Layer-by-layer assembly modification to prepare firmly bonded Si–graphene composites for high-performance anodes

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 4835-4842 ◽  
Author(s):  
Wenhui Zhang ◽  
Lin Wu ◽  
Lijuan Du ◽  
Lu Yue ◽  
Rongfeng Guan ◽  
...  
Keyword(s):  
High Performance ◽  
Retention Rate ◽  
High Capacity ◽  
Rate Capability ◽  
Cycling Performance ◽  
Thermal Reduction ◽  
Layer By Layer ◽  
Capacity Retention ◽  
Graphene Composite ◽  
New Si

A new Si–graphene composite was fabricated by a facile LBL technique followed by thermal reduction, which exhibited excellent cycling performance and rate capability as an anode, showing a high capacity retention rate of 92.0% over 100 cycles.

scholarly journals Hard Carbon Derived from Avocado Peels as a High-Capacity, High-Performance Anode Material for Sodium-Ion Batteries

2021 ◽  
Author(s):  
Francielli Genier ◽  
Shreyas Pathreeker ◽  
Robson Schuarca ◽  
Mohammad Islam ◽  
Ian Hosein
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Hard Carbon ◽  
Storage Technologies ◽  
Carbon Based

Deriving battery grade materials from natural sources is a key element to establishing sustainable energy storage technologies. In this work, we present the use of avocado peels as a sustainable source for conversion into hard carbon based anodes for sodium ion batteries. The avocado peels are simply washed and dried then proceeded to a high temperature conversion step. Materials characterization reveals conversion of the avocado peels in high purity, highly porous hard carbon powders. When prepared as anode materials they show to the capability to reversibly store and release sodium ions. The hard carbon-based electrodes exhibit excellent cycling performance, namely, a reversible capacity of 352.55 mAh/g at 0.05 A/g, rate capability up to 86 mAh/g at 3500 mA/g, capacity retention of >90%, and 99.9% coulombic efficiencies after 500 cycles. This study demonstrates avocado derived hard carbon as a sustainable source that can provide excellent electrochemical and battery performance as anodes in sodium ion batteries.

scholarly journals Hierarchical porous MnO/graphene composite aerogel as high-performance anode material for lithium ion batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 15857-15863 ◽  
Author(s):  
Zhiying Ma ◽  
Hailiang Cao ◽  
Xufeng Zhou ◽  
Wei Deng ◽  
Zhaoping Liu
Keyword(s):  
Anode Material ◽  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Aerogel ◽  
Graphene Composite ◽  
Hierarchical Pore Structure ◽  
Hierarchical Porous ◽  
Hierarchical Pore

MnO/graphene composite anode material with hierarchical pore structure shows high capacity, excellent rate capability and stability.

FLUX SYNTHESIS OF Na0.44MnO2 NANORIBBONS AND THEIR ELECTROCHEMICAL PROPERTIES FOR Na-ION BATTERIES

2013 ◽  
Vol 06 (02) ◽  
pp. 1350012 ◽  
Author(s):  
LIWEI ZHAO ◽  
JIANGFENG NI ◽  
HAIBO WANG ◽  
LIJUN GAO
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Impedance Spectroscopy ◽  
Electrochemical Properties ◽  
Electrochemical Impedance ◽  
High Capacity ◽  
Rate Capability ◽  
Cycling Performance ◽  
Capacity Retention ◽  
Flux Synthesis ◽  
Promising Electrode Material

Well-crystallized Na0.44MnO2 is readily synthesized via a facile NaCl -flux reaction at 850°C for 5 h. The Na0.44MnO2 material exhibits a well-defined nanoribbon structure with dimension of 50–100 nm in thickness and 200–500 nm in width. Electrochemical properties of as-prepared Na0.44MnO2 are thoroughly investigated on assembled nonaqueous Na0.44MnO2 // Na cells using cyclic voltammetry, galvanostatic test, and electrochemical impedance spectroscopy. The results show that the Na0.44MnO2 nanoribbon material can deliver a high capacity of 106 mAh g-1 with stable cycling performance over 40 cycles. In addition, it exhibits a favorable rate capability, delivering a capacity of 90 mAh g-1 at a rate of 1 C. The high capacity retention combined with acceptable rate capability makes the Na0.44MnO2 a promising electrode material for advanced Na -ion batteries.

Super-aligned carbon nanotube/graphene hybrid materials as a framework for sulfur cathodes in high performance lithium sulfur batteries

2015 ◽  
Vol 3 (10) ◽  
pp. 5305-5312 ◽  
Author(s):  
Li Sun ◽  
Weibang Kong ◽  
Ying Jiang ◽  
Hengcai Wu ◽  
Kaili Jiang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Composite Electrode ◽  
High Capacity ◽  
Rate Capability ◽  
Graphene Composite ◽  
Lithium Sulfur Batteries ◽  
Binder Free ◽  
Sulfur Cathodes ◽  
Lithium Sulfur

A binder-free sulfur–carbon nanotube/graphene composite electrode is fabricated by a scalable ultrasonication-assisted method, demonstrating high capacity, reversibility, and rate capability.

scholarly journals Facile fabrication of hierarchical porous carbon for a high-performance electrochemical capacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46329-46335 ◽  
Author(s):  
Guixiang Du ◽  
Qiuxiao Bian ◽  
Jingbo Zhang ◽  
Xinhui Yang
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
Electrochemical Capacitor ◽  
High Specific Capacitance ◽  
Cycling Performance ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Facile Fabrication ◽  
Rapid Pyrolysis

A facile and rapid pyrolysis method is developed for the synthesis of 3D hierarchical porous carbon, which exhibits a high specific capacitance, good rate capability and good cycling performance.

Hierarchical coral-like MnCo2O4.5@Co-Ni LDH composites on Ni foam as promising electrodes for high-performance supercapacitor

2021 ◽  
Author(s):  
yajun JI ◽  
Fei Chen ◽  
Shufen Tan ◽  
Fuyong Ren
Keyword(s):  
Electrochemical Performance ◽  
Metal Oxides ◽  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Negative Electrode ◽  
High Energy ◽  
Hybrid Nanostructures ◽  
High Energy Density ◽  
Ni Foam

Abstract Transition metal oxides are generally designed as hybrid nanostructures with high performance for supercapacitors by enjoying the advantages of various electroactive materials. In this paper, a convenient and efficient route had been proposed to prepare hierarchical coral-like MnCo2O4.5@Co-Ni LDH composites on Ni foam, in which MnCo2O4.5 nanowires were enlaced with ultrathin Co-Ni layered double hydroxides nanosheets to achieve high capacity electrodes for supercapacitors. Due to the synergistic effect of shell Co-Ni LDH and core MnCo2O4.5, the outstanding electrochemical performance in three-electrode configuration was triggered (high area capacitance of 5.08 F/cm2 at 3 mA/cm2 and excellent rate capability of maintaining 61.69 % at 20 mA/cm2), which is superior to those of MnCo2O4.5, Co-Ni LDH and other metal oxides based composites reported. Meanwhile, the as-prepared hierarchical MnCo2O4.5@Co-Ni LDH electrode delivered improved electrical conductivity than that of pristine MnCo2O4.5. Furthermore, the as-constructed asymmetric supercapacitor using MnCo2O4.5@Co-Ni LDH as positive and activated carbon as negative electrode presented a rather high energy density of 220 μWh/cm2 at 2400 μW/cm2 and extraordinary cycling durability with the 100.0 % capacitance retention over 8000 cycles at 20 mA/cm2, demonstrating the best electrochemical performance compared to other asymmetric supercapacitors using metal oxides based composites as positive electrode material. It can be expected that the obtained MnCo2O4.5@Co-Ni LDH could be used as the high performance and cost-effective electrode in supercapacitors.

Building sponge-like robust architectures of CNT–graphene–Si composites with enhanced rate and cycling performance for lithium-ion batteries

2015 ◽  
Vol 3 (7) ◽  
pp. 3962-3967 ◽  
Author(s):  
Xiaolei Wang ◽  
Ge Li ◽  
Fathy M. Hassan ◽  
Matthew Li ◽  
Kun Feng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Cycling Stability ◽  
Great Promise ◽  
Practical Applications ◽  
Excellent Cycling Stability

High-performance robust CNT–graphene–Si composites are designed as anode materials with enhanced rate capability and excellent cycling stability for lithium-ion batteries. Such an improvement is mainly attributed to the robust sponge-like architecture, which holds great promise in future practical applications.

Synthesis and Electrochemical Performance of SnO2/Graphene Hybrid Anode for Lithium Ion Batteries

2013 ◽  
Vol 1540 ◽  
Author(s):  
Chia-Yi Lin ◽  
Chien-Te Hsieh ◽  
Ruey-Shin Juang
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Homogeneous Distribution

ABSTRACTAn efficient microwave-assisted polyol (MP) approach is report to prepare SnO2/graphene hybrid as an anode material for lithium ion batteries. The key factor to this MP method is to start with uniform graphene oxide (GO) suspension, in which a large amount of surface oxygenate groups ensures homogeneous distribution of the SnO2 nanoparticles onto the GO sheets under the microwave irradiation. The period for the microwave heating only takes 10 min. The obtained SnO2/graphene hybrid anode possesses a reversible capacity of 967 mAh g-1 at 0.1 C and a high Coulombic efficiency of 80.5% at the first cycle. The cycling performance and the rate capability of the hybrid anode are enhanced in comparison with that of the bare graphene anode. This improvement of electrochemical performance can be attributed to the formation of a 3-dimensional framework. Accordingly, this study provides an economical MP route for the fabrication of SnO2/graphene hybrid as an anode material for high-performance Li-ion batteries.

Co3Sn2/SnO2 nanocomposite loaded on Cu foam as high-performance three-dimensional anode for lithium-ion batteries

2019 ◽  
Vol 43 (3) ◽  
pp. 1238-1246 ◽  
Author(s):  
Duo Zhang ◽  
Chaoqi Bi ◽  
Qingliu Wu ◽  
Guangya Hou ◽  
Guoqu Zheng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Tin Dioxide ◽  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Cu Foam ◽  
Low Rate

It is a challenge to commercialize tin dioxide-based anodes for lithium-ion batteries due to their low rate capability and poor cycling performance of the electrodes.

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