Synergistic effects of nanocarbon spheres sheathed on a binderless CoMoO4 electrode for high-performance asymmetric supercapacitor

2020 ◽  
Vol 49 (41) ◽  
pp. 14506-14519
Author(s):  
Roshan Mangal Bhattarai ◽  
Sudhakaran Moopri Singer Pandiyarajan ◽  
Shirjana Saud ◽  
Sang Jae Kim ◽  
Young Sun Mok
Keyword(s):  
High Performance ◽  
Synergistic Effects ◽  
Asymmetric Supercapacitor ◽  
Carbon Spheres ◽  
Ion Storage

A novel nanocomposite of CoMoO4 with carbon spheres was synthesized, having enhanced the ion storage capability, as an electrode for supercapacitors.

N-doped hierarchical porous hollow carbon spheres with multi-cavities for high performance Na-ion storage

2021 ◽  
Vol 506 ◽  
pp. 230170
Author(s):  
Lantao Liu ◽  
Xiangyu Sun ◽  
Yue Dong ◽  
Dengke Wang ◽  
Zheng Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Spheres ◽  
Hierarchical Porous ◽  
Ion Storage ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Porous hard carbon spheres derived from biomass for high-performance sodium/potassium-ion batteries

2021 ◽  
Vol 33 (5) ◽  
pp. 055401
Author(s):  
Shuijiao Chen ◽  
Kejian Tang ◽  
Fei Song ◽  
Zhichao Liu ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Metal Ion ◽  
High Performance ◽  
Potassium Ion ◽  
Waste Biomass ◽  
Carbon Microspheres ◽  
Carbon Spheres ◽  
Hard Carbon ◽  
Sodium Potassium ◽  
Ion Storage

Abstract Hard carbon is the most attractive anode material for electrochemical sodium/potassium-ion storage. The preparation of hard carbon spheres directly from the broad sources of biomass is of great interest but barely reported. Herein, we developed a simple two-step hydrothermal method to construct porous carbon microspheres directly from the original waste biomass of camellia shells. The porous carbon microspheres have high specific capacities of 250 mAh g−1 and 264.5 mAh g−1 at a current density of 100 mA g−1 for sodium-ion batteries and potassium-ion batteries, respectively. And it has excellent cycle stability for sodium ions and potassium ions outperforming most reported hard carbons, which is mainly attributed to the microporous structure and spherical morphology. The work paves a way to prepare porous hard carbon spheres directly from biomass for alkali metal-ion batteries.

Synergistic effects from graphene oxide nanosheets and TiO2 hierarchical structures enable robust and resilient electrodes for high-performance lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 4321-4328 ◽  
Author(s):  
Xing Li ◽  
Chunmei Zhang ◽  
Tao Meng
Keyword(s):  
Graphene Oxide ◽  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Hierarchical Structure ◽  
High Performance ◽  
Synergistic Effects ◽  
Hierarchical Structures ◽  
Lithium Ion ◽  
Graphene Oxide Nanosheets ◽  
Ion Storage

A strong synergistic effect from TiO2 hierarchical structure and GO is demonstrated for morphology control and enhanced lithium ion storage.

scholarly journals Facile Electrodeposition of Poly(3,4-ethylenedioxythiophene) on Poly(vinyl alcohol) Nanofibers as the Positive Electrode for High-Performance Asymmetric Supercapacitor

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3382 ◽  
Author(s):  
Nivekthiren Dasdevan ◽  
Muhammad Amirul Aizat Mohd Abdah ◽  
Yusran Sulaiman
Keyword(s):  
Vinyl Alcohol ◽  
High Performance ◽  
Synergistic Effects ◽  
Positive Electrode ◽  
Energy Output ◽  
Specific Power ◽  
Poly Vinyl Alcohol ◽  
Asymmetric Supercapacitor ◽  
Reduced Graphene ◽  
Output Efficiency

Poly(vinyl alcohol)/poly(3,4-ethylenedioxythiophene) (PVA/PEDOT) nanofibers were synthesized as a positive electrode for high-performance asymmetric supercapacitor (ASC). PVA/PEDOT nanofibers were prepared through electrospinning and electrodeposition meanwhile reduced graphene oxide (rGO) was obtained by electrochemical reduction. The PVA/PEDOT nanofibers demonstrated cauliflower-like morphology showing that PEDOT was uniformly coated on the smooth cross-linking structure of PVA nanofibers. In addition, the ASC showed a remarkable energy output efficiency by delivering specific energy of 21.45 Wh·kg−1 at a specific power of 335.50 W·kg−1 with good cyclability performance (83% capacitance retained) after 5000 CV cycles. The outstanding supercapacitive performance is contributed from the synergistic effects of both PVA/PEDOT//rGO, which gives promising materials for designing high-performance supercapacitor applications.

Morphology of High-Performance Rigid-Rod Polymer Fibers and Molecular Composites

1989 ◽  
Vol 47 ◽  
pp. 338-339
Author(s):  
W.W. Adams ◽  
S. J. Krause
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Liquid Crystalline ◽  
Molecular Level ◽  
Synergistic Effects ◽  
Tensile Modulus ◽  
Commercial Development ◽  
The Matrix ◽  
Molecular Composites ◽  
Rigid Rod

Rigid-rod polymers such as PBO, poly(paraphenylene benzobisoxazole), Figure 1a, are now in commercial development for use as high-performance fibers and for reinforcement at the molecular level in molecular composites. Spinning of liquid crystalline polyphosphoric acid solutions of PBO, followed by washing, drying, and tension heat treatment produces fibers which have the following properties: density of 1.59 g/cm3; tensile strength of 820 kpsi; tensile modulus of 52 Mpsi; compressive strength of 50 kpsi; they are electrically insulating; they do not absorb moisture; and they are insensitive to radiation, including ultraviolet. Since the chain modulus of PBO is estimated to be 730 GPa, the high stiffness also affords the opportunity to reinforce a flexible coil polymer at the molecular level, in analogy to a chopped fiber reinforced composite. The objectives of the molecular composite concept are to eliminate the thermal expansion coefficient mismatch between the fiber and the matrix, as occurs in conventional composites, to eliminate the interface between the fiber and the matrix, and, hopefully, to obtain synergistic effects from the exceptional stiffness of the rigid-rod molecule. These expectations have been confirmed in the case of blending rigid-rod PBZT, poly(paraphenylene benzobisthiazole), Figure 1b, with stiff-chain ABPBI, poly 2,5(6) benzimidazole, Fig. 1c A film with 30% PBZT/70% ABPBI had tensile strength 190 kpsi and tensile modulus of 13 Mpsi when solution spun from a 3% methane sulfonic acid solution into a film. The modulus, as predicted by rule of mixtures, for a film with this composition and with planar isotropic orientation, should be 16 Mpsi. The experimental value is 80% of the theoretical value indicating that the concept of a molecular composite is valid.

Preparation of TiNb6O17 nanospheres as high-performance anode candidates for lithium-ion storage

2019 ◽  
Vol 374 ◽  
pp. 937-946 ◽  
Author(s):  
Yu Yuan ◽  
Haoxiang Yu ◽  
Xing Cheng ◽  
Runtian Zheng ◽  
Tingting Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Lithium Ion ◽  
Ion Storage

Molecular Engineering on MoS2 Enables Large Interlayers and Unlocked Basal Planes for High‐Performance Aqueous Zn‐Ion Storage

2021 ◽  
Author(s):  
Shengwei Li ◽  
Yongchang Liu ◽  
Xudong Zhao ◽  
Kaixuan Cui ◽  
Qiuyu Shen ◽  
...  
Keyword(s):  
High Performance ◽  
Molecular Engineering ◽  
Ion Storage

An oxygen-deficient cobalt-manganese oxide nanowire doped with P designed for high performance asymmetric supercapacitor

2021 ◽  
Vol 379 ◽  
pp. 138178 ◽  
Author(s):  
Feifei Xiang ◽  
Xinyi Zhou ◽  
Xiaoqiu Yue ◽  
Qiang Hu ◽  
Qiaoji Zheng ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
High Performance ◽  
Asymmetric Supercapacitor
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