Study of electrochemical properties and thermal stability of the high-voltage spinel cathode material for lithium-ion accumulators

Kazda, Tomáš; Vondrák, Jiřı́; Noto, Vito Di; Sedlařı́ková, Marie; Čudek, Pavel; Omelka, L.; Šafaříková, Lenka; Kašpárek, Vít

doi:10.1007/s10008-015-2772-4

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…Since the pioneering work of Goodenough's team in 1997 on LiFePO 4 , different lithium metal phosphate materials have attracted attention as potential electrode materials for LIBs. [ 5,6 ] This makes LVP wileyonlinelibrary.com to the structural stabilization and enhanced conductivity offered by Al 3+ doping. In order to overcome the limitations of olivine structures, attempts have been made to design lithium mixed transitional metal oxide electrodes that include more than one metal ion (LiNi 0.5 Mn 1.5 O 4 ).…”

Section: Introductionmentioning

confidence: 99%

“…The same approach has been attempted in LMPO 4 systems, by Pagot et al where working potential >4 V is obtained with an initial specific discharge capacity of 125 mAh g −1 . However in both studies, the complexities involved in fabricating these structures in bulk and cycling stability remain an issue . This makes LVP a promising candidate for high rate applications due to its higher Li + diffusion efficiency and intercalation potentials, resulting in improved electrochemical characteristics .…”

Section: Introductionmentioning

confidence: 99%

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Lyophilized 3D Lithium Vanadium Phosphate/Reduced Graphene Oxide Electrodes for Super Stable Lithium Ion Batteries

Rajagopalan

Zhang

Dou

2015

Advanced Energy Materials

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a promising candidate for high rate applications due to its higher Li + diffusion effi ciency and intercalation potentials, resulting in improved electrochemical characteristics. [7][8][9][10] Another attractive feature of LVP is its amphoteric nature, so that it can hold more Li + ions and hence perform as an anode material. [ 11 ] There are reports suggesting that the diffusion coeffi cients of lithium metal phosphates such as LVP (10 −9 -10 −10 cm 2 s −1 ) are about fi ve orders of magnitude higher than the reported values for LiFePO 4 (10 −14 -10 −16 cm 2 s −1 ). [ 12 ] In addition to this, the solid solution nature of LVP during the discharge process prevents a jump in the voltage/composition curve. [ 13 ] On the downside, however, like most polyanion systems, the slightly distorted and separated VO 6 octahedra minimize the electronic conductivity of the compound (2.4 × 10 −7 S cm −1 at room temperature), which brings down its performance. [ 8,14 ] Various approaches have been suggested to mitigate this problem, such as nanostructuring, coating with a thin fi lm of carbon or some other conducting material, doping with secondary cations, etc. [ 9,15,16 ] Nanostructuring of electrode materials has been considered especially favorable, as it reduces the Li + diffusion length and enhances reaction interfaces. For instance, studies using LVP nanostructures have shown specifi c capacity as high as 131 mAh g −1 when cycled in the voltage range between 3.0 and 4.3 V at a 1 C rate. [ 14 ] Although nanostructuring LVP has many advantages, its tendency to agglomerate during processing reduces the reaction interfaces of the electrode, with the electrolyte eventually affecting the electrochemical properties of the device. [ 17 ] Coating the active material with a thin layer of carbon can improve the electronic conductivity, and hence provide a short charge transport distance and reduce the interparticle resistance. [ 9 ] It is a prerequisite that these coatings are thin and porous, as otherwise, the double layer mechanism of carbon will dominate the redox reactions due to underutilization of the core LVP. [ 15 ] Also, it has been proved that cation doping can effectively improve the electronic conductivity of LVP. For instance, Co 2+ (doping = 0.15) in the V sites improved the structural stability of the Li 3 V 2− x Co x (PO 4 ) 3 composite system and caused minimal volume changes during the reversible Li + extraction/insertion, resulting in enhanced cycling performance and a 9% improvement in the specifi c capacity as compared to the pristine undoped sample. [ 18 ] The improvement in the cycling stability (≈10%) and capacity (≈16%) in the case of Al doped LVP as compared to undoped samples was mainly due 3D lithium vanadium phosphate/reduced graphene oxide porous structures are prepared using a facile lyophilization process. The 3D porous nature of these lyophilized electrodes along with their high surface area lead to high rate capability and specifi c capacity. A high specifi c discharge capacity of ≈192 mAh g −1 is o...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lyophilized 3D Lithium Vanadium Phosphate/Reduced Graphene Oxide Electrodes for Super Stable Lithium Ion Batteries

Rajagopalan

Zhang

Dou

2015

Advanced Energy Materials

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“…EPR spectroscopy is an emerging characterization technique, which is limitedly utilized in Li‐ion battery research field . Challenges in setting up of the electrochemical cell has hindered the usage of this technique, which is actually quite useful in characterizing the formation of radical oxygen species during cycling.…”

Section: Magnetic Resonance Techniquesmentioning

confidence: 99%

Advances in In Situ Techniques for Characterization of Failure Mechanisms of Li‐Ion Battery Anodes

Hapuarachchi

Sun

Chen

2018

Advanced Sustainable Systems

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Li‐ion rechargeable battery, the prevailing market leader for energy storage applications throughout the past few decades, needs to be improved greatly in terms of capacity, cycling performance, and safety to cater future generation energy requirements. The failure of electrode materials, which leads to early capacity decay and safety issues in existing Li‐ion batteries, however, is still a technical challenge and deserves further investigation. In this review, recent advances in how in situ characterization techniques can be adopted to understand material failure mechanisms in Li‐ion battery are highlighted with a focus on failure and degradation of negative electrode materials. The information presented in this article is believed to be beneficial to application of advanced in situ characterization techniques in the development of next‐generation battery systems with improved electrochemical properties and structural integrity.

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Electrochemical performance of Mo doped high voltage spinel cathode material for lithium-ion battery

Kazda

Vondrák

Visintín

et al. 2018

Journal of Energy Storage

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Study of electrochemical properties and thermal stability of the high-voltage spinel cathode material for lithium-ion accumulators

Cited by 7 publications

References 20 publications

Lyophilized 3D Lithium Vanadium Phosphate/Reduced Graphene Oxide Electrodes for Super Stable Lithium Ion Batteries

Lyophilized 3D Lithium Vanadium Phosphate/Reduced Graphene Oxide Electrodes for Super Stable Lithium Ion Batteries

Advances in In Situ Techniques for Characterization of Failure Mechanisms of Li‐Ion Battery Anodes

Electrochemical performance of Mo doped high voltage spinel cathode material for lithium-ion battery

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