All‐Climate Iron‐Based Sodium‐Ion Full Cell for Energy Storage

Cao, Yongjie; Cao, Xinle; Dong, Xiaoli; Zhang, Xiang; Xu, Jie; Wang, Nan; Yang, Yang; Wang, Congxiao; Liu, Yao; Xia, Yongyao

doi:10.1002/adfm.202102856

Cited by 33 publications

(15 citation statements)

References 41 publications

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“…7c, the hard carbon||P2-NaMNNb coin cell tested at −40 °C and 92 mA g −1 demonstrates capacity retention of approximately 89% after 100 cycles. These battery performances are well-positioned compared to the state-of-the-art literature of Na-ion cells 49,[63][64][65] , as shown in Supplementary Fig. 32, Supplementary Tables 7 and 8.…”

Section: Electrochemicalmentioning

confidence: 63%

Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries

et al. 2022

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The application of sodium-based batteries in grid-scale energy storage requires electrode materials that facilitate fast and stable charge storage at various temperatures. However, this goal is not entirely achievable in the case of P2-type layered transition-metal oxides because of the sluggish kinetics and unfavorable electrode|electrolyte interphase formation. To circumvent these issues, we propose a P2-type Na0.78Ni0.31Mn0.67Nb0.02O2 (P2-NaMNNb) cathode active material where the niobium doping enables reduction in the electronic band gap and ionic diffusion energy barrier while favoring the Na-ion mobility. Via physicochemical characterizations and theoretical calculations, we demonstrate that the niobium induces atomic scale surface reorganization, hindering metal dissolution from the cathode into the electrolyte. We also report the testing of the cathode material in coin cell configuration using Na metal or hard carbon as anode active materials and ether-based electrolyte solutions. Interestingly, the Na||P2-NaMNNb cell can be cycled up to 9.2 A g−1 (50 C), showing a discharge capacity of approximately 65 mAh g−1 at 25 °C. Furthermore, the Na||P2-NaMNNb cell can also be charged/discharged for 1800 cycles at 368 mA g−1 and −40 °C, demonstrating a capacity retention of approximately 76% and a final discharge capacity of approximately 70 mAh g−1.

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Section: Electrochemicalmentioning

confidence: 63%

Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries

et al. 2022

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“…Furthermore, it should be noted that the electrochemical performance of the Li-metal anode is highly dependent on the liquid electrolyte. With this in mind, recent improvements have been achieved with the optimization of electrolyte, including the fabrication of an advanced ether-based electrolyte, , a single-ion electrolyte, a concentrated electrolyte (HCE), and a localized high-concentration electrolyte (LHCE) . Besides, the surface treatment is also applied to improve the anode stability. , With these great efforts, the Li-metal anode might be a promising anode for high-energy batteries at low T .…”

Section: Electrode Modifications From Intercalation Chemistry To Alte...mentioning

confidence: 99%

Promoting Rechargeable Batteries Operated at Low Temperature

2021

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Metrics & MoreArticle Recommendations CONSPECTUS: Building rechargeable batteries for subzero temperature application is highly demanding for various specific applications including electric vehicles, grid energy storage, defense/space/subsea explorations, and so forth. Commercialized nonaqueous lithium ion batteries generally adapt to a temperature above −20 °C, which cannot well meet the requirements under colder conditions. Certain improvements have been achieved with nascent materials and electrolyte systems but have mainly been restrained to discharge and within a small rate at temperatures above −40 °C. Moreover, the recharging process of batteries based on the graphite anode still faces huge challenges from the simultaneous Li + intercalation and potential Li stripping at subzero temperatures. Revealing the temperature-dependent evolution of physicochemical and electrochemical properties will greatly benefit our understanding of the limiting factors at low temperature, which is of significant importance. Herein, we dissect the ion movements in the liquid electrolyte and solid electrode as well as their interphase to analyze the temperature effect on Li + -diffusion behavior during charging/ discharging processes. An electrolyte is the vital factor, and its ionic conductivity guarantees the smooth operation of the battery. However, it is the sluggish diffusion in the solid, especially the charge transfer at the solid electrolyte/electrode interfaces (SEI), that greatly limits the kinetics at low temperature. Many strategies have been put forward to tame electrolytes for low-temperature application. From a macroscopic point of view, multiple solvents are mixed to adjust the liquid temperature range and viscosity. With respect to the microscopic nature, research is focusing on the solvation structure by formulating the ratio of Li + ions to solvent molecules. The binding energy of the Li + −solvent complex is crucial for the desolvation process at low temperature, which is manipulated with fluorinated solvents or other weakly solvating electrolytes. On the basis of an optimized electrolyte, electrodes and their reaction mechanism need to be coupled carefully because different materials show totally different responses to temperature change. To avoid the sluggish desolvation process or slow diffusion in the bulk intercalation compounds, several kinds of materials are summarized for low temperature use. The intercalation pseudocapacitive behavior can compensate for the kinetics to some extent, and a metal anode is a good candidate for replacing a graphite anode to build high-energy-density batteries at subzero temperature. It is also a wise choice to develop nascent battery chemistry based on the co-intercalation of solvent molecules into electrodes. Furthermore, the interfacial resistance contributes a lot at low temperature, which need be modified to accelerate the Li + diffusion across the film. This will be linked to the electrolyte, exactly speaking, the solvation structure, to regulate the organic and ino...

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“…[60] The conspicuous peaks at 38.9°, 41.5°, 44.3°, and 46.1° were attributed to the characteristic reflections of Be (at 46.1°) and BeO (at 38.9, 41.5, and 44.3). [61] They came from the Be window that was used to conduct the operando XRD tests. Therefore, the ZnTe exhibited a conversion or alloying mechanism instead of an intercalation mechanism.…”

Section: Resultsmentioning

confidence: 99%

Anchoring Metal‐Organic Framework‐Derived ZnTe@C onto Elastic Ti₃C₂T_x MXene with 0D/2D Dual Confinement for Ultrastable Potassium‐Ion Storage

Sha

Cao

et al. 2022

Advanced Energy Materials

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Li-ion batteries (LIBs), the dominant electrochemical energy storage technology in the marketplace, are nevertheless not a good candidate for grid energy storage because of their high cost. In this sense, K-ion batteries (KIBs) have emerged as a reliable alternative to LIBs in grid energy storage because potassium is earth-abundant and cost-effective. [3][4][5][6][7] In addition, potassium has a similar standard electrode potential to lithium (K + /K vs Li + /Li: −2.93 vs −3.04 V against the standard hydrogen electrode, SHE), indicating that KIBs have high energy density. [6] Moreover, potassium has similar chemical properties to lithium, making it possible for the commercialized anode materials of LIBs, graphite, to be used directly for KIBs. Unfortunately, graphite only delivers a low theoretical capacity of 279 mAh g −1 for K + intercalation by forming KC 8 due to the sizeable K + radius (K + vs Li + : 1.38 vs 0.76 Å) and sluggish K + diffusion. [7,8] In this circumstance, developing advanced KIB anode materials with high capacity and favorable K + diffusion remains a significant challenge. Recently, transition metal dichalcogenides, such as oxides, [9] sulfides, [10][11][12][13][14][15] selenides, [16,17] and tellurides, [18][19][20][21][22] have been proposed for K + storage because they have high theoretical capacities. Compared to the oxide, sulfide, and selenide counterparts, transition metal tellurides (TMTs) exhibit several appealing advantages: higher conductivity for quick electron mobility, larger lattice spacings for enhanced K + diffusion, higher density for improved volumetric capacities, and metallic thermal conductivity for adequate joule heat transport during cycling. [23] These merits make TMTs an attractive and emerging candidate for K + storage. To date, several TMTs have been reported as KIB anode materials, including CoTe 2 , Bi 2 Te 3 , MoTe 2 , and WTe 2 . [18][19][20][21]24] However, two critical limitations hinder their practical implementations. The primary one is that they are not thermodynamically favorable for reacting with K + . Table S1 (Supporting Information) lists various metal−tellurium (MT) bonds and their dissociation energies. Most of the reported TMTs have large bond dissociation energies (>200 kJ mol −1 ), indicating that more energy is needed to break the MT bonds

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All‐Climate Iron‐Based Sodium‐Ion Full Cell for Energy Storage

Cited by 33 publications

References 41 publications

Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries

Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries

Promoting Rechargeable Batteries Operated at Low Temperature

Anchoring Metal‐Organic Framework‐Derived ZnTe@C onto Elastic Ti₃C₂T_x MXene with 0D/2D Dual Confinement for Ultrastable Potassium‐Ion Storage

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All‐Climate Iron‐Based Sodium‐Ion Full Cell for Energy Storage

Cited by 33 publications

References 41 publications

Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries

Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries

Promoting Rechargeable Batteries Operated at Low Temperature

Anchoring Metal‐Organic Framework‐Derived ZnTe@C onto Elastic Ti3C2Tx MXene with 0D/2D Dual Confinement for Ultrastable Potassium‐Ion Storage

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Anchoring Metal‐Organic Framework‐Derived ZnTe@C onto Elastic Ti₃C₂T_x MXene with 0D/2D Dual Confinement for Ultrastable Potassium‐Ion Storage