An enhancement of electrochemical performance in lithium-ion battery via tantalum oxide coated nickel-rich cathode materials

2021 ◽  
Author(s):  
Fengling Chen ◽  
Jiannan Lin ◽  
Yifan Chen ◽  
Binbin Dong ◽  
Chujun Yin ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Large Scale ◽  
Specific Capacity ◽  
Tantalum Oxide ◽  
Rate Capability ◽  
Lithium Ion ◽  
Side Reactions ◽  
Functional Layer ◽  
Voltage Range

Abstract Nickel-rich cathode materials are increasingly being applied in commercial lithium-ion batteries to realize higher specific capacity as well as improve energy density. However, low structural stability and rapid capacity decay at high voltage and temperature hinder their rapid large-scale application. Herein, a wet chemical method followed by a post-annealing process is utilized to realize the surface coating of tantalum oxide on LiNi0.88Mn0.03Co0.09O2, and the electrochemical performance is improved. The modified LiNi0.88Mn0.03Co0.09O2 displays an initial discharge capacity of ~233 mAh/g at 0.1 C and 174 mAh/g at 1 C after 150 cycles in the voltage range of 3.0-4.4 V at 45 ℃, and it also exhibits an enhanced rate capability with 118 mAh/g at 5 C. The excellent performance is due to the introduction of tantalum oxide as a stable and functional layer to protect the surface of LiNi0.88Mn0.03Co0.09O2, and the surface side reactions and cation mixing are suppressed at the same time without hampering the charge transfer kinetics.

scholarly journals Enhanced Structural Integrity and Electrochemical Performance of AlPO4-Coated MoO2 Anode Material for Lithium-Ion Batteries

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
José I. López-Pérez ◽  
Edwin O. Ortiz-Quiles ◽  
Khaled Habiba ◽  
Mariel Jiménez-Rodríguez ◽  
Brad R. Weiner ◽  
...  
Keyword(s):  
Surface Modification ◽  
Electrochemical Performance ◽  
Anode Material ◽  
Structural Integrity ◽  
Electrochemical Impedance ◽  
Lattice Structure ◽  
Rate Capability ◽  
Lithium Ion ◽  
Microscopy Imaging ◽  
Voltage Range

AlPO4 nanoparticles were synthesized via chemical deposition method and used for the surface modification of MoO2 to improve its structural stability and electrochemical performance. Structure and surface morphology of pristine and AlPO4-coated MoO2 anode material were characterized by electron microscopy imaging (SEM and TEM) and X-ray diffraction (XRD). AlPO4 nanoparticles were observed, covering the surface of MoO2. Surface analyses show that the synthesized AlPO4 is amorphous, and the surface modification with AlPO4 does not result in a distortion of the lattice structure of MoO2. The electrochemical properties of pristine and AlPO4-coated MoO2 were characterized in the voltage range of 0.01–2.5 V versus Li/Li+. Cyclic voltammetry studies indicate that the improvement in electrochemical performance of the AlPO4-coated anode material was attributed to the stabilization of the lattice structure during lithiation. Galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) studies reveal that the AlPO4 nanoparticle coating improves the rate capability and cycle stability and contributes toward decreasing surface layer and charge-transfer resistances. These results suggest that surface modification with AlPO4 nanoparticles suppresses the elimination of oxygen vacancies in the lattice structure during cycling, leading to a better rate performance and cycle life.

scholarly journals Improved electrochemical performance of SiO2-coated Li-rich layered oxides-Li1.2Ni0.13Mn0.54Co0.13O2

2020 ◽  
Vol 31 (21) ◽  
pp. 19475-19486
Author(s):  
Jeffin James Abraham ◽  
Umair Nisar ◽  
Haya Monawwar ◽  
Aisha Abdul Quddus ◽  
R. A. Shakoor ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Sol Gel ◽  
Rate Capability ◽  
Lithium Ion ◽  
Side Reactions ◽  
Operating Voltage ◽  
Layered Oxides ◽  
Capacity Retention ◽  
Xps Characterization

AbstractLithium-rich layered oxides (LLOs) such as Li1.2Ni0.13Mn0.54Co0.13O2 are suitable cathode materials for future lithium-ion batteries (LIBs). Despite some salient advantages, like low cost, ease of fabrication, high capacity, and higher operating voltage, these materials suffer from low cyclic stability and poor capacity retention. Several different techniques have been proposed to address the limitations associated with LLOs. Herein, we report the surface modification of Li1.2Ni0.13Mn0.54Co0.13O2 by utilizing cheap and readily available silica (SiO2) to improve its electrochemical performance. Towards this direction, Li1.2Ni0.13Mn0.54Co0.13O2 was synthesized utilizing a sol–gel process and coated with SiO2 (SiO2 = 1.0 wt%, 1.5 wt%, and 2.0 wt%) employing dry ball milling technique. XRD, SEM, TEM, elemental mapping and XPS characterization techniques confirm the formation of phase pure materials and presence of SiO2 coating layer on the surface of Li1.2Ni0.13Mn0.54Co0.13O2 particles. The electrochemical measurements indicate that the SiO2-coated Li1.2Ni0.13Mn0.54Co0.13O2 materials show improved electrochemical performance in terms of capacity retention and cyclability when compared to the uncoated material. This improvement in electrochemical performance can be related to the prevention of electrolyte decomposition when in direct contact with the surface of charged Li1.2Ni0.13Mn0.54Co0.13O2 cathode material. The SiO2 coating thus prevents the unwanted side reactions between cathode material and the electrolyte. 1.0 wt% SiO2-coated Li1.2Ni0.13Mn0.54Co0.13O2shows the best electrochemical performance in terms of rate capability and capacity retention.

scholarly journals Nanohollow Carbon for Rechargeable Batteries: Ongoing Progresses and Challenges

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Jiangmin Jiang ◽  
Guangdi Nie ◽  
Ping Nie ◽  
Zhiwei Li ◽  
Zhenghui Pan ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Carbon Nanostructures ◽  
Active Sites ◽  
Electrode Materials ◽  
Mechanical Stability ◽  
High Surface ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Rechargeable Batteries

AbstractAmong the various morphologies of carbon-based materials, hollow carbon nanostructures are of particular interest for energy storage. They have been widely investigated as electrode materials in different types of rechargeable batteries, owing to their high surface areas in association with the high surface-to-volume ratios, controllable pores and pore size distribution, high electrical conductivity, and excellent chemical and mechanical stability, which are beneficial for providing active sites, accelerating electrons/ions transfer, interacting with electrolytes, and giving rise to high specific capacity, rate capability, cycling ability, and overall electrochemical performance. In this overview, we look into the ongoing progresses that are being made with the nanohollow carbon materials, including nanospheres, nanopolyhedrons, and nanofibers, in relation to their applications in the main types of rechargeable batteries. The design and synthesis strategies for them and their electrochemical performance in rechargeable batteries, including lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, and lithium–sulfur batteries are comprehensively reviewed and discussed, together with the challenges being faced and perspectives for them.

Novel Cathode Electrode with Superior Rate Capability Using Perforated Aluminum Current Collector for Lithium-Ion Batteries

2020 ◽  
Vol 12 (10) ◽  
pp. 1465-1468
Author(s):  
Jin-Ju Bae ◽  
Ji-Woong Shin ◽  
Seong-Jae Kim ◽  
Tae-Whan Hong
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Performance Indicators ◽  
Rate Capability ◽  
Lithium Ion ◽  
Current Collector ◽  
Aluminum Foil ◽  
Cathode Electrode ◽  
The Relationship

Electrodes were fabricated using a perforated aluminum current collector and a standard aluminum foil, and the relationship between the electrochemical performance of the battery and the current collector was investigated. The perforated aluminum foil improved the contact characteristics between the cathode materials particles and the current collector. Also, electrochemical performance indicators such discharge capacity and rate characteristics were improved due to the increased adhesion of the electrode using the perforated current collector.

Effects of adhesives on the electrochemical performance of monodisperse LiMn0.8Fe0.2PO4/C microspheres as cathode materials for high power lithium-ion batteries

2017 ◽  
Vol 5 (17) ◽  
pp. 7952-7960 ◽  
Author(s):  
Jianlong Li ◽  
Mingwu Xiang ◽  
Yan Wang ◽  
Jinhua Wu ◽  
Hang Zhao ◽  
...  
Keyword(s):  
High Temperature ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Spray Drying ◽  
High Power ◽  
Cathode Materials ◽  
Large Scale ◽  
Lithium Ion ◽  
Co Precipitation

A facile co-precipitation approach combined with spray-drying and high-temperature calcinations was developed to synthesize LiMn0.8Fe0.2PO4/C microspheres on a large scale.

Large-scale fabrication of porous carbon-decorated iron oxide microcuboids from Fe–MOF as high-performance anode materials for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7356-7362 ◽  
Author(s):  
Minchan Li ◽  
Wenxi Wang ◽  
Mingyang Yang ◽  
Fucong Lv ◽  
Lujie Cao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Large Scale ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
Excellent Cycling Stability ◽  
Good Rate Capability

A novel microcuboid-shaped C–Fe3O4 assembly consisting of ultrafine nanoparticles derived from Fe–MOFs exhibits a greatly enhanced performance with high specific capacity, excellent cycling stability and good rate capability as anode materials for lithium ion batteries.

scholarly journals Boosting the Rate and Cycling Performance of β-LixV2O5 Nanorods for Li Ion Battery by Electrode Surface Decoration

2019 ◽  
Author(s):  
Panpan Wang ◽  
Yue Du ◽  
Baoyou Zhang ◽  
Yanxin Yao ◽  
Yuchen Xiao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Ex Situ ◽  
Practical Application ◽  
Surface Decoration

The <i>β-</i>phase lithium vanadium oxide bronze (<i>β-</i>Li<i><sub>x</sub></i>V<sub>2</sub>O<sub>5</sub>) with high theoretic specific capacity up to 440 mAh g<sup>-1</sup> is considered as promising cathode materials, however, their practical application is hindered by its poor ionic and electronic conductivity, resulting in unsatisfied cyclic stability and rate capability. Herein, we report the surface decoration of <i>β-</i>Li<i><sub>x</sub></i>V<sub>2</sub>O<sub>5</sub> cathode using both reduced oxide graphene and ionic conductor LaPO<sub>4</sub>, which significantly promotes the electronic transfer and Li<sup>+</sup> diffusion rate, respectively. As a result, the rGO/LaPO<sub>4</sub>/Li<i><sub>x</sub></i>V<sub>2</sub>O<sub>5</sub> composite exhibits excellent electrochemical performance in terms of high reversible specific capacity of 275.7 mAh g<sup>-1</sup> with high capacity retention of 84.1% after 100 cycles at a current density of 60 mA g<sup>-1</sup>, and acceptable specific capacity of 170.3 mAh g<sup>-1</sup> at high current density of 400 mA g<sup>-1</sup>. The cycled electrode is also analyzed by electrochemical impedance spectroscopy, <i>ex-situ </i>X-ray diffraction and scanning electron microscope, providing further insights into the improvement of electrochemical performance. Our results provide an effective approach to boost the electrochemical properties of lithium vanadates for practical application in lithium ion batteries.

Effect of PPy/PEG conducting polymer film on electrochemical performance of LiFePO4 cathode material for Li-ion batteries

2013 ◽  
Vol 67 (8) ◽  
Author(s):  
Renáta Oriňáková ◽  
Andrea Fedorková ◽  
Andrej Oriňák
Keyword(s):  
Electrochemical Performance ◽  
Conducting Polymer ◽  
Cathode Materials ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Structural Defects ◽  
Portable Electronics ◽  
Lifepo4 Cathode ◽  
Conducting Polymer Films

AbstractRechargeable lithium-ion batteries (LIBs) have been the most commonly used batteries in the portable electronics market for many years. Polypyrrole (PPy) was now investigated as a conducting addition agent to enhance the cathode and anode materials performance in LIBs. Actual development in the synthesis and modification of the most promising cathode materials, LiFePO4, is described in this mini-review. The main aim of this mini-review is to highlight the effect of PPy based conducting polymer films on the electrochemical efficiency of LiFePO4 based cathode materials for LIBs summarizing our own research. Influence of the polyethylene glycol (PEG) additive in the PPy coating layer was evaluated. The improved electrochemical performance can be attributed to the enhanced electronic conductivity, higher solubility of ions originating from the electrolyte, higher movability of dissolved Li+ ions, and improved structural flexibility resulting from the incorporation of the PPy or PPy/PEG conducting polymer layer. The stabilizing effect of PEG in PPy was reflected in lowered cross-linking and reduced structural defects and, in consequence, in higher specific capacity of PPy/PEG-LiFePO4 cathodes compared to that of PPy-LiFePO4 cathodes and bare LiFePO4 cathodes.

scholarly journals Template-free synthesis of β-Na0.33V2O5microspheres as cathode materials for lithium-ion batteries

CrystEngComm ◽  
2015 ◽  
Vol 17 (26) ◽  
pp. 4774-4780 ◽  
Author(s):  
Qinguang Tan ◽  
Qinyu Zhu ◽  
Anqiang Pan ◽  
Yaping Wang ◽  
Yan Tang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Solvothermal Method ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
Subsequent Calcination ◽  
Template Free ◽  
Good Rate Capability

Hierarchical nanosheet-assembled β-Na0.33V2O5microspheres have been fabricated by a solvothermal method with subsequent calcination in air, and exhibit high specific capacity and good rate capability.

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