Article
Electrochemistry
Shaoyun Chen, Yuanfang Zhang, Du Tian, Qingliang You, Min Zhong, Chenglong Hu, Jian Chen
Summary: The binder-free supercapacitors were fabricated by constructing flexible electrodes using polyaniline (PANI)@MnO2@flexible carbon nanofibers (CNFs) composite. The specific capaci-tance of single PANI@MnO2@CNFs electrode was 654 F/g at the scan rate of 10 mV/s in Na2SO4 electrolyte, with a capacitance retention of about 88.8% after 1000 cycles. The as-prepared symmetric super-capacitor exhibited a maximum energy density of 27.9 Wh/kg at the power density of 400 W/kg, surpassing or comparable to previous PANI-based supercapacitors.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Qasim Abbas, Lianghua Wen, Abdul Mateen, Najam Ul Hassan, Asim Idrees, Zia Ur Rehman, Majed A. Bajaber, Muhammad Sufyan Javed
Summary: This study synthesized hexagonal-phase manganese dioxide nanoparticles on conductive carbon cloth through a simple hydrothermal strategy. The resulting structure showed a large specific surface area and high porosity, making it an excellent candidate for positive electrode materials in high-performance supercapacitors. The electrode exhibited a high specific capacitance and excellent cycling stability.
Article
Chemistry, Physical
Yang Zhou, Xinying Cheng, Feng Huang, Zhao Sha, Zhaojun Han, Junyan Chen, Wenmu Yang, Yuyan Yu, Jin Zhang, Shuhua Peng, Shuying Wu, Andrew Rider, Liming Dai, Chun H. Wang
Summary: A new approach to create hierarchically structured electrodes for supercapacitors allows them to retain capacity under mechanical deformation, enabling the fabrication of high-performance moldable energy storage devices for wearable electronics and wireless electronic skins.
Article
Engineering, Environmental
Thitaree Pimklang, Anyarat Watthanaphanit, Pasit Pakawatpanurut
Summary: Graphene oxide-manganese dioxide (GO-MnO2) nanocomposites offer great potential for electrochemical applications. The solution plasma process (SPP) provides a simple and environmentally friendly method for synthesizing GO-MnO2 composites, allowing interaction between Mn ions and GO sheets, and enabling upscaling of the preparation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Composites
Zhao Sha, Feng Huang, Yang Zhou, Jin Zhang, Shuying Wu, Junyan Chen, Sonya A. Brown, Shuhua Peng, Zhaojun Han, Chun-Hui Wang
Summary: The study introduces a technique for increasing the capacitance of carbon fiber electrodes by hybridizing VG and MnO2, resulting in enhanced areal capacitance. The structural supercapacitor exhibits high energy density and mechanical properties, paving the way for the development of high-performance carbon fiber multifunctional composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Gu Liu, Jian Liu, Kejun Xu, Liuying Wang, Shanxin Xiong
Summary: A quick and convenient method was presented to prepare graphene paper as a flexible current collector, combined with MnO2 to obtain a flexible supercapacitor composite electrode without using binder or conductive agent. The electrochemical performance was significantly improved, showing high specific capacitance.
Article
Chemistry, Physical
Aijuan Xie, Haoye Wang, Zerui Zhu, Wanqi Zhang, Xiang Li, Qing Wang, Shiping Luo
Summary: The mesoporous CeO2-alpha-MnO2-rGO prepared by hydrothermal method showed excellent electrochemical performance, with high specific capacitance, energy density, and power density, as well as ultrahigh cycle stability, making it a suitable electrode material for supercapacitors.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Chenxu Miao, Yongzheng Fang, Kai Zhu, Chunliang Zhou, Ke Ye, Jun Yan, Dianxue Cao, Guiling Wang, Panpan Xu, Chunling Xie
Summary: A binder-free ultrathin alpha-MnSe nanosheets electrode was prepared and exhibited high capacity, good rate capability, and long-term durability. Moreover, an asymmetric supercapacitor fabricated by alpha-MnSe anode and active carbon cathode showed high energy density and satisfying cycle performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Yu Jun Yang, Ningya Wang, Songyang Chen, Chenjia Jiang, Panxiang Yang, Mengxiao Liu, Yao Cheng
Summary: Researchers have successfully synthesized a novel composite material, Ni/Mn-HCF/CC, on carbon cloth using a hydrothermal method and electrodeposition technique. This composite material exhibits a unique morphology and demonstrates excellent electrochemical performances, including high areal capacity, extraordinary rate performance, and excellent cycling stability. The fabricated asymmetric supercapacitor device shows a wide operational voltage window, high energy density, and capacity retention after cycling.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
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
Suwon Hwang, Taeseung Hwang, Heejung Kong, Sangwook Lee, Junyeob Yeo
Summary: This study introduces a novel fabrication method for hierarchical planar micro-supercapacitors using MnO2 nanowire (NW) arrays, aiming to improve space utilization and capacitance. By utilizing the laser-induced hydrothermal growth (LIHG) process, vertically aligned MnO2 NW arrays are grown stably for the fabrication of high-capacitance micro-supercapacitors.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Juan Huang, Kejia Wu, Hui Bai, Huabo Huang, Xiaoqing Zhang, Yanbo Liu, Chuanxi Xiong
Summary: The study constructed PANI/MnO2 composite material by adding manganese sulfate, which showed higher specific capacitance than bare PANI and demonstrated superior charge transfer behavior. In kinetic analysis, both capacitive and diffusion-controlled behaviors were found to contribute to the electrochemical performance.
Article
Materials Science, Ceramics
Hilal Pecenek, Sevda Yetiman, Fatma Kilic Dokan, M. Serdar Onses, Erkan Yilmaz, Ertugrul Sahmetlioglu
Summary: This study investigates the effect of carbon nanomaterials and MXene addition on MnO2 based supercapacitor electrodes, and finds that MXene based composite materials exhibit the highest specific capacitance and exceptional cycling efficiency. The favorable interaction between MnO2 and nanoscale materials enhances conductivity and surface area, leading to superior supercapacitor efficiency.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Baocheng Liu, Zongsheng Cao, Zhengchun Yang, Wen Qi, Jie He, Peng Pan, Huayi Li, Ping Zhang
Summary: In this study, graphene/MnO2 composites were prepared by growing MnO2 nanosheets on the surface of graphene using a water bath method, and the addition of black phosphorus was found to significantly improve the capacitive performance of the material. The fabricated micro-supercapacitor demonstrated high specific capacitance and was integrated with a flexible thin-film pressure sensor for practical applications.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2022)
Article
Energy & Fuels
Jiaming Wang, Ying Huang, Yan Gao, Jiayi Dai, Xu Sun
Summary: Carbon nanofibers (CNFs) have attracted considerable attention due to their ability to enhance the properties of materials. This paper proposes a method to enhance the electrochemical performance and flexibility of CNFs by using electrostatic self-assembly and a dipping and drying strategy. The resulting PAN@rGO@PPy electrode shows specific capacitance of 203 F g(-1) and high energy density of 15 Wh kg(-1) in a flexible supercapacitor. It also demonstrates remarkable cycling stability after 10,000 cycles. The research provides valuable insights for the development of flexible energy storage devices.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Inorganic & Nuclear
Mahsa Saberian, Alireza Nezamzadeh-Ejhieh
Summary: CuO was successfully supported on clinoptilolite nanoparticles (NCP) via ion exchange and calcination, forming CuO-NCP photocatalysts. CuO-NCP exhibited enhanced photocatalytic activity towards tetracycline (TC), and the best degradation performance was achieved under optimal conditions (25 ppm TC solution, pH 4.8, and 0.5 g/L catalyst).
SOLID STATE SCIENCES
(2024)
