Phenoxazine as a high-voltage p-type redox center for organic battery cathode materials: small structural reorganization for faster charging and narrow operating voltage

2020 ◽  
Vol 13 (11) ◽  
pp. 4142-4156
Author(s):  
Kyunam Lee ◽  
Illia E. Serdiuk ◽  
Giyun Kwon ◽  
Dong Joo Min ◽  
Kisuk Kang ◽  
...  
Keyword(s):  
High Voltage ◽  
Cathode Materials ◽  
Rate Capability ◽  
Operating Voltage ◽  
Structural Reorganization ◽  
Redox Center ◽  
Voltage Plateau ◽  
P Type

Negligible structural reorganization of phenoxazine leads to superior rate capability and a narrow voltage plateau of a lithium–organic battery.

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...

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.

Zinc/Selenium Conversion Battery: A System Highly Compatible to both Organic and Aqueous Electrolytes

2021 ◽  
Author(s):  
Ze Chen ◽  
Funian Mo ◽  
Tairan Wang ◽  
Qi Yang ◽  
Zhaodong Huang ◽  
...  
Keyword(s):  
Cathode Materials ◽  
High Performance ◽  
Rate Capability ◽  
Zinc Ion ◽  
Aqueous Electrolytes ◽  
Organic Electrolytes ◽  
Voltage Plateau

Zinc ion batteries (ZIBs) typically work well in aqueous electrolytes. Most high-performance cathode materials of aqueous ZIBs acquire much-deteriorated capacity, voltage plateau and rate capability in organic electrolytes. It remains...

Investigation of various cobalt concentrations on LiV2O5 as cathode materials with tunable high rate capability and operating voltage in Li-ion batteries

2019 ◽  
Vol 489 ◽  
pp. 624-630 ◽  
Author(s):  
Marimuthu Priyadarshini ◽  
Kiran Preethi Kirubakaran ◽  
Chenrayan Senthil ◽  
Raghu Subash Chandrabose ◽  
Chang Woo Lee ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Rate Capability ◽  
High Rate ◽  
Operating Voltage ◽  
Li Ion Batteries ◽  
High Rate Capability ◽  
Li Ion

Excellent rate capability and cycling stability in Li+-conductive Li2SnO3-coated LiNi0.5Mn1.5O4 cathode materials for lithium-ion batteries

2018 ◽  
Vol 47 (20) ◽  
pp. 7020-7028 ◽  
Author(s):  
Jirong Mou ◽  
Yunlong Deng ◽  
Zhicui Song ◽  
Qiaoji Zheng ◽  
Kwok Ho Lam ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Power Density ◽  
High Voltage ◽  
Cathode Materials ◽  
Active Material ◽  
Rate Capability ◽  
Lithium Ion ◽  
Side Reactions ◽  
Capacity Fading

High-voltage LiNi0.5Mn1.5O4 is a promising cathode candidate for lithium-ion batteries (LIBs) due to its considerable energy density and power density, but the material generally undergoes serious capacity fading caused by side reactions between the active material and organic electrolyte.

Enhanced high-rate capability and high voltage cycleability of Li2TiO3-coated LiNi0.5Co0.2Mn0.3O2 cathode materials

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 88713-88718 ◽  
Author(s):  
Yan Mo ◽  
Bo Hou ◽  
De Li ◽  
Xiaobo Jia ◽  
Bokai Cao ◽  
...  
Keyword(s):  
High Voltage ◽  
Cathode Materials ◽  
Rate Capability ◽  
Cycling Stability ◽  
High Rate ◽  
High Rate Capability

For LiNi0.5Co0.2Mn0.3O2 materials, poor cycling stability is commonly observed under high-voltage operation (>4.3 V), particularly when accompanied by high-rate operation.

On the effect of the periodicity of diagnostic measurements on improving the reliability of high-voltage transformers

2019 ◽  
Vol 12 (1) ◽  
pp. 18-21
Author(s):  
V. A. Tikhonov
Keyword(s):  
Service Life ◽  
High Voltage ◽  
Chromatographic Analysis ◽  
Aluminum Industry ◽  
Early Stage ◽  
Diagnostic Methods ◽  
Transformer Oil ◽  
Operating Voltage ◽  
Dissolved Gases ◽  
The Aluminum Industry

The influence of the periodicity of diagnostic measurements on the operational state of high-voltage transformers is considered. Examples of defects of switching devices of converter transformers and methods for their detection are given. The rationale for the importance of recognition of defects at an early stage of their occurrence is given. The influence of the multiplicity of overvoltages on the service life of converter transformers in the aluminum industry is investigated. Based on the analysis of the service life of converter transformers of one of the powerful aluminum plants, where 83% of converter transformers have exhausted their standard service life, it is shown that in 40% of cases it would be possible to avoid their failures, with timely detection and elimination of emerging defects. Examples of defects of OLR (on-load regulators) of converter transformers and methods for their detection are given. The importance of recognition of defects at an early stage of their occurrence is substantiated. A method for chromatographic analysis of dissolved gases in transformer oil has been developed for the qualitative determination of defects and ways to eliminate them. Examples of diagnostics of converter transformers at operating voltage and working load are given, providing the best quality operational characteristics of converter transformers. The periodicity of diagnostic measurements and the reduction of defects and failures has been substantiated. The question of diagnosing the state of the converter transformer TDNP-40000/10 at an enterprise of the aluminum industry is investigated. Currently, diagnostic methods are being developed based on chromatographic analysis of dissolved gases in transformer oil. The presented method of evaluating the operating parameters of transformers allows for the safe operation of high-voltage transformers and enables to increase the reliability of the power supply scheme of aluminum industry plants.

scholarly journals High-Voltage “Single-Crystal” Cathode Materials for Lithium-Ion Batteries

2021 ◽  
Vol 35 (3) ◽  
pp. 1918-1932
Author(s):  
Yinzhong Wang ◽  
Errui Wang ◽  
Xu Zhang ◽  
Haijun Yu
Keyword(s):  
Single Crystal ◽  
Lithium Ion Batteries ◽  
High Voltage ◽  
Cathode Materials ◽  
Lithium Ion
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