Insight into pre-sodiation in Na3V2(PO4)2F3/C @ hard carbon full cells for promoting the development of sodium-ion battery

Pi, Yuqiang; Gan, Zhiwei; Yan, Mengyu; Pei, Cunyuan; Yu, Hui; Ge, Yaowen; An, Qinyou; Mai, Liqiang

doi:10.1016/j.cej.2020.127565

Cited by 45 publications

(23 citation statements)

References 44 publications

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“…To ensure that the Na content of the full‐cell system is sufficient and to compensate for the capacity loss (21.5%) experienced in the first few cycles, the HC anode was pre‐sodiated prior to full‐cell assembly (see Experimental Section). [ 42 ] The specific capacity and energy density of the full cells were normalized by the cathode weight and total mass of the two electrodes (anode and cathode), respectively. As shown in Figure a, the NMFML/HC full cell demonstrates a discharge capacity of 162.8 mA h g −1 at 0.1 C, with an operating potential of ≈3.2 V, and has a relatively high energy density of 282.6 W h kg −1 .…”

Section: Resultsmentioning

confidence: 99%

A Novel Pentanary Metal Oxide Cathode with P2/O3 Biphasic Structure for High‐Performance Sodium‐Ion Batteries

Liang

Sun

2022

Adv Funct Materials

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The rapid capacity loss suffered by P2-type Mn-based layered oxide cathode materials, caused by deleterious high-voltage phase transformations and the dissolution of active materials, greatly limits their application in largescale sodium-ion battery installations. In this study, a novel P2/O3 biphasic cathode is developed using a multi-element (Fe, Mg, and Li) co-substitution strategy. The results of ex situ X-ray diffraction analyses and the absence of significant voltage plateaus in the charge-discharge profiles of cells featuring the proposed cathode indicate that deleterious phase transformations and concomitant lattice mismatch in the high-voltage region are effectively suppressed because of the topotactic intergrown structure of the resulting cathode. The optimized cathode also demonstrates improved structural stability and enhanced Na + diffusion kinetics, owing to the incorporation of stabilizing dopant pillars and suppressed metal-ion dissolution. Hence, the resulting Na half cell demonstrates a high initial capacity of 170.5 mA h g −1 at 0.1 C and excellent rate capability (106.6 mA h g −1 at 10 C). Furthermore, the resulting Na full cell, featuring a hard carbon anode, displays excellent cycling stability (72.1% capacity retention after 400 cycles), demonstrating its practical viability. This study presents the design and optimization of highperformance Mn-based cathodes.

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Section: Resultsmentioning

confidence: 99%

A Novel Pentanary Metal Oxide Cathode with P2/O3 Biphasic Structure for High‐Performance Sodium‐Ion Batteries

Liang

Sun

2022

Adv Funct Materials

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“…Although the process is rather cumbersome and complicated to carry out, most presodiation experiment is done by this method due to the fact of the scarcity of the proper presodiation reagents. As shown in Figure 2a, by controlling the different charging/discharging states of negative electrode (corresponding to different cut-off potentials), Pi et al [6] precisely obtained different presodiation degrees of sodium-ion full batteries, which were composed of carbon coated Na 3 V 2 (PO 4 ) 2 F 3 (denoted NVPF/C) as positive electrode and hard carbon (HC) as negative electrode. It is demonstrated that Na 3 V 2 (PO 4 ) 2 F 3 -HC (Discharging 100 %) cells exhibited the superior initial capacities of 98.2 mAh g À 1 at 10 C, an outstanding cycling life (71.8 % capacity retention after 600 cycles) compared with other experiment sets (Figure 2b), which should give credit to the Na + inserted into hard carbon from Na metal to compensate for the sodium loss.…”

Section: Electrochemical Methods (Ec)mentioning

confidence: 99%

mentioning

confidence: 99%

Presodiation Strategies for the Promotion of Sodium‐Based Energy Storage Systems

Song

Zou

Xiao

et al. 2021

Chemistry A European J

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Nowadays sodium-based energy storage systems (Na-based ESSs) have been widely researched as it possesses the possibility to replace traditional energy storage media to become next generation energy storage system. However, due to the irreversible loss of sodium ions in the first cycle, development of Na-based ESSs is limited. Presodiation, as a strategy of adding excess sodium ions to the system in advance, accomplishes the enhancement of electrochemical performance. In this minireview, different presodiation strategies applied in sodium-based energy storage systems will be summarized in detail, their functions and corresponding mechanisms will be discussed as well. Furthermore, the current novel application of presodiation method in other aspects of Na-based ESSs will be mentioned additionally. At last, in the view of present research status of presodiation, issues that can be mitigated are put forward and guidelines are given on how to deliberate in-depth presodiation technology in the future, dedicating to promote the further development of Na-based ESSs.

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“…NIFC was fabricated with NVPF/CNTs as a cathode and a hard carbon sphere anode (HCS). NVPF/ CNTs//HCS delivered 101.7 mAh g −1 at 0.5 C and 82.4 mAh g −1 at 5 C based on the mass of the cathode, with excellent retention of capacity 98.5% after 100 cycles at 0.5 C and 87.7% after 300 cycles at 5 C between the voltage range of 2 and 4.3 V. 184 Pi et al 127 reported the development of NIFC for practical applications. NVPF/C was synthesized using a spray-dried process and was used as a cathode, whereas hard carbon (HC) was used as an anode.…”

Section: Na 3 V 2 (Po 4 ) 2 F 3 (Nvpf)mentioning

confidence: 99%

Unfolding the structural features of NASICON materials for sodium‐ion full cells

et al. 2022

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Sodium-ion batteries (SIBs) are potential candidates for the replacement of lithium-ion batteries to meet the increasing demands of electrical storage systems due to the low cost and high abundance of sodium. Sodium superionic conductor (NASICON) structured materials have attracted enormous interest in recent years as electrode materials for safer and long-term performance of SIBs for electric energy storage smart grids. These materials have a threedimensional robust framework, high redox potential, thermal stability, and a fast Na + -ion diffusion mechanism. However, NASICON has low intrinsic electronic conductivity, which limits the electrochemical performance. This review describes the structural features of NASICONs to illustrate the ion storage mechanism and electrochemical performance of SIBs. Details of the NASICON crystal structure, the affiliated Na + -ion diffusion mechanism, morphology, and electrochemical performance of these materials in sodiumion half-cells as well as full cells are described. In addition to the application as electrode materials, the use of NASICONs as solid electrolytes is also elaborated in solid-state SIBs. Based on these aspects, we have provided more perspectives in terms of the commercialization of SIBs and strategies to overcome the limitations of NASICONs. Hence, this review is expected to provide the researchers of energy storage with an in-depth understanding of NASICON materials with the knowledge of structural features, which will provide a new avenue on the practicality of SIBs.

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Insight into pre-sodiation in Na3V2(PO4)2F3/C @ hard carbon full cells for promoting the development of sodium-ion battery

Cited by 45 publications

References 44 publications

A Novel Pentanary Metal Oxide Cathode with P2/O3 Biphasic Structure for High‐Performance Sodium‐Ion Batteries

A Novel Pentanary Metal Oxide Cathode with P2/O3 Biphasic Structure for High‐Performance Sodium‐Ion Batteries

Presodiation Strategies for the Promotion of Sodium‐Based Energy Storage Systems

Unfolding the structural features of NASICON materials for sodium‐ion full cells

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