Electrostatic Self-Assembly Enabling Integrated Bulk and Interfacial Sodium Storage in 3D Titania-Graphene Hybrid

Xu, Gui‐Liang; Xiao, Lisong; Sheng, Tian; Liu, Jianzhao; Hu, Yixin; Ma, Tianyuan; Amine, Rachid; Xie, Yingying; Zhang, Xiaoyi; Liu, Yuzi; Ren, Yang; Sun, Chengjun; Heald, Steve M.; Kovačević, Jasmina; Sehlleier, Yee Hwa; Schulz, Christof; Mattis, Wenjuan Liu; Sun, Shi‐Gang; Wiggers, Hartmut; Chen, Zonghai; Amine, Khalil

doi:10.1021/acs.nanolett.7b04193

Cited by 41 publications

(33 citation statements)

References 56 publications

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“…The fitting results indicate that the b value of NaVO and KVO is closer to 0.5, while in the biphasic Na 0.5 K 0.5 VO, the b value manifests significant increase and become closer to 1.0. The b values of NaVO and KVO indicate typical battery behavior whose kinetics is dominated by diffusion process, while capacitance behavior of biphasic Na 0.5 K 0.5 VO suggests ion absorption reaction which is mainly surface capacitive‐controlled 44 . In addition, Na 0.5 K 0.5 VO indicates higher capacitive contribution ratio than the monophasic NaVO and KVO (Figure 3(B) and Figure S10(C), SI).…”

Section: Resultsmentioning

confidence: 97%

Interfacial adsorption–insertion mechanism induced by phase boundary toward better aqueous Zn‐ion battery

Shan

Wang

Liang

et al. 2021

InfoMat

209

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Biphasic and multiphasic compounds have been well clarified to achieve extraordinary electrochemical properties as advanced energy storage materials. Yet the role of phase boundaries in improving the performance is remained to be illustrated. Herein, we reported the biphasic vanadate, that is, Na1.2V3O8/K2V6O16·1.5H2O (designated as Na0.5K0.5VO), and detected the novel interfacial adsorption–insertion mechanism induced by phase boundaries. First‐principles calculations indicated that large amount of Zn2+ and H+ ions would be absorbed by the phase boundaries and most of them would insert into the host structure, which not only promote the specific capacity, but also effectively reduce diffusion energy barrier toward faster reaction kinetics. Driven by this advanced interfacial adsorption–insertion mechanism, the aqueous Zn/Na0.5K0.5VO is able to perform excellent rate capability as well as long‐term cycling performance. A stable capacity of 267 mA h g−1 after 800 cycles at 5 A g−1 can be achieved. The discovery of this mechanism is beneficial to understand the performance enhancement mechanism of biphasic and multiphasic compounds as well as pave pathway for the strategic design of high‐performance energy storage materials.

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Section: Resultsmentioning

confidence: 97%

Interfacial adsorption–insertion mechanism induced by phase boundary toward better aqueous Zn‐ion battery

Shan

Wang

Liang

et al. 2021

InfoMat

209

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“…Considering the significance of van der Waals (vdW) forces to the adsorption, we utilized the D3 dispersion vdW corrections with zero damping for describing the vdW interactions. 53 , 54 The Co cluster consisted of six Co atoms with a size of ~0.1 nm and the Co−Co bond distances was 2.24 Å. The Na 2 S 4 cluster was obtained after 10 ps of AIMD simulations at 350 K at first and the final structure was optimized.…”

Section: Methodsmentioning

confidence: 99%

Atomic cobalt as an efficient electrocatalyst in sulfur cathodes for superior room-temperature sodium-sulfur batteries

et al. 2018

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The low-cost room-temperature sodium-sulfur battery system is arousing extensive interest owing to its promise for large-scale applications. Although significant efforts have been made, resolving low sulfur reaction activity and severe polysulfide dissolution remains challenging. Here, a sulfur host comprised of atomic cobalt-decorated hollow carbon nanospheres is synthesized to enhance sulfur reactivity and to electrocatalytically reduce polysulfide into the final product, sodium sulfide. The constructed sulfur cathode delivers an initial reversible capacity of 1081 mA h g−1 with 64.7% sulfur utilization rate; significantly, the cell retained a high reversible capacity of 508 mA h g−1 at 100 mA g−1 after 600 cycles. An excellent rate capability is achieved with an average capacity of 220.3 mA h g−1 at the high current density of 5 A g−1. Moreover, the electrocatalytic effects of atomic cobalt are clearly evidenced by operando Raman spectroscopy, synchrotron X-ray diffraction, and density functional theory.

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“…According to the density functional theory (DFT) results, integration of graphene with TiO 2 can reduce the diffusion energy barrier, thus improving the sodium intercalation/deintercalation process. Later, through an electrostatic interaction–induced self‐assembly, Xu et al fabricated a 3D graphene/TiO 2 hybrid . The strong interaction between TiO 2 and graphene by van der Waals force not only facilitated bulk Na + intercalation but also enhanced the interfacial sodium storage.…”

Section: Multiscale Graphene‐based Materials For Sib Anodesmentioning

confidence: 99%

Multiscale Graphene‐Based Materials for Applications in Sodium Ion Batteries

Zhang

Xia

Liu

et al. 2019

Advanced Energy Materials

231

117

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renewable energy is imperative and of great significance for human beings. As the ideal alternatives, green energy sources including wind, solar energy, water, and tide power have been widely applied in modern industry successfully, but their intermittent and variability feature cannot support all-weather utilization. [3][4][5] Hence, developing high-efficiency energy storage and conversion technology is a powerful measure to solve the above problems. Currently, there has been great interest in developing/refining high-performance electrochemical energy storage (EES) devices such as batteries, supercapacitors, and fuel cells. Among various EES technologies, secondary rechargeable batteries (e.g., lead-acid batteries, Ni-Cd batteries, nickel-metal hydride batteries, and lithium/sodium ion batteries) have been extensively studied and play an important role in modern electronics and transportation. [6] Typically, since the successful commercialization of lithium ion batteries (LIBs) by Sony in 1991, we have entered into an era of LIBs due to their high working voltage, long cycles, low self-discharge, large energy density, and low maintenance. [7] After rapid development over the past decades, the fabrication techniques and performance of LIBs have made great progress and matured significantly to be used as main power source for sophisticated electronics, [8] hybrid electric vehicles, and pure electric vehicles. [1,9] However, the high Scrupulous design and smart hybridization of bespoke electrode materials are of great importance for the advancement of sodium ion batteries (SIBs). Graphene-based nanocomposites are regarded as one of the most promising electrode materials for SIBs due to the outstanding physicochemical properties of graphene and positive synergetic effects between graphene and the introduced active phase. In this review, the recent progress in graphene-based electrode materials for SIBs with an emphasis on the electrode design principle, different preparation methods, and mechanism, characterization, synergistic effects, and their detailed electrochemical performance is summarized. General design rules for fabrication of advanced SIB materials are also proposed. Additionally, the merits and drawbacks of different fabrication methods for graphene-based materials are briefly discussed and summarized. Furthermore, multiscale forms of graphene are evaluated to optimize electrochemical performance of SIBs, ranging from 0D graphene quantum dots, 2D vertical graphene and reduced graphene oxide sheets, to 3D graphene aerogel and graphene foam networks. To conclude, the challenges and future perspectives on the development of graphene-based materials for SIBs are also presented.

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Electrostatic Self-Assembly Enabling Integrated Bulk and Interfacial Sodium Storage in 3D Titania-Graphene Hybrid

Cited by 41 publications

References 56 publications

Interfacial adsorption–insertion mechanism induced by phase boundary toward better aqueous Zn‐ion battery

Interfacial adsorption–insertion mechanism induced by phase boundary toward better aqueous Zn‐ion battery

Atomic cobalt as an efficient electrocatalyst in sulfur cathodes for superior room-temperature sodium-sulfur batteries

Multiscale Graphene‐Based Materials for Applications in Sodium Ion Batteries

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