scholarly journals Boron-doped sodium layered oxide for reversible oxygen redox reaction in Na-ion battery cathodes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yu-Jie Guo ◽  
Peng-Fei Wang ◽  
Yu-Bin Niu ◽  
Xu-Dong Zhang ◽  
Qinghao Li ◽  
...  
Keyword(s):  
Cathode Material ◽  
High Voltage ◽  
Cathode Materials ◽  
Redox Reaction ◽  
Structural Changes ◽  
Active Material ◽  
Charge Compensation ◽  
High Energy ◽  
Structural Instability ◽  
Capacity Retention

AbstractNa-ion cathode materials operating at high voltage with a stable cycling behavior are needed to develop future high-energy Na-ion cells. However, the irreversible oxygen redox reaction at the high-voltage region in sodium layered cathode materials generates structural instability and poor capacity retention upon cycling. Here, we report a doping strategy by incorporating light-weight boron into the cathode active material lattice to decrease the irreversible oxygen oxidation at high voltages (i.e., >4.0 V vs. Na+/Na). The presence of covalent B–O bonds and the negative charges of the oxygen atoms ensures a robust ligand framework for the NaLi1/9Ni2/9Fe2/9Mn4/9O2 cathode material while mitigating the excessive oxidation of oxygen for charge compensation and avoiding irreversible structural changes during cell operation. The B-doped cathode material promotes reversible transition metal redox reaction enabling a room-temperature capacity of 160.5 mAh g−1 at 25 mA g−1 and capacity retention of 82.8% after 200 cycles at 250 mA g−1. A 71.28 mAh single-coated lab-scale Na-ion pouch cell comprising a pre-sodiated hard carbon-based anode and B-doped cathode material is also reported as proof of concept.

Polydiphenylamine as a promising high-energy cathode material for dual-ion batteries

2020 ◽  
Author(s):  
Filipp Aleksandrovich Obrezkov ◽  
Alexander F. Shestakov ◽  
Sergey G. Vasil'ev ◽  
Keith Stevenson ◽  
Pavel Troshin
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
Metal Ion ◽  
Electronic Conductivity ◽  
Active Material ◽  
High Energy ◽  
The Poor

A serious drawback of organic cathode materials for metal-ion and dual-ion batteries is the poor electronic conductivity of cathode materials leading to relatively low loading of active material in the...

scholarly journals Reversible Dual Anionic-Redox Chemistry in NaCrSSe with Fast Charging Capability

2020 ◽  
Author(s):  
Ding-Ren Shi ◽  
Zulipiya Shadike ◽  
Tian Wang ◽  
Si-Yu Yang ◽  
He-Yi Xia ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Redox Reaction ◽  
High Capacity ◽  
Charge Compensation ◽  
Redox Chemistry ◽  
High Energy ◽  
High Rate ◽  
Structure Evolution ◽  
Fast Kinetics ◽  
Almost All

Abstract Utilizing the anionic redox reaction opens new approaches for the development of new battery cathode materials with extra capacities. Although, it suffers from several obstacles such as voltage hysteresis and sluggish kinetics. In this paper, a new layered chalcogenide-based on dual anionic-redox reaction is reported. The newly designed layered NaCrSSe exhibits the capacity of almost all Na+ intercalation/deintercalation (137 mAh g-1 at 50 mA g-1), and a unique charge/discharge feature with a small polarization of 0.15 V and high energy efficiencies of ~92% in initial cycles. Furthermore, a superior high-rate charge capacity of 115.5mAh g-1 (83.7% retention) was achieved at 27.8 C (4000 mA g-1), which is impressive in all bulk materials for sodium-ion batteries. Systematic characterization studies on structure evolution and DFT calculation show the charge compensation of S and Se anions during cycling. These results will enrich the anion redox chemistry and provide valuable information for developing new anion redox based cathode materials with high capacity and fast kinetics.

Overlithiation of LiNi0.8Co0.2O2 for Increased Performance in Li-Ion Batteries

2014 ◽  
Vol 938 ◽  
pp. 253-256
Author(s):  
Hashlina Rusdi ◽  
Norlida Kamarulzaman ◽  
Rusdi Roshidah ◽  
Kelimah Elong ◽  
Abd Rahman Azilah
Keyword(s):  
Cathode Materials ◽  
Structural Instability ◽  
Cation Ordering ◽  
Capacity Fading ◽  
Capacity Retention ◽  
Battery Capacity ◽  
Li Ion ◽  
Battery Application ◽  
Charge Discharge ◽  
Better Than

Layered LiNi1-xCoxO2 is one of the promising cathode materials for Li-ion battery application. However, the Ni rich cathode materials exhibit low capacity and bad capacity retention. This is due to factors such as disorder and structural instability when Li is removed during charge-discharge. Overlithiation of cathode materials is expected to improve the cation ordering and structural stability. Good cation ordering will increase the battery capacity. During charge-discharge, the irreversible Li+ loss can be replaced to a certain extent by the interstitial Li+ ions in the lattice of the LixNi0.8Co0.2O2 material. This helps reduce capacity fading of the cathode materials. In this work the overlithiation of LiNi0.8Co0.2O2 is done by interstitially doping Li+ in the LiNi0.8Co0.2O2 materials producing Li1.05Ni0.8Co0.2O2 and Li1.1Ni0.8Co0.2O2. Results showthat the performance of the overlithiated LiNi0.8Co0.2O2 materials is better than pure LiNi0.8Co0.2O2.

Preparation and Characterization of High-Voltage Cathode Material LiNi0.5Mn1.5O4 for Lithium Ion Batteries

2019 ◽  
Vol 953 ◽  
pp. 121-126
Author(s):  
Zhe Chen ◽  
Quan Fang Chen ◽  
Sha Ne Zhang ◽  
Guo Dong Xu ◽  
Mao You Lin ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Synthesis Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Diffusion Path ◽  
High Energy ◽  
High Energy Density ◽  
Charge Discharge

High energy density and rechargeable lithium ion batteries are attracting widely interest in renewable energy fields. The preparation of the high performance materials for electrodes has been regarded as the most challenging and innovative aspect. By utilizing a facile combustion synthesis method, pure nanostructure LiNi0.5Mn1.5O4 cathode material for lithium ion batteries were successfully fabricated. The crystal phase of the samples were characterized by X-Ray Diffraction, and micro-morphology as well as electrochemistry properties were also evaluated using FE-SEM, electrochemical charge-discharge test. The result shows the fabricated LiNi0.5Mn1.5O4 cathode materials had outstanding crystallinity and near-spherical morphologies. That obtained LiNi0.5Mn1.5O4 samples delivered an initial discharge capacity of 137.2 mAhg-1 at the 0.1 C together with excellent cycling stability and rate capability as positive electrodes in a lithium cell. The superior electrochemical performance of the as-prepared samples are owing to nanostructure particles possessing the shorter diffusion path for Li+ transport, and the nanostructure lead to large contact area to effectively improve the charge/discharge properties and the rate property. It is demonstrated that the as-prepared nanostructure LiNi0.5Mn1.5O4 samples have potential as cathode materials of lithium-ion battery for future new energy vehicles.

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.

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.

Na3V2O2x(PO4)2F3−2x: a stable and high-voltage cathode material for aqueous sodium-ion batteries with high energy density

2015 ◽  
Vol 3 (12) ◽  
pp. 6271-6275 ◽  
Author(s):  
P. Ramesh Kumar ◽  
Young Hwa Jung ◽  
Chek Hai Lim ◽  
Do Kyung Kim
Keyword(s):  
Aqueous Solution ◽  
Energy Density ◽  
Cathode Material ◽  
High Voltage ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density ◽  
Sodium Ion Batteries ◽  
Aqueous Sodium ◽  
First Time

The reversible electrochemical activity of the Na3V2O2x(PO4)2F3−2x compound in an aqueous solution is reported for the first time.

Effects of Li2MnO3 coating on the high-voltage electrochemical performance and stability of Ni-rich layer cathode materials for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (27) ◽  
pp. 22625-22632 ◽  
Author(s):  
Honglong Zhang ◽  
Bing Li ◽  
Jing Wang ◽  
Bihe Wu ◽  
Tao Fu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
High Voltage ◽  
Cathode Materials ◽  
Coating Layer ◽  
Lithium Ion ◽  
Capacity Retention ◽  
Active Materials

The Li2MnO3-coated LiNi0.8Co0.1Mn0.1O2 shows a higher discharge capacity and a better capacity retention. The coating layer can protect the NCM active materials from CO2, suppressing the formation of Li2CO3 on the surface of NCM materials.

Oxygen activity and peroxide formation as charge compensation mechanisms in Li2MnO3

2017 ◽  
Vol 5 (29) ◽  
pp. 15183-15190 ◽  
Author(s):  
Anika Marusczyk ◽  
Jan-Michael Albina ◽  
Thomas Hammerschmidt ◽  
Ralf Drautz ◽  
Thomas Eckl ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Cathode Materials ◽  
Driving Force ◽  
Charge Compensation ◽  
High Energy ◽  
Oxygen Release ◽  
Peroxide Formation ◽  
Compensation Mechanisms

Over-lithiated transition metal oxides are currently the most promising high energy cathode materials. DFT calculations show that Li2MnO3 becomes increasingly unstable upon delithiation and experiences a driving force for either oxygen release from the surface or peroxide formation in the bulk. Both mechanisms are shown to be detrimental for the electrochemistry.

scholarly journals Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-ion Batteries

2019 ◽  
Author(s):  
Jun Liu ◽  
Qiming Liu ◽  
Huali Zhu ◽  
Feng Lin ◽  
Yan Ji ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Nickel Content ◽  
Lithium Ion ◽  
High Energy ◽  
Commercial Application ◽  
Layered Oxide ◽  
Oxide Cathode ◽  
Voltage Attenuation

Li-rich layered oxide cathode materials have become one of the most promising cathode materials for high-energy-density lithium-ion batteries owning to its high theoretical specific capacity, low cost, high operating voltage and environmental friendliness. Yet they suffer from severe capacity and voltage attenuation during prolong cycling, which blocks their commercial application. To clarify these causes, we synthesize 0.5Li2MnO3·0.5LiNi0.8Co0.1Mn0.1O2 (LL-811) with high-nickel-content cathode material by a solid-sate complexation method, and it manifests a lot slower capacity and voltage attenuation during prolong cycling compared to LL-111 and LL-523 cathode materials. The capacity retention at 1C after 100 cycles reaches to 87.5% and the voltage attenuation after 100 cycles is only 0.460 V. Combining X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM), it indicates that increasing the nickel content not only stabilizes the structure but also alleviates the attenuation of capacity and voltage. Therefore, it provides a new idea for designing of Li-rich layered oxide cathode materials that suppress voltage and capacity attenuation.

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