Article
Chemistry, Multidisciplinary
Meruyert Nazhipkyzy, Mukhtar Yeleuov, Shynggyskhan T. Sultakhan, Anar B. Maltay, Aizhan A. Zhaparova, Dana D. Assylkhanova, Renata R. Nemkayeva
Summary: Activated carbons are widely used in supercapacitors due to their processing advantages, conductivity, and porosity. This study found that activated carbon made from sawdust showed high specific capacitance in charge-discharge tests, even at high scan rates.
Article
Engineering, Environmental
Junjun Chen, Junxian Xie, Charles Q. Jia, Chenying Song, Jian Hu, Hailong Li
Summary: This article presents a facile and economical strategy for fabricating high-performance cellulose-based activated carbon fiber papers (ACFPs) that can be used as self-supporting supercapacitor electrodes without any binder. The resulting ACFPs exhibit excellent characteristics such as high specific surface area, conductivity, tensile strength, and flexible processability. The cellulose-derived activated carbon is primarily responsible for energy storage, while carbon fibers serve as a highly functional network. This work provides a novel strategy for manufacturing scalable, cost-effective paper-based electrode materials with broad application prospects in energy storage.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
C. Justin Raj, Ramu Manikandan, Murugesan Rajesh, Periyasamy Sivakumar, Hyun Jung, S. Jerome Das, Byung Chul Kim
Summary: In this study, a supercapacitor utilizing activated carbon from cornhusk and seawater as the electrolyte was designed, with the Ti-based electrode showing the best electrochemical performance and stability. The supercapacitor exhibited high specific capacitance, energy density, and stability in seawater electrolyte.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Analytical
Yao Sun, Jianjun Xue, Zhiwei Li, Bing Ding, Yufeng An, Shuai Zang, Hui Dou, Jiangmin Jiang, Xiaogang Zhang
Summary: A eco-friendly and facile approach has been applied to synthesize PCFs with tunable multi-level pores and satisfactory electrochemical performance in this study. Utilizing electrospinning technology, hard-template method, and carbonization process, nanofibers with interconnected multi-level pores were achieved for enhanced electrochemical performance. The engineered PCFs demonstrated high capacitance and excellent rate capability, along with symmetrical supercapacitors exhibiting good capacitance and high energy density with ionic liquid electrolyte.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Jisu Kim, Jin Gu Kang, Jaewon Choi, Paul V. Braun, Sung-Kon Kim
Summary: This study demonstrates the formation of fiber electrodes on a carbon fiber bundle with a surface mesostructured by single-walled carbon nanotubes via colloidal self-assembly. The three-dimensional structure of the fiber electrodes provides porosity and bicontinuous paths for charge transport, resulting in high energy and considerable rate retention capability. Additionally, the fiber microsupercapacitor composed of a twisted pair of fiber electrodes with a solid polymer electrolyte exhibits significant capacitance, rate retention capability, and cycle stability for at least 7000 charge-discharge cycles.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Jung Jae Lee, Su-Hyeong Chae, Jae Jun Lee, Min Sang Lee, Wonhyung Yoon, Lee Ku Kwac, Hong Gun Kim, Hye Kyoung Shin
Summary: This study analyzed the application of waste wood as a supercapacitor electrode material. Cellulose fibers were extracted from waste wood and mixed with graphene nanoplatelets (GnPs) to prepare carbon papers. The increase in GnPs content decreased the surface areas and specific capacitance of the carbon papers, but increased their capacitive performance.
Article
Materials Science, Multidisciplinary
Yupeng Feng, Zhisen Liu, Zhihui Lu, Wenyu Xie
Summary: In this study, sisal fiber carbon papers with high specific surface area were prepared using a simple method, and the effects of calcination temperature on their properties were systematically studied. The results indicated that sisal fiber carbon paper calcinated at 900 degrees Celsius exhibited better performance as supercapacitive electrodes.
Article
Energy & Fuels
Yu Song, Hong Wu, Biemin Sun, Min Liu, Wucui Ren, Yanqin Xu, Yuan Cao, Changguo Chen
Summary: Folded nanotubes were grown directly on Ni foam using a two-step hydrothermal method to form activated carbon (AC) and NiCo2S4 composite material with a unique nano-urchin structure. The morphology and structure could be controlled by the duration of the hydrothermal reaction. Characterization of the samples was done using XRD, XPS, EDS, and SEM. The electrochemical tests showed that the 12-hour hydrothermal composites (AC@NiCo2S4-2) had a complete folded nanotube structure, a large number of reactive sites, and better electrochemical properties compared to the 6-hour and 24-hour composites. The AC@NiCo2S4-2 also exhibited a high specific capacitance of 653.9 C g-1 at a current density of 1 A g-1, compared to the capacitance of NiCo2S4 (456.14 C g-1). Furthermore, the AC@NiCo2S4-2 showed improved electrochemical performance and cycle stability after combining with AC, with a capacitance retention rate of 62.84% at 10 A g-1 compared to 1 A g-1 and retaining 84.96% of the initial capacitance after 3000 cycles. Additionally, the hybrid supercapacitor (HSC) based on AC@NiCo2S4-2 and AC electrodes achieved a high energy density of 29.75 Wh kg-1 at a power density of 700 W kg-1 and maintained an energy density of 16.86 Wh kg-1 at a high power density of 7000 W kg-1.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Electrochemistry
Chieh-Tsung Lo, Keng-Wei Lin, Tzu-Pei Wang, Sheng-Min Huang, Chien-Liang Lee
Summary: The capacitive properties of nitrogen-doped electrospun carbon fibers are influenced by different surface modification methods. Hydrothermal treatment increases the nitrogen content on the fiber surface but decreases the specific surface area and pore volume, resulting in lower capacitance compared to nitrogen plasma treatment.
ELECTROCHIMICA ACTA
(2021)
Article
Environmental Sciences
Xi Zhang, Yuzuo Wang, Zhijun Qiao, Xuewen Yu, Dianbo Ruan
Summary: The study successfully recovered electrode powder from waste supercapacitors and regenerated activated carbon through chemical activation, restoring specific surface area and enhancing electrochemical performance for potential applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Physical
Aparna Deshpande, Shivam Rawat, Indrajit M. Patil, Sunit Rane, Thallada Bhaskar, Satishchandra B. Ogale, Srinivas Hotha
Summary: This study explores saccharide-derived carbons as sustainable anodes for supercapacitors. The acid-base synergistic pre-treatment/activation technique used enhances the surface area and charge storage capacity, thereby improving the performance of the capacitors. The results have important implications for understanding the electrochemical behavior of carbons.
Article
Chemistry, Physical
Xiangxia Jing, Lei Wang, Konggang Qu, Rui Li, Wenjun Kang, Haibo Li, Shenglin Xiong
Summary: Developing monolithic electrodes with high capacitor performance using chemically activated commercial melamine sponges and KOH is a challenge in the energy storage field. The study demonstrates that adjusting the KOH/melamine sponge mass ratio can regulate the graphitization degree, heteroatom content, and pore size distribution of the monolithic N-/O-doped carbon sponge electrodes. The optimized electrode shows promising specific capacitances and retention rates, and the charge storage mechanism in NOCSs is systematically studied to separate different capacitance contributions. Additionally, the NOCSs show good capacitance performances in all-solid-state supercapacitors, providing high energy density and power output for driving LED devices.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Raman Devi, Vinay Kumar, Sunil Kumar, Avnish Kumar Sisodiya, Ajay Kumar Mishra, Anushree Jatrana, Ashwani Kumar, Paul Singh
Summary: Green nanotechnology aims to address global sustainability issues by recycling industrial and bio-wastes to produce functional carbonaceous nanomaterials. In this study, activated carbon (AC) was synthesized from walnut shell through a hydrothermal decomposition approach. The synthesized AC exhibited a high specific surface area of 408.8 m2/g and excellent specific capacitance of 204F/g at 1 A/g current density, with good cyclability up to 10,000 cycles.
Article
Electrochemistry
Preeyanuch Supchocksoonthorn, Nathakorn Hrimchum, Thanyarak Budsrirak, Sunyalux Intaraprasit, Nichaphat Thongsai, Darunee Aussawasathien
Summary: A novel carbon fiber mat was developed by combining tobacco leaf-based carbon dots with rubber wood chip-extracted lignin/polyacrylonitrile composite fibers. The performance of the carbon fiber was found to be influenced by the carbon dots content and carbonization temperature. The carbon fiber mat containing 0.4% volume concentration of tobacco leaf-based carbon dots and carbonized at 1200℃ exhibited optimal specific capacitance (225 F g-1), energy density (53 W h kg-1), and power density (130 W kg-1) at a current density of 0.2 A g-1 in 6 M KOH electrolyte, with cycling stability of 90% after 12,000 cycles at a current density of 5 A g-1.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Alexey Yu. Rychagov, Valentin E. Sosenkin, Marianna Yu. Izmailova, Evgeny N. Kabachkov, Yury M. Shulga, Yury M. Volfkovich, Gennady L. Gutsev
Summary: This study investigated the self-discharge behavior of an electric double-layer capacitor with composite activated carbon electrodes and aqueous electrolyte. It was found that under long-term potentiostatic charge, the discharge capacity decreased when the voltage exceeded 0.8V. The self-discharge process consisted of initial and main phases, and the optimal stabilization time was determined to be 50 minutes at 1.4V.
Article
Electrochemistry
Gelines Moreno-Fernandez, Christoph Schuetter, Jose M. Rojo, Stefano Passerini, Andrea Balducci, Teresa A. Centeno
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2018)
Article
Electrochemistry
Gelines Moreno-Fernandez, Mirko Kunowsky, Maria Angeles Lillo-Rodenas, Joaquin Ibanez, Jose M. Rojo
Article
Electrochemistry
G. Moreno-Fernandez, S. Perez-Ferreras, L. Pascual, I. Llorente, J. Ibanez, J. M. Rojo
ELECTROCHIMICA ACTA
(2018)
Article
Electrochemistry
Juan A. Arguello, Jose M. Rojo, Rodrigo Moreno
ELECTROCHIMICA ACTA
(2019)
Editorial Material
Electrochemistry
G. Moreno-Fernandez, S. Perez-Ferreras, L. Pascual, I. Llorente, J. Ibanez, J. M. Rojo
ELECTROCHIMICA ACTA
(2019)
Article
Energy & Fuels
I Aldama, K. Siwek, J. M. Amarilla, J. M. Rojo, S. Eugenio, T. M. Siva, M. F. Montemor
JOURNAL OF ENERGY STORAGE
(2019)
Article
Chemistry, Applied
Aroldo J. Romero-Anaya, Mirko Kunowsky, Monica Rufete-Beneite, Maria Angeles Lillo-Rodenas, Angel Linares-Solano
MICROPOROUS AND MESOPOROUS MATERIALS
(2019)
Article
Chemistry, Physical
Juan Luis Gomez-Urbano, Gelines Moreno-Fernandez, Maria Arnaiz, Jon Ajuria, Teofilo Rojo, Daniel Carriazo
Article
Electrochemistry
I Aldama, M. A. Lillo-Rodenas, M. Kunowsky, J. Ibanez, J. M. Rojo
ELECTROCHIMICA ACTA
(2020)
Article
Chemistry, Physical
Gelines Moreno-Fernandez, Juan L. Gomez-Urbano, Marina Enterria, Teofilo Rojo, Daniel Carriazo
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Article
Electrochemistry
I. Aldama, V. Barranco, J. Ibanez, J. M. Amarilla, J. M. Rojo
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)