Competing with other polyanionic cathode materials for potassium-ion batteries via fine structure design: new layered KVOPO4 with a tailored particle morphology

2019 ◽  
Vol 7 (25) ◽  
pp. 15244-15251 ◽  
Author(s):  
Jiaying Liao ◽  
Qiao Hu ◽  
Bo Che ◽  
Xiang Ding ◽  
Fei Chen ◽  
...  
Keyword(s):  
Fine Structure ◽  
Cathode Material ◽  
Cathode Materials ◽  
High Capacity ◽  
Particle Morphology ◽  
Structure Design ◽  
Potassium Ion

Layered KVOPO4 (L-KVOP) with a controllable morphology as a cathode material for potassium-ion batteries is proposed. The designed L-KVOP electrode displays a high average voltage (3.65 V) and high capacity (115 mA h g−1).

An open-framework iron fluoride and reduced graphene oxide nanocomposite as a high-capacity cathode material for Na-ion batteries

2015 ◽  
Vol 3 (19) ◽  
pp. 10258-10266 ◽  
Author(s):  
Ghulam Ali ◽  
Si Hyoung Oh ◽  
Se Young Kim ◽  
Ji Young Kim ◽  
Byung Won Cho ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cathode Material ◽  
Reduced Graphene Oxide ◽  
Cathode Materials ◽  
High Capacity ◽  
Good Stability ◽  
Iron Fluoride ◽  
Open Framework ◽  
Reduced Graphene

Cathode materials with high capacity and good stability for rechargeable Na-ion batteries (NIBs) are few in number.

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.

LiNi0.90Co0.07Mg0.03O2 cathode materials with Mg-concentration gradient for rechargeable lithium-ion batteries

2019 ◽  
Vol 7 (36) ◽  
pp. 20958-20964 ◽  
Author(s):  
Yudong Zhang ◽  
Hang Li ◽  
Junxiang Liu ◽  
Jicheng Zhang ◽  
Fangyi Cheng ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Concentration Gradient ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Gradient Structure ◽  
High Rate Capability

Nickel-rich LiNi0.90Co0.07Mg0.03O2 cathode material with concentration gradient structure exhibits superior high capacity, high-rate capability and cycling stability.

The Effect of Si Doping or/and Ti Coating on the Electrochemical Properties of Ni-Rich NCA (LiNi0.8Co0.15Al0.05O2) Cathode Material for Lithium-Ion Batteries

2020 ◽  
Vol 12 (10) ◽  
pp. 1581-1585
Author(s):  
Tae-Hyun Ha ◽  
Jun-Seok Park ◽  
Gyu-Bong Cho ◽  
Hyo-Jun Ahn ◽  
Ki-Won Kim ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Physical Contact ◽  
Precipitation Method ◽  
Si Doping

LiNixCoyAlzO2 (NCA) is one of the most promising candidates of cathode material for lithium ion batteries because of its high capacity, energy density, and low cost. However, Ni-rich NCA cathode materials suffer from side reaction (formation of lithium carbonate and hydrogen fluoride attack) between electrolyte and surface of electrode and irreversible phase transition leading to capacity fading and thermal instability. These problems could be improved by coating and doping of transition metal elements. Si doping contributes to stabilization of the unstable R-3m structure, and Ti coating is capable of prohibiting the direct physical contact of electrode with electrolyte. In this work, LiNi0.8Co0.15Al0.05O2 (NCA) cathode materials coated or/and doped by Ti and Si elements were fabricated by co-precipitation method using the ball-milling. The crystal structure, morphology and electrochemical properties are investigated using X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), transmission electron microscopy (FE-TEM), and WBCS3000 (WonA tech Co., Ltd.). The EIS and charge/discharge results of Si doped and Ti coated NCA exhibited the lowest resistance value (147.19 Ω) and capacity retentions of 88% after 100 cycles at 0.5 C.

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

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.

Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries

2017 ◽  
Vol 5 (43) ◽  
pp. 22465-22471 ◽  
Author(s):  
Shaokun Chong ◽  
Yuanzhen Chen ◽  
Yang Zheng ◽  
Qiang Tan ◽  
Chengyong Shu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Structural Stability ◽  
High Capacity ◽  
Potassium Ion ◽  
Electrochemical Reversibility ◽  
High Structural Stability ◽  
Cubic Structure ◽  
Solution Mechanism

KFeII[FeIII(CN)6] with a symmetric cubic structure exhibits exceptional electrochemical performance based on a solid solution mechanism, and its high structural stability and electrochemical reversibility.

Chelate-induced formation of Li2MnSiO4 nanorods as a high capacity cathode material for Li-ion batteries

2016 ◽  
Vol 4 (24) ◽  
pp. 9447-9454 ◽  
Author(s):  
Yi Pei ◽  
Qing Chen ◽  
Cheng-Yan Xu ◽  
Hui-Xin Wang ◽  
Hai-Tao Fang ◽  
...  
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
High Capacity ◽  
Chelating Agent ◽  
Cyclic Stability ◽  
Li Ion Batteries ◽  
Pure Phase ◽  
Carbon Coated ◽  
Subsequent Calcination ◽  
Li Ion

Pure phase carbon-coated Li2MnSiO4 nanorods with excellent cyclic stability as cathode materials for LIBs were prepared via a facile chelating agent-assisted hydrothermal method together with subsequent calcination.

O3-Type NaCrO2 as a Superior Cathode Material for Sodium/Potassium-Ion Batteries Ensured by High Structural Reversibility

2021 ◽  
Author(s):  
Jinji Liang ◽  
Liying Liu ◽  
Xiangsi Liu ◽  
Xiangcong Meng ◽  
Linyong Zeng ◽  
...  
Keyword(s):  
Cathode Material ◽  
Potassium Ion ◽  
Sodium Potassium
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