Modification of High Potential, High Capacity Li2FeP2O7 Cathode Material for Lithium Ion Batteries

2012 ◽  
Vol 1440 ◽  
Author(s):  
Jiajia Tan ◽  
Ashutosh Tiwari
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Discharge Rates ◽  
Electronic Conductivities ◽  
Fast Discharge

ABSTRACTLi2FeP2O7 is a newly developed polyanionic cathode material for high performance lithium ion batteries. It is considered very attractive due to its large specific capacity, good thermal and chemical stability, and environmental benignity. However, the application of Li2FeP2O7 is limited by its low ionic and electronic conductivities. To overcome the above problem, a solution-based technique was successfully developed to synthesize Li2FeP2O7 powders with very fine and uniform particle size (< 1 μm), achieving much faster kinetics. The obtained Li2FeP2O7 powders were tested in lithium ion batteries by measurements of cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge cycling. We found that the modified Li2FeP2O7 cathode could maintain a relatively high capacity even at fast discharge rates.

Chemical Modification Graphene as a High Performance Anode Material for Lithium-Ion Batteries

2018 ◽  
Vol 913 ◽  
pp. 779-785
Author(s):  
Zhong Yi Chen ◽  
Kun Ma ◽  
De Guo Zhou ◽  
Yan Liu ◽  
Yan Zong Zhang
Keyword(s):  
Chemical Modification ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Anode Material ◽  
High Performance ◽  
Copper Foil ◽  
Electrochemical Impedance ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Membrane Electrode

A novel membrane electrode was fabricated by coating conductive slurry (K/Graphene composites as its important component) on copper foil. The membrane electrode, as anode of lithium ion battery, exhibited excellent columbic efficiency and specific capacity of 831 mAh g-1 after 1000 cycles. The K/Graphene composites presented a multi-layer nanostructure. It provided not only more intercalation space and intercalation sites for Li+ during the Li+ intercalation/extraction, but also alleviated the agglomeration of dispersed nanocrystals, as well as decreased the electrochemical impedance. The results suggest that the membrane electrode holds great potential as an anode material for LIBs.

scholarly journals Silicon-Nanographite Aerogel-Based Anodes for High Performance Lithium Ion Batteries

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Manisha Phadatare ◽  
Rohan Patil ◽  
Nicklas Blomquist ◽  
Sven Forsberg ◽  
Jonas Örtegren ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Large Scale ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Life Cycles ◽  
Scale Production ◽  
Silicon Anodes

Abstract To increase the energy storage density of lithium-ion batteries, silicon anodes have been explored due to their high capacity. One of the main challenges for silicon anodes are large volume variations during the lithiation processes. Recently, several high-performance schemes have been demonstrated with increased life cycles utilizing nanomaterials such as nanoparticles, nanowires, and thin films. However, a method that allows the large-scale production of silicon anodes remains to be demonstrated. Herein, we address this question by suggesting new scalable nanomaterial-based anodes. Si nanoparticles were grown on nanographite flakes by aerogel fabrication route from Si powder and nanographite mixture using polyvinyl alcohol (PVA). This silicon-nanographite aerogel electrode has stable specific capacity even at high current rates and exhibit good cyclic stability. The specific capacity is 455 mAh g−1 for 200th cycles with a coulombic efficiency of 97% at a current density 100 mA g−1.

scholarly journals A novel method for preparing α-LiFeO2 nanorods for high-performance lithium-ion batteries

Ionics ◽  
2019 ◽  
Vol 26 (2) ◽  
pp. 1057-1061
Author(s):  
Youzuo Hu ◽  
Xingquan Liu
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Performance ◽  
Hydrothermal Process ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Novel Method ◽  
Lithium Ion Diffusion

AbstractOne-dimensional (1D) α-LiFeO2 nanorods are successfully prepared via a low-temperature solid-state reaction from α-FeOOH nanorods synthesized by hydrothermal process and used as cathode materials in lithium-ion batteries. As cathode material for lithium-ion batteries, the nanorods can achieve a high initial specific capacity of 165.85 mAh/g at 0.1 C for which a high capacity retention of 81.65% can still be obtained after 50 cycles. The excellent performance and cycling stability are attributed to the unique 1D nanostructure, which facilitates the rapid electron exchange and fast lithium-ion diffusion between electrolyte and cathode materials.

scholarly journals Sulfur-Doped Graphdiyne as a High-Capacity Anode Material for Lithium-Ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1161
Author(s):  
Fanan Kong ◽  
Yong Yue ◽  
Qingyin Li ◽  
Shijie Ren
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Modular Design ◽  
High Current Density ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Fast Diffusion ◽  
Main Challenge

Heteroatom doping is regarded as a promising approach to enhance the electrochemical performance of carbon materials, while the poor controllability of heteroatoms remains the main challenge. In this context, sulfur-doped graphdiyne (S-GDY) was successfully synthesized on the surface of copper foil using a sulfur-containing multi-acetylene monomer to form a uniform film. The S-GDY film possesses a porous structure and abundant sulfur atoms decorated homogeneously in the carbon skeleton, which facilitate the fast diffusion and storage of lithium ions. The lithium-ion batteries (LIBs) fabricated with S-GDY as anode exhibit excellent performance, including the high specific capacity of 920 mA h g−1 and superior rate performances. The LIBs also show long-term cycling stability under the high current density. This result could potentially provide a modular design principle for the construction of high-performance anode materials for lithium-ion batteries.

Nanoplate-stacked baguette-like LiVO3 as a high performance cathode material for lithium-ion batteries

2015 ◽  
Vol 3 (16) ◽  
pp. 8750-8755 ◽  
Author(s):  
Zhongxue Chen ◽  
Liufei Cao ◽  
Liang Chen ◽  
Haihui Zhou ◽  
Kai Xie ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion

Nanoplate-stacked baguette-like LiVO3 demonstrates a high capacity of 275.6 mA h g−1 with stable cycling and superior rate capability.

High Performance Tin-coated Vertically Aligned Carbon Nanofiber Array Anode for Lithium-ion Batteries

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3519-3524
Author(s):  
Gaind P. Pandey ◽  
Kobi Jones ◽  
Emery Brown ◽  
Jun Li ◽  
Lamartine Meda
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Carbon Nanofiber ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Vertically Aligned ◽  
Vertically Aligned Carbon Nanofiber

ABSTRACTThis study reports a high-performance tin (Sn)-coated vertically aligned carbon nanofiber array anode for lithium-ion batteries. The array electrodes have been prepared by coaxial sputter-coating of tin (Sn) shells on vertically aligned carbon nanofiber (VACNF) cores. The robust brush-like highly conductive VACNFs effectively connect high-capacity Sn shells for lithium-ion storage. A high specific capacity of 815 mAh g-1 of Sn was obtained at C/20 rate, reaching toward the maximum value of Sn. However, the electrode shows poor cycling performance with conventional LiPF6 based organic electrolyte. The addition of fluoroethylene carbonate (FEC) improve the performance significantly and the Sn-coated VACNFs anode shows stable cycling performance. The Sn-coated VACNF array anodes exhibit outstanding capacity retention in the half-cell tests with electrolyte containing 10 wt.% FEC and could deliver a reversible capacity of 480 mAh g-1 after 50 cycles at C/3 rate.

scholarly journals Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

2021 ◽  
Vol 10 (1) ◽  
pp. 210-220
Author(s):  
Fangfang Wang ◽  
Ruoyu Hong ◽  
Xuesong Lu ◽  
Huiyong Liu ◽  
Yuan Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Low Cost ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Chemical Route ◽  
High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

Sign in / Sign up

Export Citation Format

Share Document