scholarly journals P2- a2=3Mn2=3M1=3O2 (M = Fe, Co, Ni) cathode materials in localized high concentration electrolyte for the long-cycling performance of sodium-ion batteries

2021 ◽  
Vol 24 (2) ◽  
pp. first
Author(s):  
Kha Minh Le ◽  
Huynh Thi Kim Tuyen ◽  
Thanh Duy Vo ◽  
Hoang Van Nguyen ◽  
Nhan Thanh Tran ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Rietveld Method ◽  
Synergistic Effects ◽  
Cycling Performance ◽  
Molar Ratio ◽  
Potential Range ◽  
High Concentration ◽  
Dendrite Formation

Introduction: Localized high concentration electrolytes (LHCE) have been intensively studied due to their unique properties, especially in suppressing the Na dendrite formation and long-term cycling. Therefore, the low electrochemical performance of the P2-type cathode can be overcome by using LHCE. Methods: P2-type sodium layered oxides Na2=3Mn2=3M1=3O2 (M = Fe, Co, Ni) cathode materials were synthesized via a simple co-precipitation following a supported solid-state reaction. XRD and Rietveld method analyzed the phase composition and lattice parameters. SEM images observed the morphology of materials. The half-cell of three cathode were performed in LHCE consisting of 2.1 M sodium bis(fluorosulfonyl)imide (NaFSI) dissolved in 1,2-dimethoxyethane (DME) and bis(2,2,2-trifluoroethyl) ether (BTFE) (solvent molar ratio 1:2). The galvanostatic charge-discharge, striping-plating, and linear sweep voltage tests were carried out to investigate the electrochemical behaviors. Results: As-prepared electrode materials exhibited discharge capacities of 94.5, 147.1, and 142.9 mAh/g at C/10 in the potential range of 1.5-4.2 V for Na2=3Mn2=3Fe1=3O2 (MFO), Na2=3Mn2=3Co1=3O2 (MCO) and Na2=3Mn2=3Ni1=3O2 (MNO), respectively. Interestingly, the MNO cathode material has a superior cycling performance with 86.5% capacity retention after 100 cycles than MCO and MFO. Conclusion: Such superior electrochemical performance of synthesized MNO could be ascribed to the combined synergistic effects between the nickel partially substituted MNO cathode structure and using LHCE 2.1 M NaFSI/DME-BTFE (1:2). Nickel substituted MNO cathode exhibited the enhancement of discharge capacity and the long cycling stability in LHCE due to the mitigation of dendrite formation on sodium metal anode.

Rational Design of Quasi Zero-Strain NCM Cathode Materials for Minimizing Volume Change Effects in All-Solid-State Batteries

2019 ◽  
Author(s):  
Florian Strauss ◽  
Lea de Biasi ◽  
A-Young Kim ◽  
Jonas Hertle ◽  
Simon Schweidler ◽  
...  
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Cathode Materials ◽  
Rational Design ◽  
Electrode Materials ◽  
Cycling Performance ◽  
Mechanical Degradation ◽  
Volume Changes ◽  
Solid State Batteries ◽  
All Solid State Batteries

Measures to improve the cycling performance and stability of bulk-type all-solid-state batteries (SSBs) are currently being developed with the goal of substituting conventional Li-ion battery (LIB) technology. As known from liquid electrolyte based LIBs, layered oxide cathode materials undergo volume changes upon (de)lithiation, causing mechanical degradation due to particle fracture, among others. Unlike solid electrolytes, liquid electrolytes are somewhat capable of accommodating morphological changes. In SSBs, the rigidity of the materials used typically leads to adverse contact loss at the interfaces of cathode material and solid electrolyte during cycling. Hence, designing zero- or low-strain electrode materials for application in next-generation SSBs is desirable. In the present work, we report on novel Co-rich NCMs, NCM361 (60% Co) and NCM271 (70% Co), showing minor volume changes up to 4.5 V vs Li<sup>+</sup>/Li, as determined by <i>operando</i> X-ray diffraction and pressure measurements of LIB pouch and pelletized SSB cells, respectively. Both cathode materials exhibit good cycling performance when incorporated into SSB cells using argyrodite Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolyte, albeit their morphology and secondary particle size have not yet been optimized.

Rational Design of Quasi Zero-Strain NCM Cathode Materials for Minimizing Volume Change Effects in All-Solid-State Batteries

2019 ◽  
Author(s):  
Florian Strauss ◽  
Lea de Biasi ◽  
A-Young Kim ◽  
Jonas Hertle ◽  
Simon Schweidler ◽  
...  
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Cathode Materials ◽  
Rational Design ◽  
Electrode Materials ◽  
Cycling Performance ◽  
Mechanical Degradation ◽  
Volume Changes ◽  
Solid State Batteries ◽  
All Solid State Batteries

Measures to improve the cycling performance and stability of bulk-type all-solid-state batteries (SSBs) are currently being developed with the goal of substituting conventional Li-ion battery (LIB) technology. As known from liquid electrolyte based LIBs, layered oxide cathode materials undergo volume changes upon (de)lithiation, causing mechanical degradation due to particle fracture, among others. Unlike solid electrolytes, liquid electrolytes are somewhat capable of accommodating morphological changes. In SSBs, the rigidity of the materials used typically leads to adverse contact loss at the interfaces of cathode material and solid electrolyte during cycling. Hence, designing zero- or low-strain electrode materials for application in next-generation SSBs is desirable. In the present work, we report on novel Co-rich NCMs, NCM361 (60% Co) and NCM271 (70% Co), showing minor volume changes up to 4.5 V vs Li<sup>+</sup>/Li, as determined by <i>operando</i> X-ray diffraction and pressure measurements of LIB pouch and pelletized SSB cells, respectively. Both cathode materials exhibit good cycling performance when incorporated into SSB cells using argyrodite Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolyte, albeit their morphology and secondary particle size have not yet been optimized.

Synthesis of LiFePO4/C Composite Cathode Materials by Solid State Method Using Mixed Iron Sources

2013 ◽  
Vol 734-737 ◽  
pp. 2541-2544
Author(s):  
Wei Wang ◽  
Zheng Zhang ◽  
Dao Wushuang Shi ◽  
Xing Quan Liu
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Molar Ratio ◽  
Electrochemical Performances ◽  
Solid State Method ◽  
State Reduction ◽  
Solid State Reduction

The olivine LiFePO4/C composite cathode materials for lithium-ion batteries were synthesized by solid state reduction method using mixed iron sources. The effects of different temperatures on the electrochemical performance of as-synthesized cathode materials were investigated and analyzed. The crystal structures and the electrochemical performances were characterized by SEM, galvanostatical charge-discharge testing and AC-impedance, respectively. The results demonstrated that the LiFePO4/C composite cathode material synthesized at 710°C and with 1/2(FeC2O4·2H2O/Fe2O3) molar ratio of mixed iron sources has the better electrochemical performance, it has a discharge capacity of 126.1mAh/g at 0.2C and the capacity is kept at 113.8mAh/g after 20 cycles.

A multi-level structure bio-carbon composite with polyaniline for high performance supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12230-12236 ◽  
Author(s):  
Guofu Ma ◽  
Haiping Wang ◽  
Kanjun Sun ◽  
Hui Peng ◽  
Yajuan Wu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Electrode Materials ◽  
Synergistic Effects ◽  
Level Structure ◽  
Carbon Composite ◽  
Multi Level

The electrochemical performance of electrode materials can be enhanced by the synergistic effects of polyaniline and multi-level structured bio-carbon.

scholarly journals Research Progress of Cathode Materials for Lithium-ion Batteries

2021 ◽  
Vol 233 ◽  
pp. 01020
Author(s):  
Kaijia Lu ◽  
Chuanshan Zhao ◽  
Yifei Jiang
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Research Progress ◽  
Energy Storage Materials ◽  
Factors Affecting ◽  
New Energy ◽  
Oxide Spinel

Lithium-ion batteries have attracted widespread attention as new energy storage materials, and electrode materials, especially cathode materials, are the main factors affecting the electrochemical performance of lithium-ion batteries, and they also determine the cost of preparing lithium-ion batteries. In recent years, there have been a lot of researches on the selection and modification of cathode materials based on lithium-ion batteries to continuously optimize the electrochemical performance of lithium-ion batteries. This article introduces the research progress of cathode materials for lithium ion batteries, including three types of cathode materials (layer oxide, spinel oxide, polyanionic compound) and three modification methods (doping modification, surface coating modification, nano modification method), and prospects for the future development of lithium ion battery cathode materials.

scholarly journals Exploring the Role of Crystal Water in Potassium Manganese Hexacyanoferrate as a Cathode Material for Potassium-Ion Batteries

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 895
Author(s):  
Polina A. Morozova ◽  
Ivan A. Trussov ◽  
Dmitry P. Rupasov ◽  
Victoria A. Nikitina ◽  
Artem M. Abakumov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Chemical Composition ◽  
Electrochemical Performance ◽  
Structural Model ◽  
Electrode Materials ◽  
Iron Oxidation ◽  
Specific Capacity ◽  
Potassium Ion ◽  
Potential Range ◽  
Crystal Water

The Prussian Blue analogue K2−δMn[Fe(CN)6]1−ɣ∙nH2O is regarded as a key candidate for potassium-ion battery positive electrode materials due to its high specific capacity and redox potential, easy scalability, and low cost. However, various intrinsic defects, such as water in the crystal lattice, can drastically affect electrochemical performance. In this work, we varied the water content in K2−δMn[Fe(CN)6]1−ɣ∙nH2O by using a vacuum/air drying procedure and investigated its effect on the crystal structure, chemical composition and electrochemical properties. The crystal structure of K2−δMn[Fe(CN)6]1−ɣ∙nH2O was, for the first time, Rietveld-refined, based on neutron powder diffraction data at 10 and 300 K, suggesting a new structural model with the Pc space group in accordance with Mössbauer spectroscopy. The chemical composition was characterized by thermogravimetric analysis combined with mass spectroscopy, scanning transmission electron microscopy microanalysis and infrared spectroscopy. Nanosized cathode materials delivered electrochemical specific capacities of 130–134 mAh g−1 at 30 mA g−1 (C/5) in the 2.5–4.5 V (vs. K+/K) potential range. Diffusion coefficients determined by potentiostatic intermittent titration in a three-electrode cell reached 10−13 cm2 s−1 after full potassium extraction. It was shown that drying triggers no significant changes in crystal structure, iron oxidation state or electrochemical performance, though the water level clearly decreased from the pristine to air- and vacuum-dried samples.

Long-cycle and high-rate electrochemical performance of expanded graphite cathode materials with two-stage aluminum storage mechanism

2021 ◽  
Author(s):  
chunyan yang ◽  
yunlong ma ◽  
xiaoqiong feng ◽  
hong ning ◽  
shiying zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Graphite Electrode ◽  
Expanded Graphite ◽  
High Rate ◽  
Two Stage ◽  
Graphite Cathode ◽  
Storage Mechanism ◽  
Long Cycle

Graphite materials are of increasing interest as alternative cathodes for Aluminum-graphite batteries (AGBs) owing to their low fabrication price and rich resource. The development and design of graphite electrode materials...

Synthesis and Electrochemical Performance of Li3V2(PO4)3 Cathode Materials by Microwave-Assisted Carbothermal Reduction Method

2010 ◽  
Vol 156-157 ◽  
pp. 1199-1202
Author(s):  
Bo Quan Jiang ◽  
Shu Fen Hu ◽  
Zhi Qiang Ye
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Carbothermal Reduction ◽  
Reduction Method ◽  
Heating Time ◽  
Lithium Vanadium Phosphate ◽  
Molar Ratio ◽  
Microwave Assisted ◽  
Carbothermal Reduction Method ◽  
Charge Discharge

The lithium vanadium phosphate (Li3V2(PO4)3) cathode materials were synthesized by microwave- assisted carbothermal reduction method. The effects of microwave heating time and Li/V molar ratio on the structure and electrochemical performance of the prepared samples were investigated. The results show that the perfect crystal growth and good electrochemical performance ( first charge / discharge specific capacity of 160.8 mAh•g-1/151.3 mAh•g-1 and discharge decay rate of 7.90% after 30 cycles ) of the Li3V2(PO4)3 were obtained under the optimal conditions of heating time 11 min and Li/V molar ratio 3.05:2.0. The voltage values appeared at the oxidation and reduction peaks of the cyclic voltammetry curves were proved to be basically consistent with those appeared at the charge / discharge curves. The lithium ion diffusion coefficient was determined to be 2.320 ×10-9 cm2•s-1 by electrochemical impedance spectroscopy and mathematical models derived from simulative equivalent circuit.

scholarly journals Nanostrucutured MnO2-TiN Nanotube Arrays for Advanced Supercapacitor Electrode Material

2021 ◽  
Author(s):  
Peng Ren ◽  
Chao Chen ◽  
Xiuchun Yang
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrode Material ◽  
Electrode Materials ◽  
Synergistic Effects ◽  
Electronic Conductivity ◽  
Retention Rates ◽  
Storage Device ◽  
Nanotube Arrays ◽  
Transfer Resistance

Abstract Supercapacitor is an emerging and essential energy storage device to supply energy for human activities. Optimizing electrode materials is necessary for the development of high-performance supercapacitors. Herein, we synthesize different nanostructured MnO2-TiN nanotube arrays electrode materials and discuss their electrochemical performance. The synergistic effects of TiN with high conductivity and MnO2 with high capacitance can extremely enhance the electrochemical performance of the electrode material. The specific capacitance of δ-MnO2 nanosheets-TiN nanotube arrays can reach to 689.88 F•g−1 with good magnification capacity and electron/ion transport properties. Its internal resistance and the charge transfer resistance are low as 1.183 Ω and 52.23 Ω, respectively, indicating the excellent electronic conductivity and electron diffusion. In terms of charging-discharging cycle stability, the specific capacitance retention rates are 97.2% and 82.4 % of initial capacitance after 100 and 500 cycles, respectively.

Poly(aniline-co-pyrrole)-coated Ni-doped manganese dioxide as electrode materials for supercapacitors

2020 ◽  
Vol 13 (02) ◽  
pp. 2051007
Author(s):  
Jie Dong ◽  
Qinghao Yang ◽  
Qiuli Zhao ◽  
Zhenzhong Hou ◽  
Yue Zhou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Manganese Dioxide ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Cycle Stability ◽  
Mass Ratio ◽  
Scan Rate ◽  
Poly Aniline ◽  
Inorganic And Organic

Electrode materials with a high specific capacitance, outstanding reversibility and excellent cycle stability are constantly pursued for supercapacitors. In this paper, we present an approach to improve the electrochemical performance by combining the advantages of both inorganic and organic. Ni-MnO2/PANi-co-PPy composites are synthesized, with the copolymer of aniline/pyrrole being coated on the surface of Ni-doped manganese dioxide nanospheres. The inorganic–organic composite enables a substantial increase in its specific capacitance and cycle stability. When the mass ratio of Ni-MnO2 to aniline and pyrrole mixed monomer is 1:5, the composite delivers high specific capacitance of 445.49[Formula: see text]F/g at a scan rate of 2[Formula: see text]mV/s and excellent cycle stability of 61.65% retention after 5000 cycles. The results indicate that the Ni-MnO2/PANi-co-PPy composites are promising electrode materials for future supercapacitors application.

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