75.3% of the initial capacitance, showing good cycle stability. Two assembled asymmetric supercapacitors in series charged for 3 min could power a yellow light emitting diode with an operating voltage of 2 V for 2 min. This study may provide valuable insights for applying carbon materials and manganese dioxide in the energy storage field.

关键词： carbon nanosheets     manganese dioxide     asymmetric supercapacitors     energy density     power density    

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A mini review: Functional nanostructuring with perfectly-ordered anodic aluminum oxide template for energy conversion and storage

Huaping Zhao, Long Liu, Yong Lei

《化学科学与工程前沿（英文）》 2018年 第12卷 第3期   页码 481-493 doi: 10.1007/s11705-018-1707-x

摘要：

Nanostructures have drawn great attentions for functional device applications. Among the various techniques developed for fabricating arrayed nanostructures of functional materials, nanostructuring technique with porous anodic aluminum oxide (AAO) membrane as templates becomes more attractive owing to the superior geometrical characteristics and low-cost preparation process. In this mini review, we summarize our recent progress about functional nanostructuring based on perfectly-ordered AAO membrane to prepare perfectly-ordered nanostructure arrays of functional materials toward constructing high-performance energy conversion and storage devices. By employing the perfectly-ordered AAO membrane as templates, arrayed nanostructures in the form of nanodot, nanorod, nanotube and nanopore have been synthesized over a large area. These as-obtained nanostructure arrays have large specific surface area, high regularity, large-scale implementation, and tunable nanoscale features. All these advanced features enable them to be of great advantage for the performance improvement of energy conversion and storage devices, including photoelectrochemical water splitting cells, supercapacitors, and batteries, etc.

关键词： nanostructuring     perfectly-ordered AAO template     photoelectrochemical water splitting     sodium-ion batteries     supercapacitors    

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CC@BCN@PANI core-shell nanoarrays as ultra-high cycle stability cathode for Zn-ion hybrid supercapacitors

《能源前沿（英文）》 2023年 第17卷 第4期   页码 555-566 doi: 10.1007/s11708-023-0882-8

摘要： Exploring cathode materials that combine excellent cycling stability and high energy density poses a challenge to aqueous Zn-ion hybrid supercapacitors (ZHSCs). Herein, polyaniline (PANI) coated boron-carbon-nitrogen (BCN) nanoarray on carbon cloth surface is prepared as advanced cathode materials via simple high-temperature calcination and electrochemical deposition methods. Because of the excellent specific capacity and conductivity of PANI, the CC@BCN@PANI core-shell nanoarrays cathode shows an excellent ion storage capability. Moreover, the 3D nanoarray structure can provide enough space for the volume expansion and contraction of PANI in the charging/discharging cycles, which effectively avoids the collapse of the microstructure and greatly improves the electrochemical stability of PANI. Therefore, the CC@BCN@PANI-based ZHSCs exhibit superior electrochemical performances showing a specific capacity of 145.8 mAh/g, a high energy density of 116.78 Wh/kg, an excellent power density of 12 kW/kg, and a capacity retention rate of 86.2% after 8000 charge/discharge cycles at a current density of 2 A/g. In addition, the flexible ZHSCs (FZHSCs) also show a capacity retention rate of 87.7% at the current density of 2 A/g after 450 cycles.

关键词： CC@BCN@PANI cathode     Zn-ion hybrid supercapacitor     core-shell nanoarrays     high energy density     ultra-high cycle stability    

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石墨烯基超级电容器的发展现状与战略研究

陈静,郭红霞,毛卫国,刘剑洪,付永胜,欧阳晓平

《中国工程科学》 2018年 第20卷 第6期   页码 75-81 doi: 10.15302/J-SSCAE-2018.06.012

摘要：

超级电容器兼具普通电容器和化学电池的优点，具有功率密度高、可快速充放电、循环寿命长等显著优势。电极材料是发展具有优异性能超级电容器的关键材料。石墨烯凭借其优异的力学、电学、热学等性能成为超级电容器理想的电极材料。本文首先基于对石墨烯基超级电容器相关学术论文、专利的统计分析，讨论了石墨烯基超级电容器的发展现状与方向；其次，简要阐述了石墨烯基超级电容器在国内的产业发展现状，讨论了石墨烯基超级电容器未来发展所面临的难点与挑战，并在此基础上提出了未来发展的方向与建议。

关键词： 石墨烯     超级电容器     电极材料     功率密度     能量密度    

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标题 作者 时间 类型 操作

nanofibers derived from bio-based phenolic resins as free-standing electrodes for high-performance supercapacitors

期刊论文

High-performance supercapacitors based on Ni

Yunrui Tian, Haishun Du, Shatila Sarwar, Wenjie Dong, Yayun Zheng, Shumin Wang, Qingping Guo, Jujie Luo, Xinyu Zhang

期刊论文

nanoflake arrays on cellulose-derived carbon nanofibers as a freestanding electrode for high-performance supercapacitors

期刊论文

Size-controllable synthesis of monodispersed nitrogen-doped carbon nanospheres from polydopamine for high-rate supercapacitors

期刊论文

Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

期刊论文

Polyaniline‒polypyrrole nanocomposites using a green and porous wood as support for supercapacitors

Jian LI, Yue JIAO

期刊论文

Nickel nanopore arrays as promising current collectors for constructing solid-state supercapacitors with

Huaping Zhao, Long Liu, Yaoguo Fang, Ranjith Vellacheri, Yong Lei

期刊论文

A pseudocapacitive molecule-induced strategy to construct flexible high-performance asymmetric supercapacitors

期刊论文

Recovery and reuse of floc sludge for high-performance capacitors

期刊论文

Fabricating sustainable lignin-derived porous carbon as electrode for high-performance supercapacitors

期刊论文

Tripotassium citrate monohydrate derived carbon nanosheets as a competent assistant to manganese dioxide with remarkable performance in the supercapacitor

期刊论文

A mini review: Functional nanostructuring with perfectly-ordered anodic aluminum oxide template for energy conversion and storage

Huaping Zhao, Long Liu, Yong Lei

期刊论文

CC@BCN@PANI core-shell nanoarrays as ultra-high cycle stability cathode for Zn-ion hybrid supercapacitors

期刊论文

石墨烯基超级电容器的发展现状与战略研究

陈静,郭红霞,毛卫国,刘剑洪,付永胜,欧阳晓平

期刊论文