Self-optimizing weak solvation effects achieving faster low-temperature charge transfer kinetics for high-voltage Na3V2(PO4)2F3 cathode

Deng, Liang; Goh, Kokswee; Yu, Fu‐Da; Xia, Yang; Jiang, Yunshan; Wang, Ke; Han, Yi; Que, Lan‐Fang; Zhou, Jia; Wang, Zhenbo

doi:10.1016/j.ensm.2021.10.012

Cited by 85 publications

(54 citation statements)

References 43 publications

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“…SIBs usually encounter sluggish kinetics at low temperature (LT, below 0 °C), which could be affected by the charge-transfer process at the electrode, electrode/electrolyte interface, and mass transfer process in the electrolyte. [53][54][55][56] The low-temperature (LT) performance of the samples was tested at an extremely low temperature of −40 °C, revealing a high capacity of 426 mAh g -1 (0.05 A g -1 , the first cycle) for HCM-1300-ZBE, which is 85.1% of the capacity at room temperature (25 °C) (Figure 2e and Figure S19a,b, Supporting Information). This result is superior to the control samples, as well as the anode materials reported in literature (Figure 2f).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…This result is superior to the control samples, as well as the anode materials reported in literature (Figure 2f). [35,[56][57][58] Note that, we use ether (diglyme) electrolytes in this work, which are considered to show higher ionic conductivity at LT than ester type electrolytes, [35] for all the sample test. The significant differences among the LT performances indicate that the bulk structure of the electrode material also plays a critical role in enhancing the LT charge-storage ability.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

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Enabling Fast Na⁺ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

et al. 2022

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Efficient electrode materials, that combine high power and high energy, are the crucial requisites of sodium‐ion batteries (SIBs), which have unwrapped new possibilities in the areas of grid‐scale energy storage. Hard carbons (HCs) are considered as the leading candidate anode materials for SIBs, however, the primary challenge of slow charge‐transfer kinetics at the low potential region (<0.1 V) remains unresolved till date, and the underlying structure–performance correlation is under debate. Herein, ultrafast sodium storage in the whole‐voltage‐region (0.01–2 V), with the Na+ diffusion coefficient enhanced by 2 orders of magnitude (≈10–7 cm2 s–1) through rationally deploying the physical parameters of HCs using a ZnO‐assisted bulk etching strategy is reported. It is unveiled that the Na+ adsorption energy (Ea) and diffusion barrier (Eb) are in a positive and negative linear relationship with the carbon p‐band center, respectively, and balance of Ea and Eb is critical in enhancing the charge‐storage kinetics. The charge‐storage mechanism in HCs is evidenced through comprehensive in(ex) situ techniques. The as prepared HCs microspheres deliver a record high rate performance of 107 mAh g–1 @ 50 A g–1 and unprecedented electrochemical performance at extremely low temperature (426 mAh g–1 @ −40 °C).

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Section: Electrochemical Characterizationmentioning

confidence: 99%

Section: Electrochemical Characterizationmentioning

confidence: 99%

Enabling Fast Na⁺ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

et al. 2022

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Section: Sodium-ion Full Batteriesmentioning

confidence: 99%

Section: Sodium‐ion Full Batteriesmentioning

confidence: 99%

“…To further promote the application fields of SIBs, many works have adjusted the electrode–electrolyte interphase by optimizing the electrolytes to build full cells with unique characters. [ 186,189 ] For instance, to enhance the low‐temperature properties of Na 3 V 2 (PO 4 ) 2 F 3 || hard‐carbon full cell, Deng et al [ 185 ] introduced a low‐concentration electrolyte (0.3 M NaClO 4 in EC:PC = 1:1 v v −1 with 5% FEC) to construct a weakly solvating structure, which endowed the cell a lower activation energy barrier and facilitates the process of Na + desolvation. This full cell exhibited a high capacity of 108.5 mAh g −1 under −25 °C, of which energy density was 400 Wh kg −1 (based on the active material of cathode) (Figure 16b).…”

Section: Sodium‐ion Full Batteriesmentioning

confidence: 99%

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Hard‐Carbon Anodes for Sodium‐Ion Batteries: Recent Status and Challenging Perspectives

Shao

Jian

2022

Adv Energy and Sustain Res

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Sodium‐ion batteries (SIBs) hold great potential in the application of large‐scale energy storage. With the coming commercialization of SIBs, developing advanced anode of particularly hard carbon is becoming increasingly urgent yet challenging. Hard carbon still suffers from unclear sodium storage mechanism, unsatisfactory performance, and low initial Coulombic efficiency (ICE). Herein, the current state‐of‐the‐art advances in designing hard carbon anodes for high‐performance SIBs is summarized. First, the formation process of hard carbon and typical sodium storage models of “insertion–adsorption,” “adsorption–insertion,” “adsorption–pore filling,” and “adsorption–insertion–pore filling” are introduced systematically. Then, the key strategies including morphological engineering, heteroatom doping, and graphitic structure regulation are presented to enhance the capacity of hard carbon based on the in‐depth understanding of sodium storage behaviors. Subsequently, to promote the practical application of hard carbon, more attention is paid to the methods of ICE improvement, including electrolyte optimization, defect and surface engineering, and presodiation. Whereafter, hard‐carbon‐based SIBs and their intriguing applications are briefly sketched. Finally, future directions and challenging perspectives of hard‐carbon anodes for SIBs are proposed from the viewpoints of storage mechanisms, electrode structures, and presodiation techniques.

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Low Concentration Electrolyte Enabling Cryogenic Lithium–Sulfur Batteries

Chu

Wang

Liu

et al. 2022

Adv Funct Materials

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Lithium–sulfur chemistry suffers from poor conversion reaction kinetics, causing low‐capacity utilization of sulfur cathodes, particularly at cryogenic temperatures. Herein, based on low‐cost and abundant commercial sulfur particles directly, a low concentration electrolyte (LCE, 0.1 m) is employed to accelerate lithium–sulfur conversion reaction at low temperatures, demonstrating a broad applicability of this approach. Compared to conventional concentration (1.0 m) electrolytes, the proposed LCE successfully enhances conversion kinetics from Li2S4 to Li2S and restrains shuttle effects of polysulfides, resulting in higher capacity utilizations and more stable cycle performance at 0 and −20 °C. Further interfacial chemistry analyses on cycled electrodes reveal that a hybrid surface layer dominated by organic species as well as some favorable inorganics is constructed in the LCE, demonstrating smaller surface layer resistance. In situ EIS measurements at 0 °C and CV tests reveal main differences of electrode kinetics in 0.1 and 1 m electrolytes, further explaining the differences in working mechanism of two electrolytes. These findings elucidate the roles of LCEs on realizing faster kinetics for cryogenic lithium–sulfur batteries and provide a simple, low‐cost, and widely applicable pathway for achieving high‐performance lithium–sulfur batteries under extreme conditions.

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Self-optimizing weak solvation effects achieving faster low-temperature charge transfer kinetics for high-voltage Na3V2(PO4)2F3 cathode

Cited by 85 publications

References 43 publications

Enabling Fast Na⁺ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

Enabling Fast Na⁺ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

Hard‐Carbon Anodes for Sodium‐Ion Batteries: Recent Status and Challenging Perspectives

Low Concentration Electrolyte Enabling Cryogenic Lithium–Sulfur Batteries

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Self-optimizing weak solvation effects achieving faster low-temperature charge transfer kinetics for high-voltage Na3V2(PO4)2F3 cathode

Cited by 85 publications

References 43 publications

Enabling Fast Na+ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

Enabling Fast Na+ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

Hard‐Carbon Anodes for Sodium‐Ion Batteries: Recent Status and Challenging Perspectives

Low Concentration Electrolyte Enabling Cryogenic Lithium–Sulfur Batteries

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Enabling Fast Na⁺ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage

Enabling Fast Na⁺ Transfer Kinetics in the Whole‐Voltage‐Region of Hard‐Carbon Anodes for Ultrahigh‐Rate Sodium Storage