Aligned Arrays of Na2Ti3O7 Nanobelts and Nanowires on Carbon Nanofiber as High‐Rate and Long‐Cycling Anodes for Sodium‐Ion Hybrid Capacitors

Wang, Huanwen; Xu, Dongming; Qiu, Ruyun; Tang, Shasha; Li, Shuai; Wang, Rui; He, Beibei; Gong, Yansheng; Fan, Hong Jin

doi:10.1002/sstr.202000073

Cited by 35 publications

(7 citation statements)

References 48 publications

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“…The Ragone plot (Figure 6e) visually presents the energy density and power density of the full-cell 2D-Bi//PB and some of the recently reported electrochemical energy storage devices. [36,[49][50][51][52][53][54] The full-cell 2D-Bi//PB shows the best electrochemical performance and superior power density. Typically, a superior energy density of 174 W h kg −1 can be obtained at 475 W kg −1 .…”

Section: Resultsmentioning

confidence: 99%

From 0D to 3D: Dimensional Control of Bismuth for Potassium Storage with Superb Kinetics and Cycling Stability

Cheng

Sun

et al. 2021

Advanced Energy Materials

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energy storage systems. [7][8][9] Thus, it is highly desired to develop new energy storage systems based on more abundant elements (such as sodium and potassium). [10,11] Compared with LIBs and sodium-ion batteries (NIBs), potassiumion batteries (KIBs) are one of the most ideal alternatives due to abundant potassium resources, lower redox potential of K + /K than that of Na + /Na (−2.93 V vs −2.71 V), similar "rocking-chair" reaction mechanism, and smaller Stokes radius in common electrolyte (K + (3.6 Å) < Na + (4.6 Å) < Li + (4.8 Å)). [12,13] Therefore, KIBs have lower production cost which has been considered as potential candidates for large-scale energy storage systems. [14] The biggest challenge for the development of KIBs is to find suitable electrode materials, because the repeated insertion/extraction of large K-ion radius would result in sluggish diffusion kinetics and electrode destruction. [15,16] Until now, many efforts have been devoted to pursue suitable electrode materials for highperformance K-ion storage. Among all kinds of anode materials, alloy-type anodes have been distinguished as promising candidates owing to its suitable voltage platform, high theoretical capacity, and high energy density. [17,18] Bismuth (Bi), an environment-friendly alloy anode material, has demonstrated a bright prospect in KIBs. [19][20][21] Based on the complete alloying reaction (Bi → K 3 Bi), it can deliver a high theoretical capacity of 385 mA h g −1 and a low reaction voltage of 0.34 V. However, huge volumetric change (506% for forming K 3 Bi) during charging/discharging and the derived electrode pulverization lead to poor cyclability and short cycle-life. [22] To address these issues, enormous efforts have been made to optimize the electrochemical properties of Bi-based anodes via appropriate structure design, such as hybridizing with carbonaceous matrix, [23] alloying with other metal, [24] and designing ultra-small nanoparticles. [25] Generally, the dimensionality of the reported Bi-based materials can be categorized into 0D, 1D, 2D, and 3D morphologies. [26] Different-dimensional structures show their unique performances based on surface and structural characteristics. Compared to 3D microsized materials, 0D-structured nanoparticles possess short diffusion length in all directions and large electrolyte-electrode contact area. Lu's group reported 0D Bi nanoparticles embedded in carbon matrix, delivering high capacity and steady long cycle (121 mA h g −1 after 700 cycles at 1 A g −1 ). [27] The 1D nanostructure exhibits Bismuth-based anode for potassium ion batteries (KIBs) has gained great attention due to its high volumetric specific capacity (3800 mA h mL −1 ). However, the Bi-based materials face a huge volumetric change upon the cycling process. Herein, the dimensionality manipulation in the Bi-anode is focused to realize superior electrochemical performance. The morphological evolution rules of 0D, 1D, 2D, and 3D Bi anodes upon the potassiation/depotassiation process are clarified. Thereinto, the 2D-Bi tran...

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Section: Resultsmentioning

confidence: 99%

From 0D to 3D: Dimensional Control of Bismuth for Potassium Storage with Superb Kinetics and Cycling Stability

Cheng

Sun

et al. 2021

Advanced Energy Materials

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“…In addition, TiO 2 and ZrO 2 were not detected in XRD. 16,17 High-angle annular dark-field (HAADF) imaging was used to detect the heavy atoms (Co, Mn, Ni, Ti, and Zr) as the contrast of the atom is proportional to its Z 1.7 (Z for the atomic number) in the HAADF mode of aberration-corrected scanning transmission electron microscopy (STEM). 18,19 Figure 2 illustrates that the bulk structure of the material is well defined and layer-like, but the surface structures are disordered.…”

Section: Resultsmentioning

confidence: 99%

Feasibility to Improve the Stability of Lithium-Rich Layered Oxides by Surface Doping

Liu

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Li-rich layer-structured oxides are considered promising cathode materials for their specific capacities above 250 mAh·g–1. However, the drawbacks such as poor rate performance, fast capacity fading, and the continuous transition metal (TM) migration into the Li layer hinder their commercial applications. To address these issues, surface doping of Ti and Zr was conducted to the Li- and Mn-rich layered oxide (LMR), Li1.2Mn0.54Ni0.13Co0.13O2. The drop of the average discharge potentials of the Ti- and Zr-doped LMR was reduced by 593 and 346 mV in 100 cycles, respectively. With aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy, we clarified that Ti4+ and Zr4+ ions are located near the surface of the material, anchor the surface oxygen, and stabilize the LMR structure. The difference in the strengths of the Ti–O and Zr–O bonds and the doping-resultant electronic structures were determined with density functional theory (DFT) calculations and soft X-ray absorption spectroscopy (SXAS), responsible for the electrochemical performance of surface-doped materials. These findings verify our modification strategies to enhance the cycling performances of the promising LMR cathode materials.

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“…Both types of interfaces suffer from a common issue, which is a lack of tight physical contact. [134] To alleviate this problem, the technologies of rolling and polishing are usually employed to improve the flatness of ISSEs and cathode surfaces during the assembly of solid-state batteries. [135] Nevertheless, the microscopic contact between the cathode and solid electrolyte is still a point-to-point physical contact, which leads to increased interfacial impedance and sluggish kinetic of sodium ions migration.…”

Section: Cathode-electrolyte Interfacementioning

confidence: 99%

Inorganic All‐Solid‐State Sodium Batteries: Electrolyte Designing and Interface Engineering

Yang,

Xue

et al. 2023

Advanced Materials

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Inorganic all‐solid‐state sodium batteries (IASSSBs) are emerged as promising candidates to replace commercial lithium‐ion batteries in large‐scale energy storage systems due to their potential advantages, such as abundant raw materials, robust safety, low price, high‐energy density, favorable reliability and stability. Inorganic sodium solid electrolytes (ISSEs) are an indispensable component of IASSSBs, gaining significant attention. Herein, this review begins by discussing the fundamentals of ISSEs, including their ionic conductivity, mechanical property, chemical and electrochemical stabilities. It then presents the crystal structures of advanced ISSEs (e.g., β/β′′‐alumina, NASICON, sulfides, complex hydride and halide electrolytes) and the related issues, along with corresponding modification strategies. The review also outlines effective approaches for forming intimate interfaces between ISSEs and working electrodes. Finally, current challenges and critical perspectives for the potential developments and possible directions to improve interfacial contacts for future practical applications of ISSEs are highlighted. This comprehensive review aims to advance the understanding and development of next‐generation rechargeable IASSSBs.This article is protected by copyright. All rights reserved

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Aligned Arrays of Na₂Ti₃O₇ Nanobelts and Nanowires on Carbon Nanofiber as High‐Rate and Long‐Cycling Anodes for Sodium‐Ion Hybrid Capacitors

Cited by 35 publications

References 48 publications

From 0D to 3D: Dimensional Control of Bismuth for Potassium Storage with Superb Kinetics and Cycling Stability

From 0D to 3D: Dimensional Control of Bismuth for Potassium Storage with Superb Kinetics and Cycling Stability

Feasibility to Improve the Stability of Lithium-Rich Layered Oxides by Surface Doping

Inorganic All‐Solid‐State Sodium Batteries: Electrolyte Designing and Interface Engineering

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