High-Rate Charge/Discharge Properties of Li Ion Secondary Battery Using V2O5/Carbon Composite Electrodes with Carbon Fiber

2006 ◽  
Vol 301 ◽  
pp. 159-162
Author(s):  
Akira Kuwahara ◽  
Shinya Suzuki ◽  
Masaru Miyayama
Keyword(s):  
Carbon Fiber ◽  
Current Density ◽  
High Current Density ◽  
Fiber Composite ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
High Rate ◽  
Composite Electrodes ◽  
High Electronic Conductivity ◽  
Charge Discharge

The charge/discharge properties of V2O5/carbon composites with controlled microstructures were investigated to achieve a high-rate lithium electrode performance. Composite electrodes were synthesized by mixing a V2O5 sol, carbon and a surfactant, followed by drying. V2O5/AB (acetylene black) and V2O5/VGCF (vapor-grown carbon fiber) composite electrodes showed high-rate charge/discharge properties only when they had very high carbon contents. V2O5/ (AB and VGCF) composite electrodes with controlled microstructures exhibited a discharge capacity of 245 mA·h·g-1 at a high current density of 40 A·g-1, which was approximately 70% of that at a low current density of 100 mA·g-1. The improvement in the high-rate charge/discharge properties was attributed to the short lithium ion diffusion distance, large reaction area and high electronic conductivity of those composite electrodes.

scholarly journals Effect of Prelithiation Process for Hard Carbon Negative Electrode on the Rate and Cycling Behaviors of Lithium-Ion Batteries

Batteries ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 71 ◽  
Author(s):  
Yusuke Abe ◽  
Tomoaki Saito ◽  
Seiji Kumagai
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
High Current Density ◽  
Negative Electrode ◽  
Lithium Ion ◽  
High Current ◽  
Hard Carbon ◽  
Li Ion ◽  
Charge Discharge ◽  
Ion Insertion

Two prelithiation processes (shallow Li-ion insertion, and thrice-repeated deep Li-ion insertion and extraction) were applied to the hard carbon (HC) negative electrode (NE) used in lithium-ion batteries (LIBs). LIB full-cells were assembled using Li(Ni0.5Co0.2Mn0.3)O2 positive electrodes (PEs) and the prelithiated HC NEs. The assembled full-cells were charged and discharged under a low current density, increasing current densities in a stepwise manner, and then constant under a high current density. The prelithiation process of shallow Li-ion insertion resulted in the high Coulombic efficiency (CE) of the full-cell at the initial charge-discharge cycles as well as in a superior rate capability. The prelithiation process of thrice-repeated Li-ion insertion and extraction attained an even higher CE and a high charge-discharge specific capacity under a low current density. However, both prelithiation processes decreased the capacity retention during charge-discharge cycling under a high current density, ascertaining a trade-off relationship between the increased CE and the cycling performance. Further elimination of the irreversible capacity of the HC NE was responsible for the higher utilization of both the PE and NE, attaining higher initial performances, but allowing the larger capacity to fade throughout charge-discharge cycling.

Sol-Gel Synthesis of Nanocomposite Li4Ti5O12/Carbon Nanotubes as Anode Materials for High-Rate Performance Lithium Ion Batteries

2013 ◽  
Vol 833 ◽  
pp. 45-49 ◽  
Author(s):  
Xiao Wei Miao ◽  
Hong Ming He ◽  
Li Yi Shi ◽  
Xin Luo Zhao ◽  
Jian Hui Fang
Keyword(s):  
Carbon Nanotubes ◽  
High Current Density ◽  
Sol Gel ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Cycling Performance ◽  
High Rate ◽  
The Matrix ◽  
Rate Capacity ◽  
Sol Gel Synthesis

Abstract. Nanocomposite Li4Ti5O12/carbon nanotubes (Li4Ti5O12/CNTs) are facilely synthesized by a sol-gel method. The crystal structure and morphology of the nanocomposite Li4Ti5O12/CNTs are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. CNTs play the important role just like a big network connecting the nanoparticles of Li4Ti5O12, which provides a good channel for electronic conductivity and ion transport. Within the cut-off voltage between 1-2.4V, the initial discharge capacity of Li4Ti5O12/CNTs material is 179.6 mAh/g at the rate of 0.1C. The capacity retentions are 95.5% and 90.6% of Li4Ti5O12 with and without CNTs, respectively. At high current density of 10C, Li4Ti5O12/CNTs delivers the initial capacity of 141.5 mAh/g, and without any capacity loss after charge/discharge 100 cycles. The matrix of CNTs plays important roles in increasing the conductivity and avoiding the aggregation of Li4Ti5O12, which lead to high-rate capacity and cycling performance.

Cr0.5Nb24.5O62 Nanowires with High Electronic Conductivity for High-Rate and Long-Life Lithium-Ion Storage

ACS Nano ◽  
2017 ◽  
Vol 11 (4) ◽  
pp. 4217-4224 ◽  
Author(s):  
Chao Yang ◽  
Shu Yu ◽  
Chunfu Lin ◽  
Fan Lv ◽  
Shunqing Wu ◽  
...  
Keyword(s):  
Electronic Conductivity ◽  
Lithium Ion ◽  
High Rate ◽  
High Electronic Conductivity ◽  
Ion Storage ◽  
Long Life

scholarly journals Surface nitridation of Li4Ti5O12 by thermal decomposition of urea to improve quick charging capability of lithium ion batteries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jihyun Jang ◽  
Tae Hun Kim ◽  
Ji Heon Ryu
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
High Rate ◽  
High Electronic Conductivity ◽  
Negative Electrode Material ◽  
Initial Coulombic Efficiency

AbstractAs the application of lithium-ion batteries in electric vehicles increases, the demand for improved charging characteristics of batteries is also increasing. Lithium titanium oxide (Li4Ti5O12, LTO) is a negative electrode material with high rate characteristics, but further improvement in rate characteristics is needed for achieving the quick-charging performance required by electric vehicle markets. In this study, the surface of LTO was coated with a titanium nitride (TiN) layer using urea and an autogenic reactor, and electrochemical performance was improved (initial Coulombic efficiency and the rate capability were improved from 95.6 to 4.4% for pristine LTO to 98.5% and 53.3% for urea-assisted TiN-coated LTO, respectively. We developed a process for commercial production of surface coatings using eco-friendly material to further enhance the charging performance of LTO owing to high electronic conductivity of TiN.

Soft-templated LiFePO4/mesoporous carbon nanosheets (LFP/meso-CNSs) nanocomposite as the cathode material of lithium ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (41) ◽  
pp. 21325-21331 ◽  
Author(s):  
Ruofei Wu ◽  
Guofeng Xia ◽  
Shuiyun Shen ◽  
Fengjuan Zhu ◽  
Fengjing Jiang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Mesoporous Carbon ◽  
Electronic Conductivity ◽  
Active Material ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Carbon Nanosheets ◽  
High Electronic Conductivity ◽  
Nano Size

A soft-templated LFP/mesoporous carbon nanosheets (LFP/meso-CNSs) nanocomposite as the cathode of lithium ion batteries displays an excellent high-rate capability and stable cycling property, benefitting from its high electronic conductivity, open mesoporosity, and the nano-size of its active material.

On-site evolution of ultrafine ZnO nanoparticles from hollow metal–organic frameworks for advanced lithium ion battery anodes

2017 ◽  
Vol 5 (43) ◽  
pp. 22512-22518 ◽  
Author(s):  
Yiqiong Zhang ◽  
Yanbing Lu ◽  
Shi Feng ◽  
Dongdong Liu ◽  
Zhaoling Ma ◽  
...  
Keyword(s):  
Current Density ◽  
Zno Nanoparticles ◽  
High Current Density ◽  
Metal Organic Frameworks ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
High Current ◽  
Metal Organic ◽  
Hollow Metal

With unique hollow frameworks decorated with well-dispersed ultrafine ZnO nanoparticles, the h-ZIF-8@ZnO hybrids exhibit good cycling performance with a reversible capacity of ∼637.9 mA h g−1 at a high current density of 1.0 A g−1 after 500 cycles.

TiN-nanorod-coated carbon fiber cathode for high-current-density electron emission

Vacuum ◽  
2019 ◽  
Vol 162 ◽  
pp. 137-144 ◽  
Author(s):  
Limin Li ◽  
Songling Fu ◽  
Xiuxiang Huang ◽  
Qiang Tang ◽  
Ke Peng ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Current Density ◽  
Electron Emission ◽  
High Current Density ◽  
High Current ◽  
Coated Carbon
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