Article
Chemistry, Physical
Gaoxu Han, Jianbo Jia, Quanrun Liu, Guangxu Huang, Baolin Xing, Chuanxiang Zhang, Yijun Cao
Summary: A series of coal-based hierarchical porous carbons with adjustable pores were successfully prepared using Zinc chloride as a template during the carbonization process, leading to improved electrical conductivity and specific capacitance of the products.
Article
Energy & Fuels
Ritu Jangra, Poonam Mahendia, Manoj Karakoti, N. G. Sahoo, Anurag Srivastava, O. P. Sinha, Tristan D. Clemons, Uday Deshpande, Suman Mahendia
Summary: Hierarchical porous activated nitrogen-doped carbon was synthesized from pyrolysis of dried marigold flower precursor, and the effect of different impregnation zinc chloride (ZnCl2) ratios (1:1, 1:3 and 1:5) on the material properties was investigated. The activation process with ZnCl2 increased the porosity and surface area of the material, resulting in higher specific capacitance in fabricated symmetric cells. The addition of carbon black reduced the equivalent series resistance (ESR) and improved the energy density, allowing for the series combination of three cells to power a yellow LED for approximately 3 minutes.
JOURNAL OF ENERGY STORAGE
(2024)
Article
Energy & Fuels
Zhuo-ran Zhang, Shao-hua Luo, Jia-chen Wang, Meng-yao Sun, Sheng-xue Yan, Qing Wang, Ya-hui Zhang, Xin Liu, Xue-fei Lei
Summary: In this study, coal-based activated carbon (CBAC) was prepared from lignite and its synthesis process was optimized using response surface methodology. The optimal conditions resulted in a product with high specific surface area and large pore volume, and the CBAC-based supercapacitor exhibited high specific capacitance and excellent capacity retention at high current density.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Ganesh Dhakal, Deivasigamani Ranjith Kumar, Sumanta Sahoo, Jae-Jin Shim
Summary: Litchi seeds, a type of biowaste, can take more than two years to naturally decompose. Therefore, it is important to find a way to transform them into valuable materials. Activated carbon is a promising candidate for this purpose and has been successfully used to create high-performance supercapacitors. The study demonstrates the potential of utilizing litchi seeds as a sustainable resource for energy storage materials.
Article
Energy & Fuels
Ramadan Chalil Oglou, Yavuz Gokce, Emine Yagmur, T. Gamze Ulusoy Ghobadi, Zeki Aktas
Summary: This study explores the production of high value-added activated carbon from lignite for supercapacitor applications, and investigates the effect of ash content on supercapacitor performance. The results show that the ash content in activated carbon samples significantly reduces supercapacitor performance and increases resistances.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Biochemistry & Molecular Biology
Zhiwei Tian, Zhangzhao Weng, Junlei Xiao, Feng Wang, Chunmei Zhang, Shaohua Jiang
Summary: In this study, three-dimensional hierarchical porous carbon materials with high specific surface area and suitable nitrogen doping were prepared using a one-step carbonization strategy and common industrial materials. The assembled supercapacitor showed high energy density and long cycling ability, and the operating voltage window was easily expanded by using different electrolytes, resulting in even higher energy density and better cycle stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Egert Moller, Rasmus Palm, Kenneth Tuul, Meelis Harmas, Miriam Koppel, Jaan Aruvali, Marian Kulaviir, Enn Lust
Summary: This study synthesized highly ultramicroporous carbon materials by chemically activating peat with low concentrations of ZnCl2, resulting in high micropore ratios and efficient hydrogen adsorption under low-pressure conditions.
Article
Green & Sustainable Science & Technology
Jiahao Zhu, Xueqing Qiu, Shirong Sun, Tao Huang, Zongyi Huang, Lei Zhao, Xihong Zu, Wenli Zhang
Summary: A sustainable production process for the co-production of porous carbon and calcium chloride was proposed using renewable lignin as the carbon precursor. Homogeneous mixing of lignin precursors and CaO facilitated the creation of porous carbons, and high purity carbon dioxide and value-added CaCl2 were obtained through subsequent processes. The formation mechanism of the pore structure evolution of LPC was elucidated, and the obtained porous carbons showed excellent electrochemical performances. This combined sustainable production process has the potential to be developed as a practical method for producing calcium chloride and porous carbons.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Analytical
Fengfei Lin, Xiaohao Liu, Meina Ma, Fenglei Qi, Yang Pan, Lu Wang, Peiyong Ma, Ying Zhang
Summary: The study investigated the carbonization and activation mechanism of activated carbon prepared from Chinese parasol sawdust and ZnCl2 mixture. It was found that ZnCl2 played a crucial role in promoting the formation of pore structures in the activated carbon at different temperature stages, leading to the production of high surface area activated carbon without the need for additional activation time.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Physical
S. Veeresh, H. Ganesha, Y. S. Nagaraju, H. Vijeth, H. Devendrappa
Summary: In this study, novel nanocomposites of activated carbon/graphene oxide/tin oxide (AC/GO/SnO2) and activated carbon/graphene oxide/titanium-zinc acetate dehydrate (AC/GO/TiO2-Zn) were synthesized using hydrothermal method. The structural phase change, morphology, and microstructural arrangement in the nanocomposites were characterized using various techniques. Symmetry supercapacitor electrode devices were fabricated using the nanocomposites and their electrochemical properties were evaluated. The AC/GO/TiO2-Zn electrode demonstrated high specific capacity and cycle stability, indicating its suitability for supercapacitor applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
Energy & Fuels
Xiaoli Bai, Bingyan Quan, Chaoyan Kang, Xianglong Zhang, Yu Zheng, Jia Song, Ting Xia, Min Wang
Summary: Tea residue can be used to prepare activated carbon with excellent adsorption performance for wastewater treatment. ZnCl2-derived activated carbon shows the highest iodine number. The optimized activated carbon has a well-developed microporous structure and high specific surface area, providing promising potential for the removal of heavy metals, pigments, and pesticide residues.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Applied
Baihong Li, Chao Li, Dianqiang Li, Lijun Zhang, Shu Zhang, Zhenhua Cui, Dong Wang, Yonggui Tang, Xun Hu
Summary: This study investigates the evolution of functionalities and structure of activated carbon (AC) generated from pine needles activated with ZnCl2 at different temperatures. The results show that ZnCl2 can catalyze the dehydration, condensation, and aromatization reactions of sugary structures, leading to a significant increase in the yield of solid product (AC), and the resulting AC exhibits a high sensitivity to temperature. Furthermore, ZnCl2 can also catalyze the dehydration of hydroxyl group and the conversion of carbonyls in aldehydes/ketones. However, above 500 degrees C, the transformation of ZnCl2 to ZnO leads to the loss of catalytic activity.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Patin Tagsin, Pitphichaya Suksangrat, Pawinee Klangtakai, Pornjuk Srepusharawoot, Chesta Ruttanapun, Pisist Kumnorkaew, Samuk Pimanpang, Vittaya Amornkitbamrung
Summary: The study utilizes electrophoretic deposition to prepare AC-MnO2 films as supercapacitor electrodes, which exhibit high specific capacitance and cycling stability. Analysis by EDX and XPS reveals the changes in sodium content and manganese oxide valence states during discharge and charge processes. Computational simulation shows the atomic connections during sodium insertion into the α-MnO2 structure.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Applied
Zhi-Hui Yang, Jing-Pei Cao, Qi-Qi Zhuang, Yan Wu, Zhi Zhou, Yu-Lei Wei, Xiao-Yan Zhao
Summary: Lignite-based porous carbon with clustered pore structure, large specific surface area and high oxygen content was prepared through H3PO4 hydrothermal followed by KOH activation. The resulting POPC-2 exhibited a high specific capacitance and energy density, as well as outstanding cycling stability in supercapacitor applications.
FUEL PROCESSING TECHNOLOGY
(2023)
