Study on Modified High Voltage (5V) Spinel Lithium Manganate Used for Energy Storage Lithium Titanate Batteries

Solid electrolyte Li1.4Al0.4Ti1.6 (PO4)3 was used to coat high voltage (5V) spinel lithium manganate. The modified high voltage spinel lithium manganate was used as positive electrode and the lithium titanate as negative electrode. A type of 10Ah energy storage battery was assembled. Charge-discharge and cycle life tests of these batteries were carried out at different temperatures and rates. The results show that coating high voltage spinel lithium manganate improves the high temperature cycle performance of the lithium titanate batteries. The capacity retention ratio of the lithium titanate batteries with the coated high voltage lithium manganate as cathode material increases from 74.8% to 86.5% at 60°Cafter 2000 cycles compared to the lithium titanate batteries with the uncoated high voltage lithium manganite as cathode material. However, the cycle performance is not affected at-30 °C. The low temperature rate performance of lithium titanate batteries is improved by coating high voltage lithium manganate. When the discharge rate is 20 C at-30°C, 90.6% of the 1 C charge capacity at room temperature of the lithium titanate battery with the coated high voltage lithium manganate as cathode materialcan be delivered, while the lithium titanate battery with the un-coated high voltage lithium manganate as cathode material can only deliver 80.2% of the 1 C charge capacity at room temperature.

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Stabilizing the high-voltage cycle performance of LiNi0.8Co0.1Mn0.1O2 cathode material by Mg doping

Journal of Power Sources ◽

10.1016/j.jpowsour.2019.227017 ◽

2019 ◽

Vol 438 ◽

pp. 227017 ◽

Cited By ~ 14

Author(s):

Xiaolan Liu ◽

Shuo Wang ◽

Li Wang ◽

Ke Wang ◽

Xiaozhong Wu ◽

...

Keyword(s):

Cathode Material ◽

High Voltage ◽

Cycle Performance ◽

Mg Doping

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Low-Temperature Performance of the Li[Li0.2Co0.4Mn0.4]O2 Cathode Material Studied for Li-Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.3662 ◽

2011 ◽

Vol 347-353 ◽

pp. 3662-3665 ◽

Cited By ~ 1

Author(s):

Yu Hui Wang ◽

Zhe Li ◽

Kai Zhu ◽

Gang Li ◽

Ying Jin Wei ◽

...

Keyword(s):

Low Temperature ◽

Cathode Material ◽

Room Temperature ◽

Sol Gel ◽

Cycle Performance ◽

Li Ion Batteries ◽

X Ray Diffraction ◽

Capacity Retention ◽

X Ray ◽

Li Ion

The Li[Li0.2Co0.4Mn0.4]O2 cathode material was prepared by a sol-gel method. Combinative X-ray diffraction (XRD) studies showed that the material was a solid solution of LiCoO2 and Li2MnO3. The material showed a reversible discharge capacity of 155.0 mAhg−1 at -20 °C, which is smaller than that at room temperature (245.5 mAhg−1). However, the sample exhibited capacity retention of 96.3 % at -20 °C, only 74.2 % at 25 °C. The good electrochemical cycle performance at low temperature was due to the inexistence of Mn3+ in the material.

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

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.18899 ◽

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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Layered High-Entropy Oxide Structures for Reversible Energy Storage

10.26434/chemrxiv.11778390.v1 ◽

2020 ◽

Author(s):

Junbo Wang ◽

Yanyan Cui ◽

Qingsong Wang ◽

Kai Wang ◽

Xiaohui Wang ◽

...

Keyword(s):

Energy Storage ◽

Cathode Material ◽

Spray Pyrolysis ◽

Lattice Structure ◽

Oxide Materials ◽

High Entropy ◽

New Class ◽

Nebulized Spray Pyrolysis

Layered LixMO2 materials, a new class of high-entropy oxides, have been synthesized by nebulized spray pyrolysis. Specifically, the lattice structure of Li(Ni1/3Mn1/3Co1/3)O2 (NCM111) cathode material has been replicated successfully while increasing the number of cations in equimolar proportions, thereby allowing transition to high-entropy oxide materials.

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One-pot coating of LiCoPO4/C by a UiO-66 metal–organic framework

RSC Advances ◽

10.1039/d0ra05706a ◽

2020 ◽

Vol 10 (58) ◽

pp. 35206-35213

Author(s):

Abdelaziz M. Aboraia ◽

Viktor V. Shapovalov ◽

Alexnader A. Guda ◽

Vera V. Butova ◽

Alexander Soldatov

Keyword(s):

Cathode Material ◽

Electrochemical Properties ◽

High Voltage ◽

Metal Organic Framework ◽

One Pot ◽

Metal Organic ◽

Organic Framework

LiCoPO4 (LCP) is a promising high voltage cathode material but suffers from low conductivity and poor electrochemical properties.

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Research Progress toward Room Temperature Sodium Sulfur Batteries: A Review

Molecules ◽

10.3390/molecules26061535 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1535

Author(s):

Yanjie Wang ◽

Yingjie Zhang ◽

Hongyu Cheng ◽

Zhicong Ni ◽

Ying Wang ◽

...

Keyword(s):

Energy Storage ◽

Room Temperature ◽

High Energy ◽

Safety Performance ◽

High Energy Density ◽

Research Progress ◽

Storage Performance ◽

Sulfur Battery ◽

Sodium Sulfur Battery ◽

Sodium Sulfur

Lithium metal batteries have achieved large-scale application, but still have limitations such as poor safety performance and high cost, and limited lithium resources limit the production of lithium batteries. The construction of these devices is also hampered by limited lithium supplies. Therefore, it is particularly important to find alternative metals for lithium replacement. Sodium has the properties of rich in content, low cost and ability to provide high voltage, which makes it an ideal substitute for lithium. Sulfur-based materials have attributes of high energy density, high theoretical specific capacity and are easily oxidized. They may be used as cathodes matched with sodium anodes to form a sodium-sulfur battery. Traditional sodium-sulfur batteries are used at a temperature of about 300 °C. In order to solve problems associated with flammability, explosiveness and energy loss caused by high-temperature use conditions, most research is now focused on the development of room temperature sodium-sulfur batteries. Regardless of safety performance or energy storage performance, room temperature sodium-sulfur batteries have great potential as next-generation secondary batteries. This article summarizes the working principle and existing problems for room temperature sodium-sulfur battery, and summarizes the methods necessary to solve key scientific problems to improve the comprehensive energy storage performance of sodium-sulfur battery from four aspects: cathode, anode, electrolyte and separator.

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