Preparation of Precursor of Lini0.5mn1.5o4 with High Density

2012 ◽  
Vol 463-464 ◽  
pp. 881-884 ◽  
Author(s):  
Chao Lin Miao ◽  
Lu Shi ◽  
Gai Rong Chen ◽  
Dong Mei Dai
Keyword(s):  
Cathode Material ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
Filter Cake ◽  
Lithium Ion ◽  
High Density ◽  
Cycle Performance ◽  
Precipitation Method ◽  
Tap Density ◽  
The Relationship

The precursor of LiNi0.5MnSubscript text1.5O4cathode material with high density was synthesized by two-dryness co-precipitation method. The optimized parameters were found out by studying the relationship between the density of precursor and the concentration of reactants, the manner of adding agglomerating agent, the remaining water in filter cake and the manner of dryness. The highest density (1.74 g/cm3) of precursor can be achieved under optimized condition: NiSO40.375 mol/L, coagulation agent added with little amount but many times, 28% of water in filter cake and two-step dryness, which is much better than that made by other methods. Our experiment provides a significant reference for the synthesis of excellent-performance cathode materials of lithium-ion battery. LiNi0.5MnSubscript text1.5O4has a good cycle performance, a higher discharge capacity and a discharge platform of 4.7v, so it has become a research focus of 5-voltage cathode materials in the field of lithium ion battery recently.[1-4] However, LiNi0.5Mn1.5O4 prepared by common methods usually has a lower tap volume capacity.[5-9] HiroyuKi Ito[6] reported a continuous fabricated high-density cobalt-manganese-doped nickel hydroxide method with which the density of product was between 1.5-1.91g/cm3, however the used ammonia as a complexation agent in the preparation process not only increased the cost of the preparation, but also led to environmental pollution. Research results show that the cathode material synthesized using high-density precursor has a higher tap density, a larger volume capacity and a good electrochemical performance.[10] In this paper, we find out the optimized parameters of preparation of precursor of LiNi0.5MnSubscript text1.5O4by studying the relationship between the density of precursor and concentration of reactants, the manner of adding agglomerating agent, the remaining water in filter cake and the manner of dryness.

Preparation of Regenerated Cathode Material Lithium Nickel Cobalt Oxide LiNi0.7Co0.3O2 Form Spent Lithium-Ion Battery

2019 ◽  
Vol 944 ◽  
pp. 1179-1186 ◽  
Author(s):  
Yue Hua Wang ◽  
Li Wen Ma ◽  
Yun He Zhang ◽  
Zhao Jie Huang ◽  
Xiao Li Xi
Keyword(s):  
High Temperature ◽  
Cathode Material ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Lithium Hydroxide ◽  
Nickel Cobalt ◽  
Aluminum Ions ◽  
Nickel Cobalt Oxide ◽  
Lithium Nickel Cobalt Oxide

With the development of new energy vehicles, urgent issues have attracted considerable attention. Some power batteries have entered the scrapping period, with the imperative recycling of used power batteries. Some studies have predicted that by 2020, the amount of power lithium battery scrap will reach 32.2 GWh, corresponding to ~500,000 tons, and by 2023, the scrap will reach 101 GWh, corresponding to ~1.16 million tons. In this study, nickel-cobalt-lithium LiNi0.7Co0.3O2cathode materials are regenerated from spent lithium-ion battery cathode materials as the raw material, which not only aids in the reduction of pressure on the environment but also leads to the recycling of resources. First, extraction is employed using extracting agent p204 to remove aluminum ions from an acid leaching solution. Extraction conditions for aluminum ions are: include a phase ratio of 1:2,a pH of 3, an extractant concentration of 30%, and a saponification rate of 70%.Next, the precursor was prepared by co-precipitation using sodium hydroxide and ammonia water as the precipitant and complexion agents, respectively; hence, the cathode material can be uniformly mixed at the atomic level. The precursor and lithium hydroxide were subjected to calcination at high temperature using a high-temperature solid-phase method. The Calcination conditions include an air atmosphere ; a calcination temperature of 800° °C ; a calcination time of 15 h, an n (precursor): n (lithium hydroxide) ratio of 1:1.1.The Thermogravimetric analysis revealed that the synthesis temperature should not exceed 850°C. X-ray diffraction analysis, scanning electron microscopy, and energy spectrum analysis of the cathode material revealed a composition comprising Li, Ni, and Co oxides. After analysis, the material obtained is lithium nickel-cobalt-oxide, LiNi0.7Co0.3O2, which is a positive electrode material with good crystallinity and a regular layered structure.

Improved cycle performance of Li[Li0.2Mn0.54Co0.13Ni0.13]O2 by Ga doping for lithium ion battery cathode material

2017 ◽  
Vol 301 ◽  
pp. 64-71 ◽  
Author(s):  
Tianheng Yu ◽  
Jianling Li ◽  
Guofeng Xu ◽  
Jiguang Li ◽  
Feixiang Ding ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Ga Doping

On the Latest Development of some Typical Cathode Materials for Lithium Ion Battery

2018 ◽  
Vol 783 ◽  
pp. 137-143
Author(s):  
Yong Tao Zhang ◽  
Xiao Li Hu
Keyword(s):  
Thermal Stability ◽  
Power Systems ◽  
Cathode Material ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Modern Society ◽  
High Rate ◽  
Good Thermal Stability

The lithium-ion battery is widely and increasingly used in many portable electronic devices and high-power systems in the modern society. Currently, it is significant to develop excellent cathode materials to meet stringent standards for batteries. In this paper, recent developments were reviewed for several typical cathode materials with high voltages and good capacities. These cathode materials referred to LiCoO2, LiNiO2, LiMn2O4, LiMPO4 (M=Fe, Mn, Co and Ni, et al), and their composites. The technical bottlenecks about the cathode material is required to be conquered. For instance, LiCoO2 and LiNiO2 have high coulombic capacity and good cycling characteristics, but are costly and exhibit poor thermal stability. Simultaneously, LiMn2O4 exhibit good thermal stability, high voltage and high rate capability, but have low capacity. Thus it is advantageous to produce a composite which shares the benefits of both materials. The composite cathode material is superior over any single electrode material because the former has more balanced performance, and therefore, is promising to manufacture the next generation of batteries.

Effects of Morphological Collapse of Sphere Secondary Particles on Electrochemical Properties of a LiNi0.83Co0.11Mn0.06O2 Cathode Material for Lithium-Ion Batteries

2020 ◽  
Vol 12 (9) ◽  
pp. 1278-1282
Author(s):  
Jun-Seok Park ◽  
Un-Gi Han ◽  
Gyu-Bong Cho ◽  
Hyo-Jun Ahn ◽  
Ki-Won Kim ◽  
...  
Keyword(s):  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Phase Method ◽  
Electrochemical Characteristics ◽  
Secondary Particles ◽  
Tap Density

Li[NixCoyMnz]O2 (LiNCM) is one of the candidate cathode material that can replace the currently commercialized LiCoO2 (LCO) cathode material for lithium-ion batteries (LiBs). The morphological feature having primary particle and secondary sphere particle could affect structural stability, tap density and electrochemical performance of LiNCM. In this work, two LiNCM particles without or with the morphological collapse of the secondary particles were prepared by using a co-precipitation-assisted, solid-phase method and ball milling, and its morphological, structural and electrochemical characteristics were evaluated. The results of XRD, and FESEM demonstrated that the as-prepared two LiNCMs have a typical α-NaFeO2 layered structure and the two morphological features of secondary particles needed in this study. The results of electrochemical properties indicated that the LiNCM electrode without collapsed secondary particles have a good stability in cycle performance compared to that with collapse of secondary particles at 0.5, 1.0 and 2 C-rate. The capacity retention of without and with collapsed NCM was 55.8% and 27.3% after 200 cycles at 1 C-rate, respectively.

Improving the electrochemical performance of the LiNi0.5Mn1.5O4spinel by polypyrrole coating as a cathode material for the lithium-ion battery

2015 ◽  
Vol 3 (1) ◽  
pp. 404-411 ◽  
Author(s):  
Xuan-Wen Gao ◽  
Yuan-Fu Deng ◽  
David Wexler ◽  
Guo-Hua Chen ◽  
Shu-Lei Chou ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Conductive Polypyrrole

Conductive polypyrrole (PPy)-coated LiNi0.5Mn1.5O4(LNMO) composites are applied as cathode materials in Li-ion batteries, and their electrochemical properties are explored at both room and elevated temperature.

Well-Designed Spherical Morphology Li1.2Mn0.54Ni0.13Co0.13O2 as Superior Cathode Materials for Lithium-Ion Batteries

2016 ◽  
Vol 852 ◽  
pp. 853-857
Author(s):  
Shao Meng Ma ◽  
Xian Hua Hou ◽  
Yan Ling Huang ◽  
Xiao Li Zou ◽  
She Jun Hu
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
Performance Test ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Constant Current ◽  
Precipitation Method ◽  
One Pot ◽  
Constant Current Density ◽  
High Discharge Capacity

Li-rich layered cathode materials with an average composition of Li1.2Mn0.54Ni0.13Co0.13O2 have been successfully synthesized via one-pot facile co-precipitation method. The spherical cathode material and the unconsolidated shape one are obtained by optimizing the experimental condition. The results of electrochemical performance test expose that the spherical cathode material exhibits more excellent cycle ability and rate performance than the unconsolidated one. The initial charge-discharge specific capacities of the spherical cathode are approximately 323.4 mAh g-1 and 266.4 mAh g-1, respectively, showing an initial coulombic efficiency of 82.4%. A high discharge capacity of 241.1 mAh g-1 is maintained with the capacity retention of 90.5% after 50 cycles at a constant current density of 50 mA g-1 (1 C=250 mAh g-1).

scholarly journals Ultrahigh Capacity Retention of Li2ZrO3-Coated Ni-rich LNCM811 Cathode Material through Covalent Interfacial Engineering

2021 ◽  
Author(s):  
Zhangxian Chen ◽  
Qiuge Zhang ◽  
Weijian Tang ◽  
Zhaoguo Wu ◽  
Juxuan Ding ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Capacity Retention ◽  
Interfacial Engineering ◽  
Electrochemical Capacity ◽  
Electrochemical Cycling

Nickel-rich LiNiCoMnO (LNCM811) is a promising lithium-ion battery cathode material, whereas the surface-sensitive issues (i.e., side reaction and oxygen loss) occurring on LNCM811 particles significantly degrade their electrochemical capacity retentions. A uniform LiZrO coating layer can effectively mitigate the problem by preventing these issues. Instead of the normally used weak hydrogen-bonding interaction, we present a covalent interfacial engineering for the uniform LiZrO coating on LiNiCoMnO materials. Results indicate that the strong covalent interactions between citric acid and NiCoMn(OH) precursor effectively promote the adsorption of ZrO coating species on NiCoMn(OH) precursor, which is eventually converted to uniform LiZrO coating layers of about 7 nm after thermal annealing. The uniform LiZrO coating endows LNCM811 cathode materials with an exceptionally high capacity retention of 98.7% after 300 cycles at 1 C. This work shows the great potential of covalent interfacial engineering for improving the electrochemical cycling capability of Ni-rich lithium-ion battery cathode materials.

The Effect of Si Doping or/and Ti Coating on the Electrochemical Properties of Ni-Rich NCA (LiNi0.8Co0.15Al0.05O2) Cathode Material for Lithium-Ion Batteries

2020 ◽  
Vol 12 (10) ◽  
pp. 1581-1585
Author(s):  
Tae-Hyun Ha ◽  
Jun-Seok Park ◽  
Gyu-Bong Cho ◽  
Hyo-Jun Ahn ◽  
Ki-Won Kim ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Physical Contact ◽  
Precipitation Method ◽  
Si Doping

LiNixCoyAlzO2 (NCA) is one of the most promising candidates of cathode material for lithium ion batteries because of its high capacity, energy density, and low cost. However, Ni-rich NCA cathode materials suffer from side reaction (formation of lithium carbonate and hydrogen fluoride attack) between electrolyte and surface of electrode and irreversible phase transition leading to capacity fading and thermal instability. These problems could be improved by coating and doping of transition metal elements. Si doping contributes to stabilization of the unstable R-3m structure, and Ti coating is capable of prohibiting the direct physical contact of electrode with electrolyte. In this work, LiNi0.8Co0.15Al0.05O2 (NCA) cathode materials coated or/and doped by Ti and Si elements were fabricated by co-precipitation method using the ball-milling. The crystal structure, morphology and electrochemical properties are investigated using X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), transmission electron microscopy (FE-TEM), and WBCS3000 (WonA tech Co., Ltd.). The EIS and charge/discharge results of Si doped and Ti coated NCA exhibited the lowest resistance value (147.19 Ω) and capacity retentions of 88% after 100 cycles at 0.5 C.

An Effective Method to Reduce Residual Lithium on LiNi0.8Co0.1Mn0.1O2 Cathode Material Using a Reducing Agent

2021 ◽  
Vol 21 (3) ◽  
pp. 2019-2023
Author(s):  
Ji-Woong Shin ◽  
Seon-Jin Lee ◽  
Sang-Yong Oh ◽  
Yun-Chae Nam ◽  
Jong-Tae Son
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Reducing Agent ◽  
Cycle Performance ◽  
Temperature Cycle ◽  
Material Surface

Among the various cathode materials used in LIBs (Lithium ion batteries), nickel rich cathode materials have attracted an increasing amount of interest due to their high capacity, relatively low cost, and low toxicity when compared to LiCoO2. However, these materials always contain a large amount of residual lithium compounds such as LiOH and Li2CO3. The presence of lithium residues is undesirable because the oxidation of these compounds results in the formation of Li2O and CO2 gas at higher voltages, which lowers the coulombic efficiency between the charge and discharge capacities during cycling. In this study, using LiNi0.8Co0.1Mn0.1O2 as a starting material, a surface-modified cathode material was obtained by using reducing agent. The reducing agent not only plays the role of reducing the oxide conversion energy but also suppresses the side reaction with the electrolyte due to the surface modification. Residual lithium present on the cathode material surface was reduced from 11,702 ppm to 8,658 ppm, resulting in improved high temperature cycle performance and impedance characteristics.

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