Article
Chemistry, Multidisciplinary
Aiqin Xiang, Shuai Xie, Fei Pan, Hongchang Jin, Yiheng Zhai, Yanwu Zhu, Xianghua Kong, Hengxing Ji
Summary: In this study, a simple and environmental method for synthesizing CoAT-NC materials is proposed, which exhibit excellent capacitance performance and energy density. CoAT-NC shows good gravimetric capacitance and capacitance retention in acid electrolyte, as well as good energy density in organic electrolyte.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Analytical
Qian Cheng, Wei Chen, Hao Dai, Yi Liu, Xuebo Dong
Summary: The distribution of porosity in porous electrodes greatly influences the performance of electric double layer capacitors (EDLC). Compared to electrodes with fixed porosity, EDLCs with porous electrodes featuring stepwise or linear increasing porosity distributions exhibit higher specific capacitance, higher specific energy, and less voltage loss caused by non-uniform electrolyte distribution. The performance of EDLC is closely related to the location of electrolyte accumulation in the electrodes at high discharge current densities.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Shuyuan Zhu, Zhijun Wang, Xinglong Liu, Qiyi Cao, Yadong Wen, Ruozhao Cao, Zhiqing Wu, Cong Zhou, Ying Jin, Feng Tao
Summary: In this study, helical porous activated carbon fibers (HPACFs) were successfully synthesized using helical vessels extracted from tea as a bio-template. The HPACFs exhibited high specific surface area and developed pore structure, enabling efficient migration of electrolyte ions and electrons, leading to excellent electrochemical performance for energy storage.
Article
Electrochemistry
Sofia B. Davey, Amanda P. Cameron, Kenneth G. Latham, Scott W. Donne
Summary: This study used step potential electrochemical spectroscopy to characterize the dynamics of charge storage on a planar non-porous glassy carbon electrode in an aqueous electrolyte, revealing diffuse nature of electrolyte charge storage that extends a substantial distance even for concentrated electrolytes. This finding challenges the expected parallel planes of charge for double layer formation at the interface and has implications for the use of porous materials.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Inorganic & Nuclear
Yuyun Li, Dongyuan Lei, Shixun Yang, Jiqun Chen, Zirui Zhao, Junming Guo, Mingwu Xiang, Xiaofang Liu, Wei Bai
Summary: In this study, self-supporting porous carbon fibers were prepared and used as a carbon current collector in lithium-sulfur batteries. These fibers effectively addressed issues such as low electrical conductivity, severe polysulfide shuttle effect, and low sulfur utilization. The optimized sulfur cathode showed high coulombic efficiency and reversible capacity.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
K. Ramachandran, Gokila Subburam, Xian-Hu Liu, Ming-Gang Huang, Chun Xu, Dickon H. L. Ng, Ying-Xue Cui, Guo-Chun Li, Jing-Xia Qiu, Chuan Wang, Jia-Biao Lian
Summary: This study develops highly active nitrogen-doped porous carbon nanofoams for sodium-ion capacitors (SICs) and demonstrates excellent reversible capacity, rate capability, and cyclability. By constructing SICs devices with the developed carbon material as the anode and commercial superconductive carbon black as the cathode, high energy/power densities and remarkable cyclability are achieved. The methodology of the work is important for tuning the porous architectures and surface functional groups of carbon for high-performance SICs.
Article
Chemistry, Analytical
Deokhwan Kim, Xuanzhen Jin, Youngseul Cho, Jiho Lim, Bingyi Yan, Dongjin Ko, Dae Kyom Kim, Yuanzhe Piao
Summary: Nitrogen-doped porous carbon nanosheets show promising electrochemical performance in supercapacitors due to their interconnected porous structure. A facile method involving stepwise thermal annealing with melamine as the N-doping source was proposed to maintain the original structure of N-doped carbon nanosheets. The as-synthesized nanosheets exhibited high specific surface area and N-doping contents, leading to improved ion movement, adsorption, and electrolyte wettability, resulting in a maximum specific capacitance of 350F g-1 at 1 A g-1 and excellent long-term durability in a symmetric full-cell device.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
M. M. Sk, P. Pradhan, B. K. Patra, A. K. Guria
Summary: Electrical double-layer capacitors (EDLCs) could be an alternative solution to meet the increasing demand for power in electric cars and digital electronic devices. The high power density of EDLCs is achieved through the use of porous electrodes that provide a large accessible surface area for ions. Currently, porous carbon-based electrodes are widely used due to their high specific surface area, good electronic conductivity, and reasonable cost. The electrochemical properties of EDLCs are closely related to the chemical and physical properties of carbon materials, particularly activated carbon (AC) is an important electrode material in EDLC applications. The production of AC from inexpensive natural bio-precursors, such as crops and plants, has attracted research interest.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Boren Fang, Yifei Xu, Hidehisa Kawashima, Toshimitsu Hata, Masashi Kijima
Summary: The study synthesized porous carbons from microalgae under hydrothermal conditions, and found that efficient production of porous carbons was achieved when phthalaldehyde was added. The porous carbons from microalgae contained high nitrogen content, and could be transformed into carbon materials with excellent capacitor activity by heating.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Chemistry, Physical
Bing Yan, Wei Zhao, Qian Zhang, Qinying Kong, Guoqing Chen, Chunmei Zhang, Jingquan Han, Shaohua Jiang, Shuijian He
Summary: Biomass-derived carbon materials with hierarchical structures were synthesized using zinc nitrate-assisted method and used as thick electrodes for capacitive energy storage. The optimized carbon monolith showed a three-fold increase in specific capacitance and rate performance compared to the pristine carbon framework.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Dewei Yao, Hongmei Yu, Wei Song, Xueqiang Gao, Xinye Sun, Guang Jiang, Jinkai Hao, Zhigang Shao
Summary: Constructing membrane electrode assemblies (MEAs) with porous Pt-Ni nanobelt arrays can significantly enhance fuel cell performance by providing convenient mass transport pathways, where the strained catalyst improves catalytic activity. The superior performance of these MEAs is attributed to the high activity of the porous Pt-Ni nanobelt structure.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Jianfei Xiao, Yuan Wang, Tian C. Zhang, Shaojun Yuan
Summary: Nitrogen-sulfur codoped porous carbon (NSPC) shows great potential in greenhouse gas capture and energy storage. The NSPC-1-650 exhibits excellent CO2 adsorption capability, high specific capacitance, and good stability, making it a competitive candidate for use as a CO2 adsorbent and supercapacitor.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Jianyan Lin, Yuan Yuan, Min Wang, Xinlin Yang, Guangmin Yang
Summary: In recent years, supercapacitors have been widely used in various fields. Among them, electrical double-layer capacitors (EDLCs) have attracted attention due to their high power density. Theoretical studies on the physical and chemical properties of electrode materials have played an important role in improving the performance of EDLCs. This paper summarizes the recent progress in the theoretical study of quantum capacitance in 2D electrode materials and discusses the impact of different modification routes on the capacitance characteristics.
Article
Chemistry, Multidisciplinary
Yuhong Tian, Qiaoxia Ren, Xiaoyu Chen, Linbo Li, Xinzhe Lan
Summary: In this study, yeast was used as a carbon source and Na2SiO3 as an activator to prepare honeycomb porous carbon with high surface area. The method of direct mixing and grinding without any solvent is simple and suitable for large-scale production, and the porous carbon exhibited good specific capacity and rate capability.
Article
Chemistry, Multidisciplinary
Ezzoubair Bendadesse, Anatolii V. Morozov, Artem M. Abakumov, Hubert Perrot, Jean-Marie Tarascon, Ozlem Sel
Summary: In this study, an advanced ac-electrogravimetry method combined with classical electrochemical quartz crystal microbalance (EQCM) was used to investigate the effect of solvent/salt combinations on the structure of the electrical double layer (EDL) formed at the electrolyte/electrode interface (EEI) of LixMoO3. The results provided solid experimental evidence of the direct relationship between the solvation of ions and solvent polarity. This elegant and powerful method can be adopted to improve the engineering of interfaces in electrochemical energy storage devices.
