Article
Chemistry, Inorganic & Nuclear
Suleyman Kerli, Shiva Bhardwaj, Wang Lin, Ram K. Gupta
Summary: In this study, graphene oxide was synthesized using the Hummers method and reduced graphene oxide was obtained via the hydrothermal method. Silver-doped Reduced Graphene Oxide/Polyaniline (Ag-doped rGO/PANI) composites were then synthesized. Physical and electrochemical properties of the composites were analyzed, and the material containing approximately 17% silver-doped reduced graphene oxide exhibited the best performance in terms of stability and specific capacitance.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2023)
Article
Energy & Fuels
Marwa Ben Hadj Said, Khaled Charradi, Zakarya Ahmed, Hubert Cachet, Catherine Debiemme-Chouvy, Qana A. Alsulami, Sami Boufi, Sherif M. A. S. Keshk, Radhouane Chtourou
Summary: A ternary composite electrode consisting of graphene oxide, cellulose hydrogel, and polyaniline was synthesized and electrochemically characterized. It showed significantly enhanced cycling stability and improved capacitance, indicating a synergistic effect of cellulose hydrogel on PANi-GO.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Fangbo Yao, Wenruo Li, Shabrina Khainunni, Jiaojiao Ma, Choji Fukuhara, Chang Yi Kong
Summary: In this study, a simple and environmentally friendly hydrothermal method for synthesizing fragment-reduced graphene oxide (FrGO) without the use of reducing agents was reported. The FrGO was used as an electrode material for a supercapacitor. The results showed that the addition of certain additives improved the material's characteristics, leading to a higher specific capacitance and better stability. This research provides guidance for the development of electrode materials for various supercapacitor devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Xiao-Ming Yue, Zi-Jing Liu, Cui-Cui Xiao, Mei Ye, Zan-Peng Ge, Cheng Peng, Zi-Yi Gu, Jun-Sheng Zhu, Shuang-Quan Zhang
Summary: The study utilized a hydrothermal and calcination method to prepare Co3O4/rGO composite, which exhibited excellent performance in electrochemical supercapacitors. This was attributed to the synergy between rGO and Co3O4, as well as the unique three-dimensional structure obtained through changing the hydrothermal conditions.
Article
Chemistry, Analytical
Gabriel Zeplin, Eduardo G. C. Neiva
Summary: Different binary and ternary nanocomposites were synthesized among graphene oxide, manganese dioxide nanoparticles, and polyaniline using KMnO4 as an oxidizing agent and precursor for MnO2. The ratio of constituents depended on HCl concentration and aniline amount. The nanocomposites with higher MnO2 proportion showed the best performance as supercapacitors and electrochemical sensors, reaching capacitances of up to 150 F g(-1) and low detection limits for H2O2.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Chenxu Miao, Xianzhi Yin, Genglei Xia, Kai Zhu, Ke Ye, Qian Wang, Jun Yan, Dianxue Cao, Guiling Wang
Summary: The study shows that CoSe2/RGO composites exhibit excellent specific capacitance and durability, with the best performance achieved at 35.2 wt% RGO content. The hybrid supercapacitor using solid-state materials broadens the voltage window and enhances energy density.
APPLIED SURFACE SCIENCE
(2021)
Article
Environmental Studies
Muazzin Mupit, Mohd Asyadi Azam, Muhammad Remanul Islam, Rosli Yunus, Ong Siew Kooi, Mohd Al Fatihhi Mohd Szali Januddi
Summary: Polyaniline (PANi) reinforced with graphene oxide (GO) composites were synthesized and characterized. The composites showed promising performance as supercapacitor electrodes with high specific capacitance and capacitance retention after cycling. The maximum energy and power density were achieved at a loading of 10 wt.% GO, while the highest specific capacitance (C-s) was recorded at a loading of 50 wt.% GO.
ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Yi Sun, Yudan Yuan, Xianwei Geng, Chi Han, Shenkai Lu, Ivona Mitrovic, Li Yang, Pengfei Song, Cezhou Zhao
Summary: This study presents a simple hydrothermal reaction method to adjust the pore size of activated biomass materials for enhanced specific capacitance. The Ti3C2Tx and rGO nanosheets hydrogel demonstrates the best specific capacitance of 403 F g(-1) at 2 mV s(-1), which is approximately 1.5 times higher than pure activated pleumtus eryngii. Additionally, this work provides a technological strategy to reuse commercial activated biochar and has broad industrial applications.
Article
Materials Science, Composites
Yang Hu, Yang Zhan, Menghan Xu, Fukun Niu, Yu Chen, Quanling Yang, Chuanxi Xiong, Zhuqun Shi
Summary: In this study, cellulose-based flexible hydrogel supercapacitors were fabricated through a simple method at room temperature. These composite hydrogels exhibited high area specific capacitance and good flexibility, providing a new direction for the research of high-performance flexible solid-state supercapacitors.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Aparna Paul, Souvik Ghosh, Haradhan Kolya, Chun-Won Kang, Naresh Chandra Murmu, Tapas Kuila
Summary: In this study, Nickel-tin oxide/Nitrogen-doped reduced graphene oxide composite was successfully prepared and its morphology and electrochemical performance were controlled by varying the Ni:Sn ratio. The composite exhibited high specific capacitance and energy density, and showed good stability under cyclic and high power density conditions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Muhammad Shahid Khan, Imran Murtaza, Ahmed Shuja, Muhammad Adeel Asghar, Carlos Garcia Nunez, Rehan Abid, Ali Haider, Muhammad Faraz
Summary: A novel composite material was developed and used as an electrode for supercapacitors. The composite exhibited significantly improved electrochemical performance, indicating its potential for practical applications.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Yangjun Zhu, Zijie Huang, Xinyue Huang, Yipei Li, Huiqin Li, Binghua Zhou, Jian Liu, Keng Xu, Mingxi Wang, Hironori Ogata, Gan Jet Hong Melvin, Josue Ortiz-Medina, Wei Gong, Zubiao Wen, Mauricio Terrones, Morinobu Endo, Zhipeng Wang
Summary: Graphene quantum dots (GQDs)@MnO2 composite shows superior supercapacitor performance compared to pure MnO2 electrode, thanks to enhanced electrical conductivity, good wettability, and abundant contact sites. The composite is obtained through a highly efficient one-step hydrothermal method, resulting in MnO2 nanosheets anchored with GQDs. The GQDs@MnO2 electrode exhibits high specific capacitance of 246 F g-1 and the assembled asymmetric supercapacitor has a high energy density of 29.9 Wh kg-1 and good cycling performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Yu Jun Yang, Mengxiao Liu, Chenjia Jiang, Panxiang Yang, Ningya Wang, Songyang Chen, Yao Cheng
Summary: The Ni-HCF/rGO nanocomposite was successfully synthesized on Ni foam using a one-step hydrothermal method, with Ni foam serving as both the current collector and nickel source. The nanocube arrays exhibited high capacity, long cycle life, and good rate capability as a supercapacitor electrode in 2.0 M KOH aqueous solution. An asymmetrical supercapacitor device was assembled with Ni-HCF/rGO/Ni foam and activated carbon, showing promising potential for practical applications with a maximum energy density of 4.38 W h m(-2) at power density of 34 W m(-2).
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Wei Yan, Ying Zhang, Ting Zeng, Yuanyuan Zhang, Qijin Wan, Nianjun Yang
Summary: In this study, a hybrid material of nickel-manganese LDH/holey reduced graphene oxide (NiMn-LDH/hrGO) was synthesized using a one-step solvothermal technique. The addition of hrGO improved the conductivity and surface area of the NiMn-LDH/hrGO electrode. The material exhibited high specific capacity and excellent capacity retention in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Yanming Guo, Jin Chang, Liangqing Hu, Yinpeng Lu, Shipeng Yao, Xiaojiang Su, Xinyi Zhang, Hexin Zhang, Jing Feng
Summary: The utilization of polyaniline as a linker to anchor nickel sulfide (NiS2) on the surface of graphene oxide (GO) with a hollow bowl-like structure leads to a unique material (NiS2@15PG) with enhanced electrical conductivity and ion diffusion properties. This modification significantly improves the charge transfer resistance and Warburg impedance of NiS2. The resulting NiS2@15PG exhibits high specific capacitance and excellent multiplicativity, making it a promising material for practical applications in supercapacitors.