ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Huanyu Zhou,Gengling Liu,Jinliang Liu,Yilin Wang,Qingyun Ai,Jun Huang,Zhongyi Yuan,Licheng Tan,Yiwang Chen
Different π-conjugated sulfonate templates, including dodecylbenzenesulfonate (DBS), 2-naphthalenesulfonate (NAS), N,N’-bis(2,6-diisopropylphenyl)-perylenediimide-1,6,7,12-tetraoxyphenylsulfonate (PTS), as well as auxiliary assistance by graphene (Gra) and multi-walled carbon nanotube (MWCNT), have been utilized to investigate the polymerization behavior of 3,4-ethylenedioxythiophene (EDOT) and the influence on the corresponding morphologies and properties. PEDOT has been self-polymerized with obviously agglomeration without template. Isolated PEDOT grains with coiled shape have been formed by DBS template polymerization. More crystalline and conductive PEDOT with quinoid-conformation and ordered arrangement has been developed by utilizing template with novel π conjugated sulfonate (PTS). Most prominently, the obtained conductive PEDOT:MWCNT shows continuous interpenetrating network structure with more extended PEDOT and well-dispersed MWCNT due to π-π interaction of PEDOT with noncovalent functionalized MWCNT by electron-deficient conjugated sulfonate. Furthermore, a high specific capacitance of 199 F g −1 at current density of 0.5 A g −1 for PEDOT:MWCNT has also been demonstrated successfully for owning potential applications in supercapacitors.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Chun-Feng Xue,Xiao-Qing Li,Jian-Qiang Du,Li-Feng Wang,Xiao-Hong Li,Wen-Jun Yan,Xiao-Gang Hao
To enhance energy density of water-based electrochemical supercapacitor , a highly self-graphenized bicohar with huge pore volume is pyrolyzed from the biomass Ulva lactuca (UL) pre-boiled in Mg(CH 3 COO) 2 solution. During the pyrolysis process , the MgO converted from the Mg(CH 3 COO) 2 re-crystallized in the biomass UL inhibits the pore shrinkage and helps to inherit the pristine pore system . The resultant biochar HUB-2.0 exhibits high specific surface area (SSA) of 2296.7 m 2 g −1 and huge pore volume of 4.59 m 3 g −1 . It is also featured with moderate self-graphenization and heteroatoms self-doped surface in the connected pore system inherited from the precursor. It achieves a specific capacitance of 445.0 F g −1 at 0.5 A g −1 in the three-electrode system with the electrolyte 1.0 M H 2 SO 4 . A superior energy density of 27.17 Wh kg −1 is also calculated at a power density of 222.8 W kg −1 in the two-electrode system with the neutral electrolyte Na 2 SO 4 . The work provides a fast and efficient method to prepare the biochar with balanced properties to achieve superior electrochemical supercapacitor performance, especially for high energy density.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2018
·Vol. 6
·期 11
·2273-2281
·
IF 3.175
Peng Chen,Suhui Lu,Chao Yang,Zi He,Xuli Chen,Kunkun Guo
The molten salt activation containing different oxysalts are proposed to activate the ordered mesoporous carbons loading on graphene layers (OMC/G). The effects of different oxysalts activations on the structures of OMC/G are thoroughly investigated by scan electron microscopy (SEM), small angle X-ray scattering (SAXS), Raman spectroscopy and nitrogen adsorption-desorption at 77 K. The structures of these carboneous materials are related with the oxidizing nature of these oxysalts. By using weak oxysalt of K 2 CO 3 , the original structure of OMC/G is almost kept together with the appearance of a lot of micropores and mesopores. The electrochemical performances of OMC/G after different oxysalts activation are also studied for supercapacitor applications. OMC/G after weak oxysalt of K 2 CO 3 based electrode results in the highest specific capacitance up to 332.5 F g −1 at a current density of 1.0 A g −1 , which is higher than those after both KOH activation (276.8 F g −1 ) and the other three oxysalts activation. Moreover, OMC/G-K 2 CO 3 shows an excellent cycling stability with no capacitance loss over 5000 cycles. The molten salt activation would be potentially applied to activate the porous carbons for supercapacitor applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Hui Chen,Feng Yu,Gang Wang,Long Chen,Bin Dai,Shanglong Peng
N,S-Doped activated carbon was directly prepared via a facile and cost-efficient hydrothermal reaction, followed by alkali activation of elm flower (EL)-derived biomass. The EL-derived activated carbon (ELAC) had N and S contents of 2.21 and 6.06 atom %, respectively, in addition to a high Brunauer–Emmett–Teller (BET) surface area of 2048.6 m2 g–1 and moderate pore volume of 0.88 cm3 g–1. Owing to its high BET surface area and N/S functional groups, ELAC achieved a specific capacitance of 275 F g–1 at a current density of 1 A g–1 and retained a capacitance of 216 F g–1 at 20 A g–1. In addition, a symmetric supercapacitor based on N,S-self-doped ELAC electrode provided a capacitance of 62 F g–1 at a current density of 10 A g–1, with maximum energy and power densities of 16.8 Wh kg–1 and 600 W kg–1, respectively. The capacitance retention was also high, at 87.2%, at 4 A g–1 after 5000 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiashuo Hu,Chengwang Zhao,Yanxiao Si,Chen Hong,Yi Xing,Yijie Wang,Wei Ling,Weibo Feng,Lihui Feng
In light of the depletion of fossil resources, global warming, and other energy and environmental challenges, the utilization of biomass as an energy storage solution holds tremendous promise. In this research, Chitosan (CS)/CH 3 COOH/(CH 3 COO) 2 Zn hydrogels were produced through a cross-linking process that involves both ionic bonding and hydrogen bonding. Subsequently, CS carbon aerogels with extremely fine microporous structures were manufactured via freeze-drying, carbonization , and activation processes utilizing the Zn-Zn system. The dehydrating agent and activator used was ZnCl 2, whereas in situ doping of Zn 2+ in the carbon precursor functioned as an activation assistant. The activated CS carbon aerogel ACS-Zn20-700 prepared at 700 °C had a specific surface area of 857.47 m 2 /g, a microporous ratio of 89.44%, a pyridine-N content of 35.58%. The distribution of micropores and ultrafine pores facilitates effective connection and ion transport at the electrode–electrolyte interface, leading to an increase in the number of active sites in carbon materials and ultimately improving their specific capacitance. Nitrogen-containing groups also provided additional pseudocapacitance. In a three-electrode system, ACS-Zn20-700 obtained a specific capacitance of 380.8F/g at the current density of 0.5 A/g. The ACS-Zn20-700 supercapacitor in the two-electrode system had an energy density of 12.8 kW h −1 (at 125 W kg −1 ) and a capacitance retention rate of 85.27% (at 10,000 cycles). The findings of this work serve as a useful reference for the development of environmentally friendly biomass-derived carbon aerogel materials as potential candidates for supercapacitor electrode applications.
研究领域:
材料科学
·
能源存储
·
生物质利用
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuzhu Shi,Juanqin Xue,Yongqi Yu,Guangdong Wu,Changbin Tang
For the purpose of making high-value use of Chinese medicine waste, the preparation of derived biochar was studied and used as an electrode for supercapacitors (SCs). High-temperature KOH activation was used to convert the seed shells of discarded traditional Chinese medicine (Mubiezi) into graded porous carbon electrode materials, and the optimal electrode (MCSSAC-3) was obtained by optimizing the KOH addition ratio in this work. The MCSSAC-3 electrode obtained has a high specific surface area (1288.55 m2 g–1) and significantly higher specific capacitance of 302.29 F g–1 at 0.5 A g–1. The MCSSAC-3//MCSSAC-3 symmetric device has a high energy density of 11.13 Wh kg–1 at a power density of 350 W kg–1. In addition, even after 10,000 consecutive cycles, the MCSSAC-3//MCSSAC-3 symmetric device exhibits ideal capacitance retention of 87.16% at 10 A g–1. This work offers an approach for the preparation of low-cost and high-performance SCs carbon-based electrodes from discarded traditional Chinese medicine.
研究领域:
材料科学
·
环境科学
·
中医药学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 25
·16257-16266
·
IF 4.036
Xuan Xiao,Lei Song,Qianli Wang,Zhicheng Wang,Hongyan Wang,Juncai Chu,Jianmin Liu,Xinru Liu,Zhentao Bian,Xuanxuan Zhao
In this paper, hollow-tubular porous carbons were synthesized from abundant biomass Cycas fluff (CF) through simple carbonization followed by an NaHCO3 mild activation process. After activation, the tubular structure of the CF was retained, and a hierarchical structure of micropores, mesopores and macropores was formed. When the optimal mass ratio of NaHCO3/CF is 2, the obtained porous carbon CF-HPC-2 sample has a large specific surface area (SSA) of 516.70 m2 g−1 in Brunauer–Emmett–Teller (BET) tests and a total pore volume of 0.33 cm3 g−1. The C, O, N and S contents of CF-HPC-2 were tested as 91.77 at%, 4.09 at%, 3.54 at%, and 0.6 at%, respectively, by elemental analysis. Remarkably, CF-HPC-2 exhibits a high volume capacitance (349.1 F cm−3 at 1 A g−1) as well as a higher rate capability than other biomass carbon materials (289.1 F cm−3 at 10 A g−1). Additionally, the energy density of the CF-HPC-2 based symmetric supercapacitor in 2 M Na2SO4 electrolyte at 20 kW kg−1 is 27.72 W h kg−1. The particular hollow tubular morphology and activated porous structure determine the excellent electrochemical performance of the material. Hence, this synthetic method provides a new way of storing energy for porous carbon as high volumetric capacitance supercapacitor materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Materials
·
2023
·
IF 3.2
Liu Zheng,Liu Yuxin,Zheng Wenbin,Ding Yang,Liu Wenjun,Wen Yu,Guo Hongxuan,Hou Jixin
The cleanliness of transferred graphene is crucial for its application in various fields. The presence of residues of polymethyl methacrylate (PMMA) on the surface of transferred graphene has a negative impact on its transparency, transport, and other critical properties. In this study, we propose an alternative method to reduce such residues by using acetic acid instead of the commonly used acetone. The effects of treating graphene with acetic acid and acetone are comprehensively evaluated through optical microscopy, scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The results of this study demonstrate a significant reduction in surface residue when graphene is treated with acetic acid, compared to acetone treatment. Additionally, we applied this method to fabricate graphene-based supercapacitors and compared the results using acetic acid and acetone. This reduction in residue holds great promise for advancing the development of high-quality graphene devices.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
NANO
·
2018
·
IF 1.1
Jie Lian,Jiwei Li,Liang Wang,Ru Cheng,Xiuquan Tian,Xue Li,Jian Zhou,Tao Duan,Wenkun Zhu
Environmental and energy issues have always been a hot topic of global research. Oil leakage has caused great damage to the environment, affecting a wide area and it is difficult to clean up. In most cases, carbon-based adsorbents are typically utilized to remove oil spills because of their economic benefits and high adsorbent efficiency. At the same time, its excellent material properties can also be used for the preparation of supercapacitors. In this paper, the carbon aerogels were prepared by the one-step method. The prepared materials endowed a 3D network structure with a huge number of micropores and mesoporous, and the material is light-weight, stable, hydrophobic and has affinity for oil (17.02 g/g) to the KGM carbon aerogel. Through the physic-chemical characterization, the KGM carbon aerogel shows specific surface area is 689 m 2 /g, high water contact angle (136.64 ∘ ) and excellent reusability (more than 15 cycle times). In addition, we also discussed the electrochemical properties of the material and obtained the specific electrical capacity of 139 F/g under the condition of 1 A/g.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Batteries & Supercaps
·
2022
·Vol. 5
·期 12
·e202200305
·
IF 6.043
Yan Zhang,Yafei Wang,Yangming Zhang,Jingxin Zhao,Yiyang Liu,Ying Guan,Yongjun Zhang
Graphical Better electrolyte : A facile “water-salt-in-deep eutectic solvent” strategy is reported here to increase the ionic conductivity, while reducing the viscosity and freezing temperature for eutectic electrolytes. Compared to the initial DES, supercapacitors using “water-salt-in-deep eutectic solvent” electrolyte have higher specific capacitance, better rate performance, lower IR voltage drop, and lower internal resistance. A novel and simple “water-salt-in-deep eutectic solvent” (WS-DES) strategy is reported here to increase the ionic conductivity, while reducing the viscosity and freezing temperature of deep eutectic solvent (DES). Upon the addition of water and strong electrolyte salt to the DES of [LiTFSI][EG], the conductivity was increased by 16 times, the viscosity was decreased by 36 %, and the freezing temperature was decreased by 30 °C. Additionally, WS-DES strategy can be well applied to electrolytes for supercapacitor devices. Compared to the initial DES, supercapacitors using WS-DES electrolyte have higher specific capacitance, better rate performance, lower IR voltage drop, and lower internal resistance. Moreover, the WS-DES electrolyte also exhibits excellent electrochemical stability under extreme condition even at −40 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Huifang Lv,Haibo Rao,Zhiyu Zhou,Yang Zhao,Hualiang Wei,Zexiang Chen,Xiao Zhang,Yunlu Dai,Yanli Gong,Yan Wang
Improving the energy storage capabilities of aqueous alkaline supercapatteries relies heavily on the development of high-performance anode materials. Here, we presented a one-step composite molten salts method for the preparation of cobalt selenium hydroxide and Bi 2 O 2 Se heterostructure composites (CoSe(OH)/Bi 2 O 2 Se). The composite capitalizes on the advantageous interlayer properties of two-dimensional (2D) layered Bi 2 O 2 Se, connected via weak Van der Waals forces, alongside the high theoretical specific capacity of cobalt hydroxide derived from cobalt selenium hydroxide. This synergy facilitates efficient ion transport, thus exhibiting remarkable electrochemical characteristics. Specifically, CoSe(OH)/Bi 2 O 2 Se demonstrates a great specific capacity of 313.6 mAh/g at 1 A/g, significantly outperforming pure Bi 2 O 2 Se nanosheets. Moreover, CoSe(OH)/Bi 2 O 2 Se exhibits remarkable rate capability with 63.8% capacitance retention at sufficiently high current density (20 A/g), and excellent cycle performance that the capacitance remains is 70.3% after 1000 cycles of GCD testing. Additionally, ex-situ XRD analysis of CoSe(OH)/Bi 2 O 2 Se at different charge and discharge stages provides further insights into its energy storage mechanism. Furthermore, the NiAl-Cl LDH// CoSe(OH)/Bi 2 O 2 Se device demonstrates high power density and energy density. These results validate the feasibility of enhancing the electrochemical performance of 2D Bi 2 O 2 Se layered materials through the incorporation of active and cost-effective transition metal oxides/hydroxides, highlighting the tremendous potential of CoSe(OH)/Bi 2 O 2 Se as a negative electrode material for aqueous alkaline supercapattery.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Zeyi Wang,Yuzhen Qian,Guozhen Wang,Xinyu Sun,Jingcheng Hao
Supramolecular ionogels, as an emerging class of materials, utilize the intriguing properties of ionic liquids (ILs) and offer a promising method for constructing functional materials in anhydrous solvents. G-Quadruplex, assembled from guanine-rich nucleic acid building blocks, is an important structure closely associated with life and leads to the gelation for constructing versatile materials, such as the electrolytes of supercapacitors. Herein, we design and fabricate G-quadruplex ionogels using an unreported cation. Among the metal acetylacetonates under investigation, iron(III) acetylacetonate is distinctive in its capacity to stabilize G-quadruplexes through a reaction with the solvent ethylammonium nitrate (EAN), resulting in the formation of Fe(acac)2+. The ionogel displays high ionic conductivity (6.43 mS·cm–1), a wide electrochemical stability window (2.86 V), and self-healing properties. The supercapacitor based on the G-quadruplex ionogel electrolyte delivers a gravimetric capacitance of 91.8 F·g–1, a high energy density of 32.6 W h/kg, and a power density of 319.8 W/kg at a current density of 0.2A·g–1. Therefore, the present findings have important implications for deepening the understanding of G-quadruplex structures and metal acetylacetonate complexes and provide an approach to fabricating ionogel electrolytes for high-performance supercapacitors.
研究领域:
材料科学
·
生物化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）