scholarly journals Synthesis and Characterization of LiFePO4–PANI Hybrid Material as Cathode for Lithium-Ion Batteries

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2834
Author(s):  
Cesario Ajpi ◽  
Naviana Leiva ◽  
Max Vargas ◽  
Anders Lundblad ◽  
Göran Lindbergh ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Rate ◽  
Electrochemical Characterizations ◽  
Rate Capability ◽  
Lithium Ion ◽  
Chemical Oxidation ◽  
Degree Of Crystallinity ◽  
Favorable Effect ◽  
A Charge ◽  
Charge Discharge

This work focuses on the synthesis of LiFePO4–PANI hybrid materials and studies their electrochemical properties (capacity, cyclability and rate capability) for use in lithium ion batteries. PANI synthesis and optimization was carried out by chemical oxidation (self-assembly process), using ammonium persulfate (APS) and H3PO4, obtaining a material with a high degree of crystallinity. For the synthesis of the LiFePO4–PANI hybrid, a thermal treatment of LiFePO4 particles was carried out in a furnace with polyaniline (PANI) and lithium acetate (AcOLi)-coated particles, using Ar/H2 atmosphere. The pristine and synthetized powders were characterized by XRD, SEM, IR and TGA. The electrochemical characterizations were carried out by using CV, EIS and galvanostatic methods, obtaining a capacity of 95 mAhg−1 for PANI, 120 mAhg−1 for LiFePO4 and 145 mAhg−1 for LiFePO4–PANI, at a charge/discharge rate of 0.1 C. At a charge/discharge rate of 2 C, the capacities were 70 mAhg−1 for LiFePO4 and 100 mAhg−1 for LiFePO4–PANI, showing that the PANI also had a favorable effect on the rate capability.

scholarly journals High Discharge Rate Lithium Ion Batteries with the Composite Cathode of LiFePO4/Mesocarbon Nanobead

2010 ◽  
Vol 177 ◽  
pp. 208-210
Author(s):  
Yi Jie Gu ◽  
Cui Song Zeng ◽  
Yu Bo Chen ◽  
Hui Kang Wu ◽  
Hong Quan Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Room Temperature ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Rate Performance ◽  
High Discharge ◽  
High Discharge Rate ◽  
Lifepo4 Cathode

Olivine compounds LiFePO4 were prepared by the solid state reaction, and the electrochemical properties were studied with the composite cathode of LiFePO4/mesocarbon nanobead. High discharge rate performance can be achieved with the designed composite cathode of LiFePO4/mesocarbon nanobead. According to the experiment results, batteries with the composite cathode deliver discharge capacity of 1087mAh for 18650 type cell at 20C discharge rate at room temperature. The analysis shows that the uniformity of mesocarbon nanobead around LiFePO4 can supply enough change for electron transporting, which can enhance the rate capability for LiFePO4 cathode lithium ion batteries. It is confirmed that lithium ion batteries with LiFePO4 as cathode are suitable to electric vehicle application.

scholarly journals Stretchable batteries with gradient multilayer conductors

2019 ◽  
Vol 5 (7) ◽  
pp. eaaw1879 ◽  
Author(s):  
Minsu Gu ◽  
Woo-Jin Song ◽  
Jaehyung Hong ◽  
Sung Youb Kim ◽  
Tae Joo Shin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Multiple Scales ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Charge Storage ◽  
Storage Devices ◽  
Essential Components ◽  
Stretchable Conductors ◽  
A Charge

Stretchable conductors are essential components in next-generation deformable and wearable electronic devices. The ability of stretchable conductors to achieve sufficient electrical conductivity, however, remains limited under high strain, which is particularly detrimental for charge storage devices. In this study, we present stretchable conductors made from multiple layers of gradient assembled polyurethane (GAP) comprising gold nanoparticles capable of self-assembly under strain. Stratified layering affords control over the composite internal architecture at multiple scales, leading to metallic conductivity in both the lateral and transversal directions under strains of as high as 300%. The unique combination of the electrical and mechanical properties of GAP electrodes enables the development of a stretchable lithium-ion battery with a charge-discharge rate capability of 100 mAh g−1 at a current density of 0.5 A g−1 and remarkable cycle retention of 96% after 1000 cycles. The hierarchical GAP nanocomposites afford rapid fabrication of advanced charge storage devices.

Preparation and Characterization of High-Voltage Cathode Material LiNi0.5Mn1.5O4 for Lithium Ion Batteries

2019 ◽  
Vol 953 ◽  
pp. 121-126
Author(s):  
Zhe Chen ◽  
Quan Fang Chen ◽  
Sha Ne Zhang ◽  
Guo Dong Xu ◽  
Mao You Lin ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Synthesis Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Diffusion Path ◽  
High Energy ◽  
High Energy Density ◽  
Charge Discharge

High energy density and rechargeable lithium ion batteries are attracting widely interest in renewable energy fields. The preparation of the high performance materials for electrodes has been regarded as the most challenging and innovative aspect. By utilizing a facile combustion synthesis method, pure nanostructure LiNi0.5Mn1.5O4 cathode material for lithium ion batteries were successfully fabricated. The crystal phase of the samples were characterized by X-Ray Diffraction, and micro-morphology as well as electrochemistry properties were also evaluated using FE-SEM, electrochemical charge-discharge test. The result shows the fabricated LiNi0.5Mn1.5O4 cathode materials had outstanding crystallinity and near-spherical morphologies. That obtained LiNi0.5Mn1.5O4 samples delivered an initial discharge capacity of 137.2 mAhg-1 at the 0.1 C together with excellent cycling stability and rate capability as positive electrodes in a lithium cell. The superior electrochemical performance of the as-prepared samples are owing to nanostructure particles possessing the shorter diffusion path for Li+ transport, and the nanostructure lead to large contact area to effectively improve the charge/discharge properties and the rate property. It is demonstrated that the as-prepared nanostructure LiNi0.5Mn1.5O4 samples have potential as cathode materials of lithium-ion battery for future new energy vehicles.

Hollow core–shell structured Si/C nanocomposites as high-performance anode materials for lithium-ion batteries

Nanoscale ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 3138-3142 ◽  
Author(s):  
Huachao Tao ◽  
Li-Zhen Fan ◽  
Wei-Li Song ◽  
Mao Wu ◽  
Xinbo He ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Core Shell ◽  
Discharge Process ◽  
Hollow Core ◽  
A Charge ◽  
Large Volume Change ◽  
Charge Discharge

Hollow core–shell structured Si/C nanocomposites were prepared to adapt for the large volume change during a charge–discharge process.

NiFe saponite as a new anode material for high-performance lithium-ion batteries

2020 ◽  
Vol 8 (14) ◽  
pp. 6539-6545
Author(s):  
Jian Zhang ◽  
Qing Yin ◽  
Jianeng Luo ◽  
Jingbin Han ◽  
Lirong Zheng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
Discharge Density ◽  
A Charge ◽  
First Time ◽  
Charge Discharge

NiFe saponite was discovered for the first time as a new anode material for high-performance lithium-ion batteries, delivering a high capacity of 646 mA h g−1 after 1000 cycles with a charge/discharge density of 500 mA g−1.

scholarly journals Porous Germanium Anode Material for Lithium-Ion Batteries

2020 ◽  
Vol 9 (4) ◽  
pp. 1398-1400
Keyword(s):  
Surface Morphology ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Discharge Rate ◽  
Lithium Ion ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Implantation Dose ◽  
Different Doses ◽  
Charge Discharge

This work is devoted to the development of porous germanium anode material for lithium-ion batteries. Samples of porous germanium were fabricated by ion implantation of Co+ ions in single-crystal germanium plates. The surface morphology of porous germanium samples with an increase in the implantation dose of Co+ ions was studied. Scanning electron microscopy study revealed that the implantation leaded to the formation of porosity of the surface and the surface morphology differed for different doses of implantation. It is assumed that the obtained Ge material with a porous surface can be used as effective anode material in lithium-ion batteries and will show an increased capacity and charge / discharge rate relative to traditionally used graphite

Li5Cr7Ti6O25 as a novel negative electrode material for lithium-ion batteries

2015 ◽  
Vol 51 (74) ◽  
pp. 14050-14053 ◽  
Author(s):  
Ting-Feng Yi ◽  
Jie Mei ◽  
Yan-Rong Zhu ◽  
Zi-Kui Fang
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Material ◽  
Sol Gel ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Discharge Performance ◽  
Gel Method ◽  
Negative Electrode Material ◽  
Charge Discharge

Novel submicron Li5Cr7Ti6O25, which exhibits excellent rate capability, high cycling stability and fast charge–discharge performance, is constructed using a facile sol–gel method.

Synthesis and Characterization of Li2FeSiO4/C Composite as Cathode for Lithium Ion Batteries from Silica Waste

2013 ◽  
Vol 448-453 ◽  
pp. 2974-2978
Author(s):  
Xiao Mei Wang ◽  
Jun Tao Mei ◽  
Qing Tang Zhang ◽  
Hui Xia Feng ◽  
Ming Yang Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrochemical Impedance ◽  
Discharge Rate ◽  
Lithium Ion ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Specific Discharge ◽  
A Charge ◽  
Charge Discharge

Li2FeSiO4/C composites were prepared from silica waste by a traditional solid-state reaction method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), elementary analyzer, galvanostatic charge-discharge test and electrochemical impedance spectroscopy. XRD results reveal that Li2FeSiO4/C composites fabricated from silica waste have some impurity. SEM results indicate that the particle size of Li2FeSiO4 composites is nearly accord with the particle size of silica waste. Electrochemical measurements indicate that Li2FeSiO4/C composite prepared from silica waste have comparatively good electrochemical performance. It can deliver a specific discharge capacity of 137.6 mAh g-1 at a charge-discharge rate of 0.1 C.

A SnO2@carbon nanocluster anode material with superior cyclability and rate capability for lithium-ion batteries

Nanoscale ◽  
2013 ◽  
Vol 5 (8) ◽  
pp. 3298 ◽  
Author(s):  
Min He ◽  
Lixia Yuan ◽  
Xianluo Hu ◽  
Wuxing Zhang ◽  
Jie Shu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Rate Capability ◽  
Lithium Ion
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