scholarly journals Review of Modified Nickel-Cobalt Lithium Aluminate Cathode Materials for Lithium-Ion Batteries

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Ding Wang ◽  
Weihong Liu ◽  
Xuhong Zhang ◽  
Yue Huang ◽  
Mingbiao Xu ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Cycle Performance ◽  
Future Research ◽  
Lithium Aluminate ◽  
Nickel Cobalt ◽  
Lithium Cobaltate

Ternary nickel-cobalt lithium aluminate LiNixCoyAl1‐x‐yO2 (NCA, x≥0.8) is an essential cathode material with many vital advantages, such as lower cost and higher specific capacity compared with lithium cobaltate and lithium iron phosphate materials. However, the noticeably irreversible capacity and reduced cycle performance of NCA cathode materials have restricted their further development. To solve these problems and further improve the electrochemical performance, numerous research studies on material modification have been conducted, achieving promising results in recent years. In this work, the progress of NCA cathode materials is examined from the aspects of surface coating and bulk doping. Furthermore, future research directions for NCA cathode materials are proposed.

Excess lithium storage in LiFePO4-Carbon interface by ball-milling

2016 ◽  
Vol 09 (05) ◽  
pp. 1650053 ◽  
Author(s):  
Hua Guo ◽  
Xiaohe Song ◽  
Jiaxin Zheng ◽  
Feng Pan
Keyword(s):  
Ball Milling ◽  
Lithium Iron Phosphate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Effective Capacity ◽  
Lithium Storage ◽  
Electrical Vehicle ◽  
Milling Method ◽  
Theoretical Specific Capacity

As one of the most popular cathode materials for high power lithium ion batteries (LIBs) of the electrical-vehicle (EV), lithium iron phosphate (LiFePO4 (LFP)) is limited to its relatively lower theoretical specific capacity of 170[Formula: see text]mAh g[Formula: see text]. To break the limits and further improve the capacity of LFP is promising but challenging. In this study, the ball-milling method is applied to the mixture of LFP and carbon, and the effective capacity larger than the theoretical one by 30[Formula: see text]mAh g[Formula: see text] is achieved. It is demonstrated that ball-milling leads to the LFP-Carbon interface to store the excess Li-ions.

scholarly journals An Overview of Lithium-Ion Battery Cathode Materials

2011 ◽  
Vol 1363 ◽  
Author(s):  
Yixu Wang ◽  
Hsiao-Ying Shadow Huang
Keyword(s):  
Energy Storage ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
High Energy ◽  
Rechargeable Batteries ◽  
Environmental Benefits ◽  
Energy Storage Devices

ABSTRACTThe need for the development and deployment of reliable and efficient energy storage devices, such as lithium-ion rechargeable batteries, is becoming increasingly important due to the scarcity of petroleum. In this work, we provide an overview of commercially available cathode materials for Li-ion rechargeable batteries and focus on characteristics that give rise to optimal energy storage systems for future transportation modes. The study shows that the development of lithium-iron-phosphate (LiFePO4) batteries promises an alternative to conventional lithiumion batteries, with their potential for high energy capacity and power density, improved safety, and reduced cost. This work contributes to the fundamental knowledge of lithium-ion battery cathode materials and helps with the design of better rechargeable batteries, and thus leads to economic and environmental benefits.

Effect of Doping Ions on Electrochemical Properties of LiFePO4 Cathode

2011 ◽  
Vol 197-198 ◽  
pp. 1135-1138 ◽  
Author(s):  
Yan Li Ruan
Keyword(s):  
Solid State ◽  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Solid State Reaction Method ◽  
Inert Atmosphere ◽  
Cycle Performance ◽  
Performance Measurements ◽  
Reaction Method ◽  
Large Current

Lithium iron phosphate (LiFePO4) cathode materials containing different low concentration ion dopants (Mg2+, Al3+, Zr4+, and Nb5+) were prepared by a solid-state reaction method in an inert atmosphere. The effects of the doping ions on the properties of as-synthesized cathode materials were investigated. XRD results indicate that the ion dopants do not affect the structure of the materials. The galvanostatically charge and discharge tests show that ion dopants can considerably improve the electrochemical performance of the materials, especially large current discharge behaviors. LiFePO4 samples doped with Nb5+have an initiate capacity of 146.8 mAh•g-1at 0.1C. Further cycle performance measurements reveal the sample doped with Nb5+shows the best cycleability. The results also verify that LiFePO4doped with ions of suited radius and higher valence shows better electrochemical characters.

scholarly journals Estimating Degradation Costs for Non-Cyclic Usage of Lithium-Ion Batteries

2020 ◽  
Vol 10 (15) ◽  
pp. 5330
Author(s):  
Tomás Cortés-Arcos ◽  
Rodolfo Dufo-López ◽  
José L. Bernal-Agustín
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Batteries ◽  
Lithium Iron Phosphate ◽  
Optimization Problems ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Deterministic Models ◽  
Nickel Cobalt ◽  
Degradation Models ◽  
Battery Degradation

Estimating the degradation costs of lithium-ion batteries is essential to the designs of many systems because batteries are increasingly used in diverse applications. In this study, cyclic and calendar degradation models of lithium batteries were considered in optimization problems with randomized non-cyclic batteries use. Such models offer realistic results. Electrical, thermal, and degradation models were applied for lithium nickel cobalt manganese oxide (NMC) and lithium iron phosphate (LFP) technologies. Three possible strategies were identified to estimate degradation costs based on cell models. All three strategies were evaluated via simulations and validated by comparing the results with those obtained by other authors. One strategy was discarded because it overestimates costs, while the other two strategies give good results, and are suitable for estimating battery degradation costs in optimization problems that require deterministic models.

scholarly journals Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3992
Author(s):  
Jinshan Mo ◽  
Dongmei Zhang ◽  
Mingzhe Sun ◽  
Lehao Liu ◽  
Weihao Hu ◽  
...  
Keyword(s):  
Polyethylene Oxide ◽  
Cathode Materials ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Rate Performance ◽  
High Electronic Conductivity

Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work, polyethylene oxide (PEO) with high ionic conductance and flexibility was utilized as a multifunctional binder to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode materials. Scanning electron microscopy showed that the addition of PEO can greatly improve the adhesion of the electrode components and simultaneously enhance the integrity of the electrode. Thus, the PEO-based electrode (20 wt% PEO in PEO/PVDF) shows a high electronic conductivity of 19.8 S/cm, which is around 15,000 times that of the pristine PVDF-based electrode. Moreover, the PEO-based electrode exhibits better cycling stability and rate performance, i.e., the capacity increases from 131.1 mAh/g to 147.3 mAh/g at 2 C with 20 wt% PEO addition. Electrochemical impedance measurements further indicate that the addition of the PEO binder can reduce the electrode resistance and protect the LiNi0.6Co0.2Mn0.2O2 cathode materials from the liquid electrolyte attack. This work offers a simple yet effective method to improve the cycling performance of the ternary cathode materials by adding an appropriate amount of PEO as a binder in the electrode fabrication process.

Cathode Materials Based on Lithium Iron Phosphate/PEDOT Composites for Lithium-Ion Batteries

2020 ◽  
Vol 56 (6) ◽  
pp. 648-656
Author(s):  
V. V. Ozerova ◽  
I. A. Stenina ◽  
A. A. Kuz’mina ◽  
T. L. Kulova ◽  
A. B. Yaroslavtsev
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Lithium Ion ◽  
Iron Phosphate

Y-F co-doping behavior of LiFePO4/C nanocomposites for high-rate lithium-ion batteries

2021 ◽  
Author(s):  
H. Q. Wang ◽  
Anjie Lai ◽  
Dequan Huang ◽  
Youqi Chu ◽  
Si-Jiang Hu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Carbon Coating ◽  
Lithium Iron Phosphate ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
High Rate ◽  
Co Doping ◽  
Doping Behavior ◽  
Ion Doping

Lithium iron phosphate (LFP) has become one of the current mainstream cathode materials due to its high safety and low price. Most methods (e.g. ion doping, carbon coating and particle...

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