Fluorine anion doped Na0.44MnO2 with layer-tunnel hybrid structure as advanced cathode for sodium ion batteries

Shi, Wenjing; Yan, Yong‐Wang; Chen, Chi; Ma, Xiaotao; Zhang, Ding; Xu, Shoudong; Chen, Liang; Wang, Xiaomin; Liu, Shibin

doi:10.1016/j.jpowsour.2019.04.038

Cited by 60 publications

(45 citation statements)

References 52 publications

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“…Besides, the tremendous electrostatic interaction between zinc ions and host materials usually leads to sluggish diffusion of zinc ions, limiting the development of ZIBs [19]. Fortunately, alkali metal ions of Na + , K + , and Li + , and crystal water could serve as pillars to stabilize the layered structure and improve the interlayer distance and, hence, benefit the diffusion of guest ions in electrode materials [34][35][36][37][38][39]. For example, Mai et al [40] demonstrated a Na 0.33 V 2 O 5 cathode, in which the sodium ions stabilized the layered structure and improved the electronic conductivity for high-performance ZIBs.…”

Section: Introductionmentioning

confidence: 99%

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

et al. 2020

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HIGHLIGHTS• A layered sodium-ion/crystal water co-intercalated Na 0.55 Mn 2 O 4 ·0.57H 2 O (NMOH) cathode is synthesized successfully with a selectively etching method for zinc-ion batteries.• A displacement/intercalation mechanism is confirmed in the Mn-based cathode for the first time.• The NMOH cathode delivers a competitive reversible capacity of 201.6 mA h g −1 at 500 mA g −1 after 400 cycles.ABSTRACT Mn-based rechargeable aqueous zinc-ion batteries (ZIBs) are highly promising because of their high operating voltages, attractive energy densities, and eco-friendliness. However, the electrochemical performances of Mn-based cathodes usually suffer from their serious structure transformation upon charge/discharge cycling.Herein, we report a layered sodium-ion/crystal water co-intercalated Birnessite cathode with the formula of Na 0.55 Mn 2 O 4 ·0.57H 2 O (NMOH) for high-performance aqueous ZIBs. A displacement/intercalation electrochemical mechanism was confirmed in the Mn-based cathode for the first time. Na + and crystal water enlarge the interlayer distance to enhance the insertion of Zn 2+ , and some sodium ions are replaced with Zn 2+ in the first cycle to further stabilize the layered structure for subsequent reversible Zn 2+ /H + insertion/extraction, resulting in exceptional specific capacities and satisfactory structural stabilities. Additionally, a pseudo-capacitance derived from the surface-adsorbed Na + also contributes to the electrochemical performances. The NMOH cathode not only delivers high reversible capacities of 389.8 and 87.1 mA h g −1 at current densities of 200 and 1500 mA g −1 , respectively, but also maintains a good long-cycling performance of 201.6 mA h g −1 at a high current density of 500 mA g −1 after 400 cycles, which makes the NMOH cathode competitive for practical applications.Zinc sulfate (ZnSO 4 ·H 2 O, 99.9%), sodium sulfate (Na 2 SO 4 , 99.9%), and manganese sulfate (MnSO 4 ·H 2 O, 99.9%) were purchased from Aladdin (China). Sodium silicate Nano-Micro Lett.

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Section: Introductionmentioning

confidence: 99%

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

et al. 2020

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“…Na 0.44 MnO 2 has a tunnel structure with a Pmc 2 1 space group and contains a 3D crystal structure composed of MnO 5 pyramids and MnO 6 octahedra (Figure b) . The open structure has large S tunnels and small tunnels, which favor Na + diffusion and accommodate the volume change during the (de)sodiation process …”

Section: Resultsmentioning

confidence: 99%

“…Figure c shows the corresponding Z re versus ω −1/2 plots. Because the σ (Warburg impedance coefficient) values of these cycles are close to each other, the sodium‐ion diffusion coefficients are close to each other . After the second cycle, the calculated sodium‐ion diffusion coefficient ( D Na ) is 1.95×10 −12 cm 2 s −1 .…”

Section: Resultsmentioning

confidence: 99%

“…[13] The open structure has large St unnels and small tunnels, whichf avor Na + diffusiona nd accommodate the volumechange during the (de)sodiation process. [27] LamellarN MO is composed of primary nanosheets, and small gaps can be observed between each nanosheet (Figure 2a). The gaps facilitate Na ion transfera nd can accommodate the lattice volumec hange of Na 0.44 MnO 2 .F igure 2b shows aT EM image, indicatingt hat lamellar NMO is composed of severaln anosheets.…”

Section: Resultsmentioning

confidence: 99%

“…Because the s (Warburg impedance coefficient) values of these cycles are close to each other,t he sodium-ion diffusion coefficients are close to each other. [27,29] After the second cycle, the calculated sodium-ion diffusion co- ChemSusChem 2020ChemSusChem , 13,1793ChemSusChem -1799 www.chemsuschem.org 2020 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim efficient (D Na )i s1 .95 10 À12 cm 2 s À1 .T his outstanding rate capability is attributed to the tunnels tructure of Na 0.44 MnO 2 and the large interspaces between each nanosheet in the lamellar structure. As the large-sized Na + reachesananosheet near the spacious interspace, Na ions easily diffuse into Na 2 Mn 3 O 7 owing to the close contactb etween Na 0.44 MnO 2 and Na 2 Mn 3 O 7 in the heterojunction structure and the rich 3D and 2D channels of Na 0.44 MnO 2 .…”

Section: Resultsmentioning

confidence: 99%

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A High‐Performance Primary Nanosheet Heterojunction Cathode Composed of Na_0.44MnO₂ Tunnels and Layered Na₂Mn₃O₇ for Na‐Ion Batteries

Peng

Wang

et al. 2020

ChemSusChem

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Owing to its large capacity and high average potential, the structure and reversible O‐redox compensation mechanism of Na2Mn3O7 have recently been analyzed. However, capacity fade and low coulombic efficiency over multiple cycles have also been found to be a problem, which result from oxygen evolution at high charge voltages. Herein, a Na0.44MnO2⋅Na2Mn3O7 heterojunction of primary nanosheets was prepared by a sol‐gel‐assisted high‐temperature sintering method. In the nanodomain regions, the close contact of Na0.44MnO2 not only supplies multidimensional channels to improve the rate performance of the composite, but also plays the role of pillars for enhancing the cycling stability and coulombic efficiency; this is accomplished by suppressing oxygen evolution, which is confirmed by high‐resolution (HR)TEM, cyclic voltammetry, and charge/discharge curves. As the cathode of a Na‐ion battery, at 200 mA g−1 after 100 cycles, the Na0.44MnO2⋅Na2Mn3O7 heterojunction retains an 88 % capacity and the coulombic efficiency approaches 100 % during the cycles. At 1000 mA g−1, the Na0.44MnO2⋅Na2Mn3O7 heterojunction has a discharge capacity of 72 mAh g−1. In addition, the average potential is as high as 2.7 V in the range 1.5–4.6 V. The above good performances indicate that heterojunctions are an effective strategy for addressing oxygen evolution by disturbing the long‐range order distribution of manganese vacancies in the Mn‐O layer.

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Layered Oxide Cathodes Promoted by Structure Modulation Technology for Sodium‐Ion Batteries

Xiao

Abbasi

Zhu

et al. 2020

Adv Funct Materials

152

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Considering the ever‐growing climatic degeneration, sustainable and renewable energy sources are needed to be effectively integrated into the grid through large‐scale electrochemical energy storage and conversion (EESC) technologies. With regard to their competent benefit in cost and sustainable supply of resource, room‐temperature sodium‐ion batteries (SIBs) have shown great promise in EESC, triumphing over other battery systems on the market. As one of the most fascinating cathode materials due to the simple synthesis process, large specific capacity, and high ionic conductivity, Na‐based layered transition metal oxide cathodes commonly suffer from the sluggish kinetics, multiphase evolution, poor air stability, and insufficient comprehensive performance, restricting their commercialization application. Here, this review summarizes the recent advances in layered oxide cathode materials for SIBs through different optimal structure modulation technologies, with an emphasis placed on strategies to boost Na+ kinetics and reduce the irreversible phase transition as well as enhance the store stability. Meanwhile, a thorough and in‐depth systematical investigation of the structure–function–property relationship is also discussed, and the challenges as well as opportunities for practical application electrode materials are sketched. The insights brought forward in this review can be considered as a guide for SIBs in next‐generation EESC.

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Fluorine anion doped Na0.44MnO2 with layer-tunnel hybrid structure as advanced cathode for sodium ion batteries

Cited by 60 publications

References 52 publications

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

A High‐Performance Primary Nanosheet Heterojunction Cathode Composed of Na_0.44MnO₂ Tunnels and Layered Na₂Mn₃O₇ for Na‐Ion Batteries

Layered Oxide Cathodes Promoted by Structure Modulation Technology for Sodium‐Ion Batteries

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Fluorine anion doped Na0.44MnO2 with layer-tunnel hybrid structure as advanced cathode for sodium ion batteries

Cited by 60 publications

References 52 publications

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

A High‐Performance Primary Nanosheet Heterojunction Cathode Composed of Na0.44MnO2 Tunnels and Layered Na2Mn3O7 for Na‐Ion Batteries

Layered Oxide Cathodes Promoted by Structure Modulation Technology for Sodium‐Ion Batteries

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A High‐Performance Primary Nanosheet Heterojunction Cathode Composed of Na_0.44MnO₂ Tunnels and Layered Na₂Mn₃O₇ for Na‐Ion Batteries