scholarly journals SnO2 Quantum Dots Distributed along V2O5 Nanobelts for Utilization as a High-Capacity Storage Hybrid Material in Li-Ion Batteries

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7262
Author(s):  
I. Neelakanta Reddy ◽  
Bhargav Akkinepally ◽  
Venkatesu Manjunath ◽  
Gaddam Neelima ◽  
Mogalahalli V. Reddy ◽  
...  
Keyword(s):  
Discharge Capacity ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Electronic Conductivity ◽  
High Capacity ◽  
Reversible Capacity ◽  
Impedance Analysis ◽  
Li Ion Batteries ◽  
Synthesis Strategy ◽  
Li Ion

In this study, the facile synthesis of SnO2 quantum dot (QD)-garnished V2O5 nanobelts exhibiting significantly enhanced reversible capacity and outstanding cyclic stability for Li+ storage was achieved. Electrochemical impedance analysis revealed strong charge transfer kinetics related to that of V2O5 nanobelts. The SnO2 QD-garnished V2O5 nanobelts exhibited the highest discharge capacity of ca. 760 mAhg−1 at a density of 441 mAg−1 between the voltage ranges of 0.0 to 3.0 V, while the pristine V2O5 nanobelts samples recorded a discharge capacity of ca. 403 mAhg−1. The high capacity of QD-garnished nanobelts was achieved as an outcome of their huge surface area of 50.49 m2g−1 and improved electronic conductivity. Therefore, the as-presented SnO2 QD-garnished V2O5 nanobelts synthesis strategy could produce an ideal material for application in high-performance Li-ion batteries.

scholarly journals Novel core–shell structured Si/S-doped-carbon composite with buffering voids as high performance anode for Li-ion batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2407-2414 ◽  
Author(s):  
Dan Shao ◽  
Inna Smolianova ◽  
Daoping Tang ◽  
Lingzhi Zhang
Keyword(s):  
Hydrothermal Method ◽  
High Performance ◽  
Reversible Capacity ◽  
Carbon Composite ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Li Ion

Novel core–shell structured Si/S-doped carbon composite with buffering voids prepared by hydrothermal method and followed by carbonization and removal of template layer, exhibiting a reversible capacity of 664 mA h g−1 over 300 cycles.

scholarly journals Synthesis of Si/Fe2O3-Anchored rGO Frameworks as High-Performance Anodes for Li-Ion Batteries

2021 ◽  
Vol 22 (20) ◽  
pp. 11041
Author(s):  
Yajing Yan ◽  
Yanxu Chen ◽  
Yongyan Li ◽  
Xiaoyu Wu ◽  
Chao Jin ◽  
...  
Keyword(s):  
High Performance ◽  
Melt Spinning ◽  
Three Dimensional ◽  
High Capacity ◽  
Reversible Capacity ◽  
High Energy ◽  
High Specific Surface Area ◽  
High Energy Density ◽  
Active Components ◽  
Li Ion

By virtue of the high theoretical capacity of Si, Si-related materials have been developed as promising anode candidates for high-energy-density batteries. During repeated charge/discharge cycling, however, severe volumetric variation induces the pulverization and peeling of active components, causing rapid capacity decay and even development stagnation in high-capacity batteries. In this study, the Si/Fe2O3-anchored rGO framework was prepared by introducing ball milling into a melt spinning and dealloying process. As the Li-ion battery (LIB) anode, it presents a high reversible capacity of 1744.5 mAh g−1 at 200 mA g−1 after 200 cycles and 889.4 mAh g−1 at 5 A g−1 after 500 cycles. The outstanding electrochemical performance is due to the three-dimensional cross-linked porous framework with a high specific surface area, which is helpful to the transmission of ions and electrons. Moreover, with the cooperation of rGO, the volume expansion of Si is effectively alleviated, thus improving cycling stability. The work provides insights for the design and preparation of Si-based materials for high-performance LIB applications.

SnSb/TiO2/C nanocomposite fabricated by high energy ball milling for high-performance lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32462-32466 ◽  
Author(s):  
Haihua Zhao ◽  
Wen Qi ◽  
Xuan Li ◽  
Hong Zeng ◽  
Ying Wu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Ball Milling ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Li Ion Batteries ◽  
Energy Ball ◽  
Li Ion

Alloy anodes for Li-ion batteries (LIBs) have attracted great interest due to their high capacity.

scholarly journals Scalable Synthesis and Electrochemical Properties of Porous Si-CoSi2-C Composites as an Anode for Li-ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5397
Author(s):  
Hyungeun Seo ◽  
Hae-Ri Yang ◽  
Youngmo Yang ◽  
Kyungbae Kim ◽  
Sung Hyon Kim ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Capacity ◽  
High Energy ◽  
Attractive Alternative ◽  
Composite Electrodes ◽  
Li Ion Batteries ◽  
Porous Si ◽  
X Ray ◽  
Synthesis Strategy ◽  
Li Ion

Si-based anodes for Li-ion batteries (LIBs) are considered to be an attractive alternative to graphite due to their higher capacity, but they have low electrical conductivity and degrade mechanically during cycling. In the current study, we report on a mass-producible porous Si-CoSi2-C composite as a high-capacity anode material for LIBs. The composite was synthesized with two-step milling followed by a simple chemical etching process. The material conversion and porous structure were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and electron microscopy. The electrochemical test results demonstrated that the Si-CoSi2-C composite electrode exhibits greatly improved cycle and rate performance compared with conventional Si-C composite electrodes. These results can be ascribed to the role of CoSi2 and inside pores. The CoSi2 synthesized in situ during high-energy mechanical milling can be well attached to the Si; its conductive phase can increase electrical connection with the carbon matrix and the Cu current collectors; and it can accommodate Si volume changes during cycling. The proposed synthesis strategy can provide a facile and cost-effective method to produce Si-based materials for commercial LIB anodes.

Fabrication of Mesoporous Graphene@Ag@TiO2 Composite Nanofibers Via Electrospinning as Anode Materials for High-Performance Li-Ion Batteries

NANO ◽  
2021 ◽  
pp. 2150119
Author(s):  
M. M. Xia ◽  
J. Li ◽  
Y. Y. Zhang ◽  
D. N. Kang ◽  
Y. L. Zhang
Keyword(s):  
Anode Material ◽  
Discharge Capacity ◽  
Anode Materials ◽  
High Performance ◽  
Composite Nanofibers ◽  
Electrochemical Impedance ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
One Dimensional ◽  
Practical Applications

Nanosized TiO2 has been actively developed as a low-cost and environment-friendly anode material for lithium-ion batteries (LIBs), but its poor electronic conductivity seriously restricts its practical applications. This drawback is addressed in this work by the fabrication of one-dimensional mesoporous graphene@Ag@TiO2 composite nanofibers as anode materials for high-performance LIBs. The materials were prepared via electrospinning combined with annealing treatment, and the effects of graphene addition on the microstructure and electrochemical performance of the resulting mesoporous graphene@Ag@TiO2 nanofibers were investigated in detail. Ag@TiO2 nanofibers with the optimal amount of graphene displayed a maximum initial discharge capacity of [Formula: see text] at [Formula: see text] and retained a discharge capacity of [Formula: see text] at [Formula: see text] after 100 cycles. These results reflect the excellent cycling stability of the material. The average specific discharge capacity of the nanofibers ([Formula: see text] at [Formula: see text] was two-fold higher than that of samples without graphene, and their discharge capacity returned to [Formula: see text] (approximately [Formula: see text] for other nanofibers) when the current density was recovered to the initial value ([Formula: see text]. Electrochemical impedance spectroscopic measurements confirmed that the conductivity of the electrode was [Formula: see text], which is higher than that of bare mesoporous Ag@TiO2 ([Formula: see text]). Thus, one-dimensional mesoporous graphene@Ag@TiO2 nanofibers can be regarded as a promising anode material for LIBs.

Topological semimetal porous carbon as a high-performance anode for Li-ion batteries

2019 ◽  
Vol 7 (23) ◽  
pp. 14253-14259 ◽  
Author(s):  
Huanhuan Xie ◽  
Yu Qie ◽  
Muhammad Imran ◽  
Qiang Sun
Keyword(s):  
Lithium Ion Battery ◽  
Porous Carbon ◽  
High Performance ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
High Electronic Conductivity ◽  
Topological Semimetal ◽  
Li Ion ◽  
Battery Anode

Motivated by the advantages of inherent high electronic conductivity and ordered porosity of topological semimetal monoclinic C16 (m-C16), we explore its possible use as a lithium-ion battery anode material.

scholarly journals Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 827 ◽  
Author(s):  
Ying Liu ◽  
Xueying Li ◽  
Anupriya K. Haridas ◽  
Yuanzheng Sun ◽  
Jungwon Heo ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Anode Materials ◽  
Active Sites ◽  
High Performance ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Graphitic Carbon ◽  
Li Ion Batteries ◽  
Li Ion

Lithium ion (Li-ion) batteries have been widely applied to portable electronic devices and hybrid vehicles. In order to further enhance performance, the search for advanced anode materials to meet the growing demand for high-performance Li-ion batteries is significant. Fe3C as an anode material can contribute more capacity than its theoretical one due to the pseudocapacity on the interface. However, the traditional synthetic methods need harsh conditions, such as high temperature and hazardous and expensive chemical precursors. In this study, a graphitic carbon encapsulated Fe/Fe3C (denoted as Fe/Fe3C@GC) composite was synthesized as an anode active material for high-performance lithium ion batteries by a simple and cost-effective approach through co-pyrolysis of biomass and iron precursor. The graphitic carbon shell formed by the carbonization of sawdust can improve the electrical conductivity and accommodate volume expansion during discharging. The porous microstructure of the shell can also provide increased active sites for the redox reactions. The in-situ-formed Fe/Fe3C nanoparticles show pseudocapacitive behavior that increases the capacity. The composite exhibits a high reversible capacity and excellent rate performance. The composite delivered a high initial discharge capacity of 1027 mAh g−1 at 45 mA g−1 and maintained a reversible capacity of 302 mAh g−1 at 200 mA g−1 after 200 cycles. Even at the high current density of 5000 mA g−1, the Fe/Fe3C@GC cell also shows a stable cycling performance. Therefore, Fe/Fe3C@GC composite is considered as one of the potential anode materials for lithium ion batteries.

High capacity and superlong cycle life of Li3VO4/N–C hybrids as anode for high performance Li-ion batteries

2016 ◽  
Vol 301 ◽  
pp. 41-46 ◽  
Author(s):  
Jicheng Zhang ◽  
Shibing Ni ◽  
Jianjun Ma ◽  
Xuelin Yang ◽  
Lulu Zhang
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Cycle Life ◽  
Li Ion Batteries ◽  
Li Ion

Li-rich layer-structured cathode materials for high energy Li-ion batteries

2014 ◽  
Vol 07 (04) ◽  
pp. 1430002 ◽  
Author(s):  
Liu Li ◽  
Kim Seng Lee ◽  
Li Lu
Keyword(s):  
Cathode Materials ◽  
High Capacity ◽  
Rate Capability ◽  
Reversible Capacity ◽  
High Energy ◽  
Li Ion Batteries ◽  
Practical Applications ◽  
Depth Study ◽  
Li Ion ◽  
Charge Discharge

Li -rich layer-structured x Li 2 MnO 3 ⋅ (1 - x) LiMO 2 ( M = Mn , Ni , Co , etc.) materials have attracted much attention due to their extraordinarily high reversible capacity as the cathode material in Li -ion batteries. To better understand the nature of this type of materials, this paper reviews history of development of the Li -rich cathode materials, and provides in-depth study on complicated crystal structures and reaction mechanisms during electrochemical charge/discharge cycling. Despite the fabulous capability at low rate, several drawbacks still gap this type of high-capacity cathode materials from practical applications, for instance the large irreversible capacity loss at first cycle, poor rate capability, severe voltage decay and capacity fade during electrochemical charge/discharge cycling. This review will also address mechanisms for these inferior properties and propose various possible solutions to solve above issues for future utilization of these cathode materials in commercial Li -ion batteries.

Novel high-performance Ga2Te3 anode for Li-ion batteries

2021 ◽  
Author(s):  
Young-Han Lee ◽  
Yoon Hwa ◽  
Cheol-Min Park
Keyword(s):  
Lithium Ion Batteries ◽  
Electric Vehicles ◽  
High Power ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Increasing Demand

The development of high-capacity and high-power lithium-ion batteries (LIBs) is a key challenge to meet the increasing demand for advanced mobile electronics and electric vehicles. A novel high-capacity and high-power...

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