Nickel Foam-Supported NiO/Ag Porous Spheres Prepared by Electrodeposition as Anode for Lithium-Ion Batteries

2008 ◽  
Vol 47-50 ◽  
pp. 621-624 ◽  
Author(s):  
X.H. Huang ◽  
J.P. Tu ◽  
X.H. Xia ◽  
X.L. Wang
Keyword(s):  
Lithium Ion Batteries ◽  
Electrical Conduction ◽  
Ag Nanoparticles ◽  
Coulombic Efficiency ◽  
Nickel Foam ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Electrodeposition Technique ◽  
Sem Images ◽  
Porous Spheres

Nickel foam-supported NiO spheres were prepared by an electrodeposition technique using nickel foam as the substrate, and then the Ag nanoparticles were loaded on the NiO spheres. SEM images showed that these NiO/Ag spheres are porous with a size of about 2 µm. As an anode for lithium-ion batteries, the nickel foam-supported NiO/Ag spheres exhibit higher coulombic efficiency, weaker polarization, and better cycling performance as compared to the NiO spheres. The improvements of these electrochemical properties are attributed to the Ag nanoparticles, which enhanced the electrical conduction of the electrode.

scholarly journals Dealloying-Derived Nanoporous Cu6Sn5 Alloy as Stable Anode Materials for Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4348
Author(s):  
Chi Zhang ◽  
Zheng Wang ◽  
Yu Cui ◽  
Xuyao Niu ◽  
Mei Chen ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Specific Area ◽  
Cycling Performance ◽  
Ex Situ ◽  
Li Ion ◽  
Xrd Patterns ◽  
Cu6sn5 Alloy

The volume expansion during Li ion insertion/extraction remains an obstacle for the application of Sn-based anode in lithium ion-batteries. Herein, the nanoporous (np) Cu6Sn5 alloy and Cu6Sn5/Sn composite were applied as a lithium-ion battery anode. The as-dealloyed np-Cu6Sn5 has an ultrafine ligament size of 40 nm and a high BET-specific area of 15.9 m2 g−1. The anode shows an initial discharge capacity as high as 1200 mA h g−1, and it remains a capacity of higher than 600 mA h g−1 for the initial five cycles at 0.1 A g−1. After 100 cycles, the anode maintains a stable capacity higher than 200 mA h g−1 for at least 350 cycles, with outstanding Coulombic efficiency. The ex situ XRD patterns reveal the reverse phase transformation between Cu6Sn5 and Li2CuSn. The Cu6Sn5/Sn composite presents a similar cycling performance with a slightly inferior rate performance compared to np-Cu6Sn5. The study demonstrates that dealloyed nanoporous Cu6Sn5 alloy could be a promising candidate for lithium-ion batteries.

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.

Effect of Fluorine-Containing Additive on the Electrochemical Properties of Silicon Anode for Lithium-Ion Batteries

2019 ◽  
Vol 944 ◽  
pp. 699-704 ◽  
Author(s):  
Jing Wang ◽  
Xiao Hang Yang ◽  
Yue Feng Su ◽  
Shi Chen ◽  
Feng Wu
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Solid Electrolyte Interphase ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Silicon Anode ◽  
Cycle Stability ◽  
Promising Candidate ◽  
Sem Images ◽  
The Stability

Silicon anode is a promising candidate as an alternative to the conventional graphitic anode in lithium-ion batteries. In this work, silicon anode is modified by NH4F using a facile method in air. The concentration of NH4F on the electrochemical performance is systematically checked. The 5wt%NH4F-modified silicon anode exhibits enhanced cycle and rate performances, the first discharge specific capacity is 3958 mAh·g-1 with 86.45% as the coulombic efficiency at 0.4A·g-1. The capacity can maintain at 703.3 mAh·g-1 after 50 cycles, exhibiting a much better cycle stability than pristine silicon anode (329.9 mAh·g-1 after 50 cycles). SEM images confirm that NH4F can alleviate the volume expansion of silicon since LiF can be generated at the surface which is beneficial to the stability of solid-electrolyte interphase (SEI).

scholarly journals NbO2 as a Noble Zero-Strain Material for Li-Ion Batteries: Electrochemical Redox Behavior in a Nonaqueous Solution

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2960 ◽  
Author(s):  
Yang-Soo Kim ◽  
Yonghoon Cho ◽  
Paul M. Nogales ◽  
Soon-Ki Jeong
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Active Material ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Nonaqueous Solution ◽  
Constant Current ◽  
Lithium Ions ◽  
Rutile Structure

Lithium-ion batteries are widely available commercially and attempts to extend the lifetime of these batteries remain necessary. The energy storage characteristics of NbO2 with a rutile structure as a material for the negative electrode of lithium-ion batteries were investigated. When negative potential was applied to the NbO2 electrode during application of a constant current in a nonaqueous solution containing lithium ions, these ions were inserted into the NbO2. Conversely, upon application of positive potential, the inserted lithium ions were extracted from the NbO2. In situ X-ray diffraction results revealed that the variation in the volume of NbO2 accompanying the insertion and extraction of lithium was 0.14%, suggesting that NbO2 is a zero-strain (usually defined by a volume change ratio of 1% or less) active material for lithium-ion batteries. Moreover, the highly stable structure of NbO2 allows the corresponding electrode to exhibit excellent cycling performance and coulombic efficiency.

Synthesis, Characterization, and Electrochemical Analysis of the Cobalt Free Composite Cathode Material 0.5Li2MnO3-0.25LiMn2O4-0.25LiNi0.5Mn0.5O2 for Lithium Ion Batteries Applications

MRS Advances ◽  
2016 ◽  
Vol 1 (45) ◽  
pp. 3063-3068
Author(s):  
Mónica López de Victoria ◽  
Loraine Torres-Castro ◽  
Rajesh K. Katiyar ◽  
Jifi Shojan ◽  
Valerio Dorvilien ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Sol Gel ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Sem Images ◽  
Composite Cathodes ◽  
Composite Cathode Material

ABSTRACTThe inclusion of a spinel structure in the layered-layered composite cathode material is currently explored to enhance the cycling stability and electrochemical properties of lithium ion batteries. Li2MnO3 based composite cathodes are one of the most widely investigated positive electrodes due to their high discharge capacity and rate capability. In our studies, we have synthesized the cobalt-free layered-layered-spinel composite cathode material, 0.5Li2MnO3-0.25LiMn2O4-0.25LiNi0.5Mn0.5O2 (LLNMO), via the sol-gel method. The structure of the composition was characterized using XRD and Raman Spectroscopy in which peaks corresponding to the layered and spinel structures were identified. The morphology along with the elemental analysis were studied with SEM/EDX. The SEM images exhibited agglomerates with particle size in the nano range and the EDX analysis confirmed the presence of manganese, nickel and oxygen in the structure. The electrochemical performance was analyzed by charge/discharge studies (CD) and cyclic voltammetry (CV). The composite cathode material showed high capacity retention and good cycle stability with a coulombic efficiency of 98%. The discussed results demonstrated that LLNMO is a promising cathode material for the next generation of Li-ion batteries.

A compact silicon–carbon composite with an embedded structure for high cycling coulombic efficiency anode materials in lithium-ion batteries

2020 ◽  
Vol 7 (13) ◽  
pp. 2487-2496 ◽  
Author(s):  
Wei Zhang ◽  
Sheng Fang ◽  
Ning Wang ◽  
Jianhua Zhang ◽  
Bimeng Shi ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Coulombic Efficiency ◽  
Coal Tar ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Carbon Composite ◽  
Coal Tar Pitch ◽  
Silicon Carbon ◽  
Embedded Structure

A compact silicon–carbon composite with an embedded structure, which is prepared using coal tar pitch and nanosilicon, can be developed into an anode material with excellent structural stability and cycling performance.

SiO2@NiO core–shell nanocomposites as high performance anode materials for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 63012-63016 ◽  
Author(s):  
Yourong Wang ◽  
Wei Zhou ◽  
Liping Zhang ◽  
Guangsen Song ◽  
Siqing Cheng
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Core Shell ◽  
Excellent Cycling Stability

A SiO2@NiO core–shell electrode exhibits almost 100% coulombic efficiency, excellent cycling stability and rate capability after the first few cycles.

Hierarchically porous-structured ZnxCo1−xS@C–CNT nanocomposites with high-rate cycling performance for lithium-ion batteries

2017 ◽  
Vol 5 (44) ◽  
pp. 23221-23227 ◽  
Author(s):  
Hao Wang ◽  
Ziliang Chen ◽  
Yang Liu ◽  
Hongbin Xu ◽  
Licheng Cao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Lithium Ion Batteries ◽  
Porous Carbon ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Hybrid Nanocomposites ◽  
High Rate ◽  
Lithium Storage ◽  
Strongly Coupled ◽  
Storage Performance

Hybrid nanocomposites constructed from starfish-like ZnxCo1−xS rooted in porous carbon and strongly coupled carbon nanotubes have been rationally designed and they exhibit excellent lithium-storage performance.

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