Ni0.5TiOPO4 phosphate: Sodium insertion mechanism and electrochemical performance in sodium-ion batteries

Nassiri, Abdelhaq; Sabi, Noha; Sarapulova, Angelina; Dahbi, Mouad; Indris, Sylvio; Ehrenberg, Helmut; Saadoune, Ismae͏̈l

doi:10.1016/j.jpowsour.2019.02.038

Cited by 12 publications

(4 citation statements)

References 30 publications

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“…During the subsequent charge (Figure .b), only the diffraction lines of copper (collector) and lithium (counter electrode) are detected denoting that the crystal structure of Ni 3 (PO 4 ) 2 was not recovered upon the first cycle of discharge. This behavior was reported for many electrode materials . Furthermore, the second cycle of discharge/charge (Figure11.c and Figure .d) was analyzed as well and again only Cu and Li were observed confirming that this material undergoes irreversible amorphization.…”

Section: Resultssupporting

confidence: 77%

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

et al. 2020

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Nickel orthophosphate, Ni 3 (PO 4) 2 , was successfully synthesized using solid-state reaction at 900°C. The effect of the calcination temperature on the material purity was investigated at different temperatures (700-900°C). XRD analysis has shown that Ni 3 (PO 4) 2 crystallizes in a monoclinic system with P2 1 /a space group. The electrochemical performances of carbon-coated Ni 3 (PO 4) 2 were investigated for the first time versus Li + /Li and improved by the optimization of the cutoff voltage, the carbon-coating source, and the binder used. The best performance was delivered when using 0.01 V cutoff voltage, sucrose for C-coating, and carboxymethyl cellulose (CMC) binder. A reversible capacity of 249 mAh g À 1 and a capacity retention around 74-79 % after 90 cycles with a good coulombic efficiency of 98 % were obtained at C/5 current rate. In situ XRD measurements demonstrated the irreversible amorphization of the Ni 3 (PO 4) 2 crystal structure during the first discharge process, confirming that this phosphate exhibits a pure conversion mechanism.

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Section: Resultssupporting

confidence: 77%

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

et al. 2020

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“…These count e.g. β-MnO 2 [69,70], Li 2−x VO 3 [71], Li 2 MnO 3 [83], Ni 0.5 TiOPO 4 [84], and even nano-LiFePO 4 [85]. It is expected that many other materials could be added to this list.…”

Section: Irreversible Order-disorder Transitionsmentioning

confidence: 99%

Understanding disorder in oxide-based electrode materials for rechargeable batteries

Christensen¹,

Ravnsbæk²

2021

J. Phys. Energy

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Most rechargeable ion batteries employ transition metal oxides or phosphates as the positive electrode. To facilitate facile migration of the active ions (e.g. Li-or Na-ions), which to some extent governs the battery functionality, the electrodes are typically composed of crystalline materials, wherein the ions are intercalated via well-defined migration pathways. However, the electrode materials are rarely perfectly crystalline and will inherently contain some disorder, which may originate from the material preparation process or be induced by the ion-intercalation process. In some electrode materials the electrochemical performance is damaged by disorder, whereas in other cases good performance is retained even after severe order-disorder transitions. This agrees with the emergence of several ab origine disordered or amorphous oxide-based electrodes with promising electrochemical performance. The term disorder is spanning a wide variety of deviations from an ideal crystal periodicity, from classical defects such as point defects, vacancies, stacking faults etc., to the amorphous state. Disorder, beyond classical defects, in battery electrodes has previously been largely overlooked, and we know little about the nature of the disorder and how it affects the battery performance. Developments in methods for characterisation of local atomic structures now allow us to gain detailed structural knowledge on the disordered part of the electrodes and studies within this field are emerging. This perspective provides a summary of the state-of-the-art within this field and the tendencies we are beginning to see outlined. These will be illustrated through selected examples. Finally, we discuss the key research questions within the field of disorder in electrode materials and the perspectives of answering these.

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“…Furthermore, they also pointed out that the conversion‐type MoP owns higher capacity than intercalation‐type MoP due to the formation of Na 3 P. And the conversion‐type MoP has better cycling ability than alloying‐type phosphides owing to the existence of Mo element. Saadoune and co‐workers investigated Na + intercalation mechanism of Ni 0.5 TiOPO 4 phosphate using in situ synchrotron XRD in the transmission mode . The XRD pattern shows the evolution of low‐angle peaks of the monoclinic structure with space group P2 1 /c, exhibiting a conversion mechanism in which both Ni 2+ and Ti 4+ can be reduced.…”

Section: In Situ Xrd In Organic Electrolyte Systemsmentioning

confidence: 99%

Lab‐Scale In Situ X‐Ray Diffraction Technique for Different Battery Systems: Designs, Applications, and Perspectives

et al. 2019

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In order to meet the growing demands of electric vehicles and portable devices, the electrochemical performance of rechargeable batteries is required to be further optimized. Above all, it is of vital importance to understand the reaction mechanism of batteries under working states, which requires a direct observation of the complicated reaction process. Thus, in situ X‐ray diffraction (XRD) techniques have been employed in the charge and discharge process to realize real‐time monitoring and provide on‐site information of structural evolutions and phase transitions within electrode materials. In this review, a detailed summary of lab‐scale in situ X‐ray diffraction techniques is given and compared with in situ synchrotron XRD at the same time. First, four typical in situ reaction mechanisms are presented and their distinctive characteristics are introduced in detail. Second, the practical applications of in situ X‐ray diffraction in different battery systems are described with examples after extensive collections. In addition, the design of in situ cells and some noteworthy experimental details in actual testing are also mentioned. Finally, the further development direction of in situ X‐ray diffraction techniques is well prospected.

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Ni0.5TiOPO4 phosphate: Sodium insertion mechanism and electrochemical performance in sodium-ion batteries

Cited by 12 publications

References 30 publications

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

Understanding disorder in oxide-based electrode materials for rechargeable batteries

Lab‐Scale In Situ X‐Ray Diffraction Technique for Different Battery Systems: Designs, Applications, and Perspectives

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Ni0.5TiOPO4 phosphate: Sodium insertion mechanism and electrochemical performance in sodium-ion batteries

Cited by 12 publications

References 30 publications

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni3(PO4)2 as a Negative Electrode Material for Lithium‐Ion Batteries

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni3(PO4)2 as a Negative Electrode Material for Lithium‐Ion Batteries

Understanding disorder in oxide-based electrode materials for rechargeable batteries

Lab‐Scale In Situ X‐Ray Diffraction Technique for Different Battery Systems: Designs, Applications, and Perspectives

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Product

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Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries