Article
Chemistry, Physical
Xunlong Zhang, Guilong Yan, Han Li, Zhenyu Li, Jingyu Chen, Li Wang, Yuanpeng Wu
Summary: Flexible electrode materials, such as carbon-based nanofiber, have gained significant attention for their flexibility, safety, and reliability. In this study, nitrogen-boron co-doped hollow porous carbon nanofiber (HPCNF) membranes were fabricated as flexible supercapacitor electrodes using a novel and simple method. The HPCNF exhibited a high specific surface area (413.98 m2/g) and the co-doping of N and B resulted in a high specific capacitance (200.2 F/g at 0.1 A/g). Even after 3000 cycles, the NB-HPCNF maintained a high capacitance retention (104.81%). This research provides a new approach for electrochemical energy storage, contributing to the development of portable flexible devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Green & Sustainable Science & Technology
Diab Khalafallah, Xinyao Quan, Chong Ouyang, Mingjia Zhi, Zhanglian Hong
Summary: Utilizing waste potato peel derived hierarchical porous carbon materials doped with sulfur and phosphorus can lead to the development of effective supercapacitor electrode materials with high specific capacitance and cycling stability. The co-doped porous activated carbon not only promotes capacitive performance but also possesses fascinating porous features beneficial for ion adsorption and contact area enlargement.
Article
Chemistry, Physical
Lulu Gao, Yi Wang, Yuqing Liu, Lan Xu
Summary: In this study, core-shell supercapacitor electrodes with high performance were prepared using electrospinning, carbonation, nitrogen-doping, and chemical polymerization. The optimized parameters for the morphologies, structures, and electrochemical performance of the products were obtained by characterizing the effects of pore-forming agent content, N-doped amount, and polymerization temperature. The core-shell composite exhibited a high specific capacitance of 342.13 F g-1 at 1 A g-1, with only 4.6% attenuation after 1000 cycles, indicating excellent charge storage performance and cycle stability. Furthermore, a symmetrical supercapacitor fabricated with the best electrode demonstrated an energy density of 3.10 Wh kg-1 at a power density of 50 W kg-1, highlighting the potential of this method for developing multifunctional electrode materials for supercapacitors.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Wang Yang, Peng Wang, Zhiqiang Tu, Liqiang Hou, Lu Yan, Bo Jiang, Chengxiao Zhang, Guoyong Huang, Fan Yang, Yongfeng Li
Summary: The study successfully synthesized heteroatoms-doped hierarchical porous carbon with a multi-scale pore structure, exhibiting superior electrochemical performance, which is significant for practical applications in supercapacitors.
Article
Polymer Science
Qianlan Ke, Yan Liu, Ruifang Xiang, Yuhui Zhang, Minzhi Du, Zhongxiu Li, Yi Wei, Kun Zhang
Summary: This study presents a novel strategy to fabricate nitrogen-doped porous core-sheath graphene fibers, aiming to enhance the utilization of graphene layers in fiber electrodes by introducing nitrogen doping and small-sized graphene sheets. The resulting nitrogen-doped core-sheath graphene-based fibers exhibit significantly improved electrochemical performance.
Article
Chemistry, Multidisciplinary
Rui Liu, Jing-Xuan Wang, Wein-Duo Yang
Summary: In this study, hierarchical porous activated carbon was prepared using coconut husk biomass waste as the carbon precursor, and its electrochemical properties were investigated. The carbonization process variables and the resulting powder properties were examined. The as-prepared activated carbon electrode exhibited pseudo-capacitive behavior and achieved a specific capacitance of 186 F g(-1) at 1 A g(-1). After 7000 cycles of charge-discharge testing, the initial capacitance retention rate was 95.6%. It is predicted that capacitor materials made from coconut shell will have better energy storage performance than traditional carbon supercapacitors.
Article
Engineering, Environmental
Jing Wang, Feng Zheng, Mingjun Li, Jiao Wang, Donghua Jia, Xiaodong Mao, Pengfei Hu, Qiang Zhen, Yi Yu
Summary: V2O5 nanobelt arrays covered with RuO2 nanosheets form a core-shell heterojunction with excellent specific capacitive value, cyclic steadiness, charge transferring resistance, and effective diffusion coefficient. Assembled into an electrochemical capacitor, it exhibits superior energy density.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Dong Liu, Tong Guo, Dekun Xu, Guangyu Xu, Zhoulei Wang, Baomin Fan, Yigang Ding
Summary: Favourable pore configuration and active heteroatoms contribute significantly to intrinsic electrochemical performance of carbon materials. N, S co-doped porous carbons are prepared through a two-step calcination process. The optimal sample CTK-3 exhibits considerable specific surface area, remarkable micropore configuration, and high heteroatom content, leading to remarkable specific capacitance, cyclic stability, rate capability, and ultrahigh energy density.
Article
Chemistry, Physical
Chao Sun, Zhiguang Guo, Man Zhou, Xiaoyan Li, Zaisheng Cai, Fengyan Ge
Summary: By converting cotton fabrics into high-performance carbon electrodes doped with heteroatoms and utilizing carbonization processes, this study achieved exceptional electrochemical properties for wearable supercapacitors. The resulting electrodes exhibited high specific capacitance, excellent rate property, and good coulombic efficiency, showcasing potential for mass production and future use in wearable electronic devices.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Burcu Ustun, Hamide Aydin, Serkan Naci Koc, Umran Kurtan
Summary: Amorphous cobalt oxide nanoparticles were successfully synthesized in heteroatom-doped carbon nanofibers using electrospinning and carbonization techniques. The heteroatom doping improved the capacitance and stability of the nanostructure, while the amorphous cobalt oxide enhanced ion diffusion and electronic conduction. The resulting composite nanofibers exhibited superior electrochemical performance, with a specific capacitance of 172 F/g, good rate capability, high cycle performance, and a specific energy of 5.97 Wh/kg.
Article
Chemistry, Inorganic & Nuclear
Xiaoqin Min, Zhitao Bo, ZhiKun Xu, Junhui Feng, Xiaoyun Lin, Yongnian Ni
Summary: A porous core-shell heterostructure of FeNi2-LDH@FeNi2S4 (FNLDH@FNS) was prepared on nickel foam via a two-step hydrothermal method. The electrode material exhibited excellent electrochemical performance, with high specific capacity values and long cycle life. An asymmetric supercapacitor assembled with FNLDH@FNS and activated carbon (AC) showed high energy density and power density.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Environmental
Fangqi Yang, Haoming Yu, Xinyu Mao, Qiangguo Meng, Shixia Chen, Qiang Deng, Zheling Zeng, Jun Wang, Shuguang Deng
Summary: A ternary heteroatoms (N, S, P)-doped carbon electrocatalyst was reported, which can enhance electrochemical activity by modulating electronic properties and providing abundant active sites and charge-carrier concentrations. The catalyst showed high Faradaic efficiency and stability in experiments, with promising potential for industrial application.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Guan Wu, Ziyang Ma, Xingjiang Wu, Xiaolin Zhu, Zengming Man, Wangyang Lu, Jianhong Xu
Summary: This study demonstrates high-performance fibre-based electrochemical supercapacitors (FESCs) constructed using hetero-structured polymetallic oxides/porous graphene core-sheath fibres. The FESCs exhibit high areal capacitance and manageable Faradaic reversibility. Furthermore, the solid-state FESCs based on these fibres show high energy-density, long-life cycles, diverse-powered capabilities, and actual energy-supply applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Applied
Kai Chen, Sen Weng, Jing Lu, Jianfeng Gu, Guoqi Chen, Oudong Hu, Xiancai Jiang, Linxi Hou
Summary: This study reported a facile approach to prepare nitrogen-doped carbon material with tunable pore structure, showing excellent electrochemical performance. By adjusting the calcination temperature and active agents, the morphology and pore structure of the material can be effectively controlled. The final product exhibited outstanding performance in terms of specific capacitance and cycle stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Hualiang Wei, Xiaowei Guo, Yan Wang, Zhiyu Zhou, Huifang Lv, Yang Zhao, Zengjie Gu, Zexiang Chen
Summary: Supercapacitors with hierarchical core-shell structure of Co3O4@NiO-1 demonstrate enhanced pseudocapacitance performance, high specific capacitance, and excellent cycling stability. By utilizing this material as positive electrode in an asymmetric supercapacitor, it achieves excellent specific capacitance and high energy density at different power densities, along with exceptional cyclic stability.
APPLIED SURFACE SCIENCE
(2022)