Effect of Doping Ions on Electrochemical Properties of LiFePO4 Cathode

2011 ◽  
Vol 197-198 ◽  
pp. 1135-1138 ◽  
Author(s):  
Yan Li Ruan
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Solid State Reaction Method ◽  
Inert Atmosphere ◽  
Cycle Performance ◽  
Performance Measurements ◽  
Reaction Method ◽  
Large Current

Lithium iron phosphate (LiFePO4) cathode materials containing different low concentration ion dopants (Mg2+, Al3+, Zr4+, and Nb5+) were prepared by a solid-state reaction method in an inert atmosphere. The effects of the doping ions on the properties of as-synthesized cathode materials were investigated. XRD results indicate that the ion dopants do not affect the structure of the materials. The galvanostatically charge and discharge tests show that ion dopants can considerably improve the electrochemical performance of the materials, especially large current discharge behaviors. LiFePO4 samples doped with Nb5+have an initiate capacity of 146.8 mAh•g-1at 0.1C. Further cycle performance measurements reveal the sample doped with Nb5+shows the best cycleability. The results also verify that LiFePO4doped with ions of suited radius and higher valence shows better electrochemical characters.

Surfactants assisted synthesis of nano-LiFePO4/C composite as cathode materials for lithium-ion batteries

2015 ◽  
Vol 3 (5) ◽  
pp. 2025-2035 ◽  
Author(s):  
Qingyu Li ◽  
Fenghua Zheng ◽  
Youguo Huang ◽  
Xiaohui Zhang ◽  
Qiang Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Lithium Ion ◽  
Solid State Reaction Method ◽  
Electrochemical Performances ◽  
Reaction Method

The solid state reaction method was applied to prepare a series of LiFePO4/C materials by adding various surfactants. The as-prepared LiFePO4/C particles using various surfactants show different electrochemical performances.

scholarly journals Improved electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode materials via incorporation of rubidium cations into the original Li sites

RSC Advances ◽  
2017 ◽  
Vol 7 (81) ◽  
pp. 51721-51728 ◽  
Author(s):  
Zhili Zhang ◽  
Donghui Chen ◽  
Chengkang Chang
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method

Layered RbxLi(1−x)Ni0.8Co0.1Mn0.1O2 (x = 0, 0.005, 0.01, 0.02) materials were synthesized with different Rb concentrations using a solid state reaction method.

Preparation and characterization of nanoscale LiFePO4 cathode materials by a two-step solid-state reaction method

2016 ◽  
Vol 52 (4) ◽  
pp. 2366-2372 ◽  
Author(s):  
Wen-hua Cheng ◽  
Lei Wang ◽  
Qi-bing Zhang ◽  
Zhao-jun Wang ◽  
Jin-bao Xu ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Lifepo4 Cathode

Effect of the Doping Ni and Overdosing Lithium for Synthesis LiMn2O4 Cathode Material by the Solid State Reaction Method

2013 ◽  
Vol 457-458 ◽  
pp. 93-97
Author(s):  
Yen Chun Liu ◽  
Ming Cheng Liu ◽  
Robert Lian Huey Liu ◽  
Mao Chieh Chi
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Lithium Battery ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Attrition Rates ◽  
Reaction Method ◽  
Initial Capacity

The study with Li2CO3 and Mn3O4 through the solid state reaction makes cathode material for lithium battery spinel - LiMn2O4. According to past literature, under the solid-state reaction. The experiment carries out sintering at temperature of 850°C.. Cathode materials under these sintering temperatures are made to fabricate battery. For Ni doped LiMn2O4, the capacitance decreasing speed is slow and stable; after 15 times charging-discharging cycles, the attrition rates were 3.05 % or less. The result of experiment demonstrates that the best sintering temperature is at 850°C. Under the condition of 850°C, various contents for extra amount of lithium (1.02 mole-1.1 mole) are fabricated and range of working voltage is released. It is found a further increase of initial capacity to 140.51 mAh/g. LiMn2O4 further extends circulation and usage.

scholarly journals Review of Modified Nickel-Cobalt Lithium Aluminate Cathode Materials for Lithium-Ion Batteries

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Ding Wang ◽  
Weihong Liu ◽  
Xuhong Zhang ◽  
Yue Huang ◽  
Mingbiao Xu ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Cycle Performance ◽  
Future Research ◽  
Lithium Aluminate ◽  
Nickel Cobalt ◽  
Lithium Cobaltate

Ternary nickel-cobalt lithium aluminate LiNixCoyAl1‐x‐yO2 (NCA, x≥0.8) is an essential cathode material with many vital advantages, such as lower cost and higher specific capacity compared with lithium cobaltate and lithium iron phosphate materials. However, the noticeably irreversible capacity and reduced cycle performance of NCA cathode materials have restricted their further development. To solve these problems and further improve the electrochemical performance, numerous research studies on material modification have been conducted, achieving promising results in recent years. In this work, the progress of NCA cathode materials is examined from the aspects of surface coating and bulk doping. Furthermore, future research directions for NCA cathode materials are proposed.

Studies on the low-heating solid-state reaction method to synthesize LiNi1/3Co1/3Mn1/3O2 cathode materials

2007 ◽  
Vol 174 (2) ◽  
pp. 701-704 ◽  
Author(s):  
Jingjing Liu ◽  
Weihua Qiu ◽  
Lingyan Yu ◽  
Guohua Zhang ◽  
Hailei Zhao ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method

scholarly journals Pembuatan Katoda Baterai Lithium Ion Iron Phospate (LiFePO4) dengan Metode Solid State Reaction

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Elizabeth Putri Permatasari ◽  
Mega Permata Rindi ◽  
Agus Purwanto
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Single Phase ◽  
Lithium Iron Phosphate ◽  
Process Condition ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Calcination Temperatures

<p>One of the most finest materials for lithium ion battery nowadays is lithium iron phosphate or LiFePO4. Lithium iron phosphate was synthesized with solid state reaction method  by  optimizing  the  variable  of  material  and  temperature.  The  variable  for calcination temperatures were 700oC, 800oC, and 900oC while the basic materials as Fe sources were Fe2O3 and FeSO4. Particles morphologies and quantity of crystal were investigated in details by X-ray diffraction analysis XRD. XRD imaging showed diffraction of nanoparticles LiFePO4 with crystal quantity 40,4% (800oC) and 59,1% (900oC) of materials Fe2O3,which the most quantity from other samples. Thus, chatode materials were made from LiFePO4 that synthesized at calcination temperatures 800oC and 900oC. In conclusion the material chatode from LiFePO4 that had been synthesized had so many impurities because it was hard to get single phase of nanoparticles LiFePO4 and need more improvement in optimizing the process condition for ideal chatode material.</p>

scholarly journals Synthesizing nonstoichiometric Li3−3xV2+x(PO4)3/C as cathode materials for high-performance lithium-ion batteries by solid state reaction

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 32721-32726 ◽  
Author(s):  
Pingping Sun ◽  
Ningang Su ◽  
Yuanting Wang ◽  
Qingyu Xu ◽  
Qi Fan ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
High Performance ◽  
Lithium Ion ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Simple Solid State Reaction

A simple solid state reaction method has been developed to synthesize nonstoichiometric Li3−3xV2+x(PO4)3/C (x = 0–0.15) nanocomposites.

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