Pulse combustion reactor as a fast and scalable synthetic method for preparation of Li-ion cathode materials

Križan, Gregor; Križan, J.; Dominko, Robert; Gaberšček, Miran

doi:10.1016/j.jpowsour.2017.07.083

Cited by 11 publications

(10 citation statements)

References 33 publications

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“…Lithium ion batteries were assembled with a FGI@Li negative electrode and LiFePO 4 (LFP) cathode as the positive electrode separated by a glassy fiber separator soaked with a LP40 electrolyte. Composite cathodes were prepared by mixing active material LFP/C, carbon black, and polyvinylidene fluoride (PVdF) with a ratio of 90:5:5 wt.% 50 . The as-prepared composite mixture was dispersed in NMP and cast on Al foil.…”

Section: Methodsmentioning

confidence: 99%

Fluorinated reduced graphene oxide as a protective layer on the metallic lithium for application in the high energy batteries

Bobnar

Lozinšek

Kapun

et al. 2018

Sci Rep

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Metallic lithium is considered to be one of the most promising anode materials since it offers high volumetric and gravimetric energy densities when combined with high-voltage or high-capacity cathodes. However, the main impediment to the practical applications of metallic lithium is its unstable solid electrolyte interface (SEI), which results in constant lithium consumption for the formation of fresh SEI, together with lithium dendritic growth during electrochemical cycling. Here we present the electrochemical performance of a fluorinated reduced graphene oxide interlayer (FGI) on the metallic lithium surface, tested in lithium symmetrical cells and in combination with two different cathode materials. The FGI on the metallic lithium exhibit two roles, firstly it acts as a Li-ion conductive layer and electronic insulator and secondly, it effectively suppresses the formation of high surface area lithium (HSAL). An enhanced electrochemical performance of the full cell battery system with two different types of cathodes was shown in the carbonate or in the ether based electrolytes. The presented results indicate a potential application in future secondary Li-metal batteries.

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Section: Methodsmentioning

confidence: 99%

Fluorinated reduced graphene oxide as a protective layer on the metallic lithium for application in the high energy batteries

Bobnar

Lozinšek

Kapun

et al. 2018

Sci Rep

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“…There exist various synthesis methods that lead to the production of Ni-rich cathode materials, such as atmospheric plasma spray pyrolysis [28], pulse combustion [29], sputter deposition [30], and co-precipitation [31], to name a few. The latter is the most popular synthesis route, which firstly involves the formation of precursor in a continuous stirring tank reactor (CSTR) by co-precipitation.…”

Section: Lithium Residual Compounds From Synthesismentioning

confidence: 99%

Degradation and Aging Routes of Ni-Rich Cathode Based Li-Ion Batteries

et al. 2020

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Driven by the increasing plea for greener transportation and efficient integration of renewable energy sources, Ni-rich metal layered oxides, namely NMC, Li [Ni1−x−yCoyMnz] O2 (x + y ≤ 0.4), and NCA, Li [Ni1−x−yCoxAly] O2, cathode materials have garnered huge attention for the development of Next-Generation lithium-ion batteries (LIBs). The impetus behind such huge celebrity includes their higher capacity and cost effectiveness when compared to the-state-of-the-art LiCoO2 (LCO) and other low Ni content NMC versions. However, despite all the beneficial attributes, the large-scale deployment of Ni-rich NMC based LIBs poses a technical challenge due to less stability of the cathode/electrolyte interphase (CEI) and diverse degradation processes that are associated with electrolyte decomposition, transition metal cation dissolution, cation–mixing, oxygen release reaction etc. Here, the potential degradation routes, recent efforts and enabling strategies for mitigating the core challenges of Ni-rich NMC cathode materials are presented and assessed. In the end, the review shed light on the perspectives for the future research directions of Ni-rich cathode materials.

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“…According to the specifications, this LFP material has a specific surface area of 11 ± 2 m 2 g -1 , an agglomerate size of 3.0 ± 1.0 µm by the D50 criterion, and a native carbon content of 2.0 ± 0.5 wt.%. b) The second type of LFP material (LFP-pcrm) was prepared by a novel pulse combustion reactor method in a slightly reductive environment, as described in detail in our previous paper [11]. Briefly, the material was synthesized in a reactor setup consisting of a Helmholtz-type pulse combustor with a natural frequency of 280 Hz (at a temperature of around 1250 K) and a 4 m long stainless steel reactor pipe.…”

Section: Active Cathode Materialsmentioning

confidence: 99%

Revealing the Thermodynamic Background of the Memory Effect in Phase Separating Cathode Materials

Zelič

Mele

Pačnik

et al. 2019

SV-JME

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Phase separating Li-ion battery cell cathode materials feature a well-known phenomenon called the memory effect. It manifests itself as an abnormal change in working voltage being dependent on cell cycling history. It was only recently that plausible mechanistic reasoning of the memory effect in Li-ion batteries was proposed. However, the existing literature does still not consistently reveal a phenomenological background for the onset or absence of the memory effect. This paper provides strong experimental and theoretical evidence of the memory effect in phase separating Li-ion battery cathode materials. Specifically, the background leading to the onset or absence of the memory effect and the underlying causal chain of phenomena from the collective particle-by-particle intra-electrode phenomena to macroscopic voltage output of the battery are presented and discussed. The results, clearly reveal that no memory effect is observed and predicted for low cut off voltages, whereas the absence of the first rest in memory writing cycle does not result in the absence of the memory effect, as previously believed. In addition, excellent agreement between the simulated and measured results is shown which, on one hand confirms the credibility of the combined analyses and, on the other, provides clear causal relations from macroscopic experimental parameters to simulated phenomena on the particle level.

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Pulse combustion reactor as a fast and scalable synthetic method for preparation of Li-ion cathode materials

Cited by 11 publications

References 33 publications

Fluorinated reduced graphene oxide as a protective layer on the metallic lithium for application in the high energy batteries

Fluorinated reduced graphene oxide as a protective layer on the metallic lithium for application in the high energy batteries

Degradation and Aging Routes of Ni-Rich Cathode Based Li-Ion Batteries

Revealing the Thermodynamic Background of the Memory Effect in Phase Separating Cathode Materials

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