scholarly journals Self-Substitution and the Temperature Effects on the Electrochemical Performance in the High Voltage Cathode System LiMn1.5+xNi0.5−xO4 (x = 0.1)

2017 ◽  
Vol 14 (2) ◽  
Author(s):  
Yun Xu ◽  
Mingyang Zhao ◽  
Syed Khalid ◽  
Hongmei Luo ◽  
Kyle S. Brinkman
Keyword(s):  
Electrochemical Performance ◽  
High Voltage ◽  
Cathode Materials ◽  
Metal Ion ◽  
Structural Changes ◽  
Rate Capability ◽  
Performance Testing ◽  
Capacity Loss ◽  
Stable Performance ◽  
Li Ion

The high voltage cathode material, LiMn1.6Ni0.4O4, was prepared by a polymer-assisted method. The novelty of this work is the substitution of Ni with Mn, which already exists in the crystal structure instead of other isovalent metal ion dopants which would result in capacity loss. The electrochemical performance testing including stability and rate capability was evaluated. The temperature was found to impose a change on the valence and structure of the cathode materials. Specifically, manganese tends to be reduced at a high temperature of 800 °C and leads to structural changes. The manganese substituted LiMn1.5Ni0.5O4 (LMN) has proved to be a good candidate material for Li-ion battery cathodes displaying good rate capability and capacity retention. The cathode materials processed at 550 °C showed a stable performance with negligible capacity loss for 400 cycles.

Cu-ion induced self-polymerization of Cu phthalocyanine to prepare low-cost organic cathode materials for Li-ion batteries with ultra-high voltage and ultra-fast rate capability

2021 ◽  
Author(s):  
Haichang Zhang ◽  
Rui Zhang ◽  
Xingjiang Liu ◽  
Fei Ding ◽  
Chunsheng Shi ◽  
...  
Keyword(s):  
High Voltage ◽  
Cathode Materials ◽  
Fast Rate ◽  
Low Cost ◽  
Rate Capability ◽  
Li Ion Batteries ◽  
Practical Application ◽  
Battery Materials ◽  
Li Ion ◽  
Synthesis Routes

High cost, complex synthesis routes and low yield are pressing challenges hindering the practical application of organic battery materials. Herein, copper(II) phthalocyanine (CuPc), one of the most frequently used blue...

Improved High Voltage Performance of Li-ion Conducting Coated Ni-rich NMC Cathode Materials for Rechargeable Li Battery

2021 ◽  
Author(s):  
Himani Gupta ◽  
Shishir K. Singh ◽  
Nitin Srivastava ◽  
Dipika Meghnani ◽  
Rupesh K. Tiwari ◽  
...  
Keyword(s):  
High Voltage ◽  
Cathode Materials ◽  
Li Battery ◽  
Li Ion ◽  
Ion Conducting ◽  
Voltage Performance

An interfacial framework for breaking through the Li-ion transport barrier of Li-rich layered cathode materials

2017 ◽  
Vol 5 (46) ◽  
pp. 24292-24298 ◽  
Author(s):  
Yu Zheng ◽  
Lai Chen ◽  
Yuefeng Su ◽  
Jing Tan ◽  
Liying Bao ◽  
...  
Keyword(s):  
Ion Transport ◽  
Cathode Materials ◽  
Rate Capability ◽  
High Rate ◽  
Layered Crystal ◽  
High Rate Capability ◽  
Transport Barrier ◽  
Layered Cathode Materials ◽  
Li Ion

A spinel structured interfacial framework was derived within a host layered crystal, resulting in excellent high-rate capability of Li-rich materials.

Relating voltage and thermal safety in Li-ion battery cathodes: a high-throughput computational study

2015 ◽  
Vol 17 (8) ◽  
pp. 5942-5953 ◽  
Author(s):  
Anubhav Jain ◽  
Geoffroy Hautier ◽  
Shyue Ping Ong ◽  
Stephen Dacek ◽  
Gerbrand Ceder
Keyword(s):  
Dft Calculations ◽  
High Throughput ◽  
High Voltage ◽  
Cathode Materials ◽  
Inverse Relationship ◽  
Computational Study ◽  
Li Ion Battery ◽  
Thermal Safety ◽  
Li Ion

High voltage and high thermal safety are desirable characteristics of cathode materials, but difficult to achieve simultaneously DFT calculations on >1400 Li ion battery cathode materials indicate a complex inverse relationship between voltage and thermal safety.

Improved electrochemical performance of LiCoO2 electrodes for high-voltage operations by Ag thin film coating via magnetron sputtering

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3513-3518 ◽  
Author(s):  
Taner Zerrin ◽  
Mihri Ozkan ◽  
Cengiz S. Ozkan
Keyword(s):  
Thin Film ◽  
Magnetron Sputtering ◽  
Electrochemical Performance ◽  
High Voltage ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Interface Layer ◽  
Li Ion Batteries ◽  
Electrode Structure ◽  
Li Ion

ABSTRACTIncreasing the operation voltage of LiCoO2 (LCO) is a direct way to enhance the energy density of the Li-ion batteries. However, at high voltages, the cycling stability degrades very fast due to the irreversible changes in the electrode structure, and formation of an unstable solid electrolyte interface layer. In this work, Ag thin film was prepared on commercial LCO cathode by using magnetron sputtering technique. Ag coated electrode enabled an improved electrochemical performance with a better cycling capability. After 100 cycles, Ag coated LCO delivers a discharge capacity of 106.3 mAh g-1 within 3 - 4.5 V at C/5, which is increased by 45 % compared to that of the uncoated LCO. Coating the electrode surface with Ag thin film also delivered an improved Coulombic efficiency, which is believed to be an indication of suppressed parasitic reactions at the electrode interface. This work may lead to new methods on surface modifications of LCO and other cathode materials to achieve high-capacity Li-ion batteries for high-voltage operations.

Synthesis, microstructure, and electrochemical performance of Li-rich layered oxide cathode materials for Li-ion batteries

2019 ◽  
Vol 68 (2) ◽  
pp. 301-312 ◽  
Author(s):  
Е. V. Makhonina ◽  
L. S. Pechen ◽  
V. V. Volkov ◽  
А. М. Rumyantsev ◽  
Yu. М. Koshtyal ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Li Ion Batteries ◽  
Layered Oxide ◽  
Oxide Cathode ◽  
Li Ion
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