Aerogel Constructed by Ultrasmall Mn-Doped Silica Nanoparticles for Superior Lithium-Ion Storage

Wang, Fei; Mao, Jian

doi:10.1021/acsami.1c05620

Cited by 10 publications

(9 citation statements)

References 45 publications

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“…The specific capacity retention (SCT) is calculated (see the Supporting Information for the calculation method) to quantify the rate performance (Figure S5, Supporting Information). [ 29 ] At the current densities of 0.5, 1, 2, and 3 A g −1 , the high SCT values are 98.7%, 87.3%, 73.6%, and 62.0% respectively. Generally, the specific capacity contributed by the surface pseudo‐capacitive effect can bring about high reaction kinetics.…”

Section: Resultsmentioning

confidence: 99%

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Crystal Engineering of Silica Anode Achieving Intrinsic Zero‐Strain

Wang,

Mao,

Zhao

2023

Advanced Materials

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Si‐based anodes have large intrinsic volume expansion, which hinders their practicality and commercialisation. To address this challenge, the design principle of intrinsic zero‐strain anodes (① large intracrystalline cavities and ② strong bonds) is proposed, and silica with large intracrystalline cavities (SLIC) established by strong Si–O bonds ([SiO4] coordinate structures) is obtained and acts as an anode, achieving the intrinsic zero‐strain feature first in silicon‐based anodes. The phase structure of SLIC is maintained and the [SiO4] coordinate structure merely shows slight disorder during cycling. The feature stems from lithiation taking place by the solid‐solution insertion reaction rather than the conventional conversion/alloying addition reactions, because the solid‐solution insertion reaction for the SLIC has the lowest change in the Gibbs free energy. The SLIC anode demonstrates excellent cycling stability and high initial Coulombic efficiency (∼85%). Moreover, owing to the low working voltage (∼0.28 V) and relatively high specific capacity, the SLIC anode presents the highest gravimetric energy density among reported zero‐/quasi‐zero‐strain anodes and high volumetric energy density (around twice as much as graphite). The universality of the designing principle is also validated. Our work provides design guidelines for zero‐strain anodes in next‐generation batteries.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 99%

“…Enhancing the electric conductivity by strategies such as compositing or doping should theoretically improve its rate performance even further. [ 33,34 ]…”

Section: Resultsmentioning

confidence: 99%

Crystal Engineering of Silica Anode Achieving Intrinsic Zero‐Strain

Wang,

Mao,

Zhao

2023

Advanced Materials

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“…[ 29,30,32 ] It has been demonstrated that an appropriate thickness of SiO 2 shell can provide mechanical support for the Si lithiation/delithiation process, which can stabilize the Si structure and enhance cycling stability. [ 35,45–47 ] Nevertheless, up to now, there is barely any research on the thickness regulation of the native SiO 2 shell in SCW and lacks a profound explore to the theoretic basis of its stabilizing effect.…”

Section: Resultsmentioning

confidence: 99%

Silicon Cutting Waste Derived Silicon Nanosheets with Adjustable Native SiO₂ Shell for Highly‐Stable Lithiation/Delithiation

Zhou

et al. 2022

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storage devices since the 21st century, [7] and researchers have found that silicon (the theoretical capacity of forming Li 22 Si 5 :4200 mAh g −1 ) has the highest theoretical capacity among its known anode materials, more than ten times that of the current commercial graphite (the theoretical capacity of forming LiC 6 :372 mAh g −1 ) anode. [8][9][10] However, silicon anode has some defects, such as poor conductivity, large volume change (>300%) during lithiation/delithiation, repeated fragmentation and proliferation of solid electrolyte interphase film, and easy powdering of the electrode, which will lead to severe performance degradation. [11,12] To overcome these problems, researchers have proposed several solutions: shrinking the size of silicon to alleviate stress changes, [13] compounding with highly conductive materials to enhance conductivity, [14,15] designing porous structures of silicon to leave room for expansion of materials, [16] and adding inert phases to provide mechanical support. [17] In addition, there are some novel electrolytes [18] and binders [19] developed specifically for silicon to improve the overall performance of the battery. Nevertheless, in the practical application of silicon, there is still a very critical problem that is easily overlooked by most researchers: the preparation cost of silicon-based materials.First of all, the silicon sources for the preparation of siliconbased materials mainly include metallurgical silicon, silane (e.g., SiH 4 ), organosilicon (e.g., tetraethyl orthosilicate), silicate minerals (e.g., halloysite), biomass silicon (e.g., rice husk), silicon-based waste (e.g., waste glass), and commercial micro/ nano silicon, [20][21][22] which occupy a large part of the cost. Most of the sources are relatively expensive, and the cheap ones often undergo complex processing. Second, the preparation methods of silicon-based materials such as high-energy ball milling (HEBM), chemical vapor deposition (CVD), and metal thermal reduction are usually complicated, resulting in high energy consumption, long process, high cost, and low yield. [23,24] Therefore, based on the current preparation scheme, the preparation cost of silicon-based materials remains high, which makes its practical application difficult thus limits its commercialization process.The preparation of high-performance silicon-based materials from silicon-based waste is a good choice from the Silicon is an excellent candidate for the next generation of ultra-high performance anode materials, with the rapid iteration of the lithium-ion battery industry. High-quality silicon sources are the cornerstone of the development of silicon anodes, and silicon cutting waste (SCW) is one of them while still faces the problems of poor performance and unclear structure-activity relationship. Herein, a simple, efficient, and inexpensive purification method is implemented to reduce impurities in SCW and expose the morphology of nanosheets therein. Furthermore, HF is used to modulate the abundant native O in SCW after thermo...

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“…This demonstrates how the strong bonding network of magnesium silicate can effectively restrict the formation of Si and Li 2 Si 2 O 5 nanodomains, thus preventing the serious phase separation that occurs in SiO x @C and induces pulverization of the microparticles. From the synergistic exploitation of the improved effects of heteroatom insertion on cyclability with the porous structure of an aerogel made of ultrasmall silica particles, Wang and Mao 52 realized a material with extraordinary capacity retention. From the doping of their materials with Mn heteroatoms, they were able to effectively enhance both electron transfer and Li + diffusion.…”

Section: Homogeneity and Cyclabilitymentioning

confidence: 99%

Review on Improving the Performance of SiO_x Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook

Kim,

Li,

Gervasone

et al. 2023

Energy Fuels

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Anode materials for Li-ion batteries have attracted significant research interest owing to the growing demand for efficient and cost-effective energy storage systems. Among the various anode materials being studied, silicon-based anodes have garnered considerable attention as a result of their potential to overcome many of the limitations associated with graphite anodes. However, silicon-based anodes undergo high volumetric expansion during cycling, which results in anode failure. In contrast, silicon-oxide-based (SiO x ) materials exhibit limited volumetric expansion, making them viable candidates as anode materials in lithium-ion batteries. Despite this, there remain several challenges associated with SiO x anodes, including volumetric expansion (160−200%), poor capacity retention, and low initial coulombic efficiency. To address these issues, the incorporation of heteroatoms into SiO x anodes has been proposed as a promising strategy. In this review, we aim to provide an overview of the current state of research on SiO x anodes, including experiments and theoretical calculations, with a focus on the insertion of heteroatoms to improve the anode performance. In particular, we examine the effects of heteroatom incorporation on the anode conductivity, lithium diffusion, durability, and initial coulombic efficiency. In addition, we present a design strategy for the insertion of heteroatoms into the SiO x anodes. This review aims to provide a comprehensive understanding of the role of heteroatoms in SiO x anodes and highlight the potential for further research in this area.

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Aerogel Constructed by Ultrasmall Mn-Doped Silica Nanoparticles for Superior Lithium-Ion Storage

Cited by 10 publications

References 45 publications

Crystal Engineering of Silica Anode Achieving Intrinsic Zero‐Strain

Crystal Engineering of Silica Anode Achieving Intrinsic Zero‐Strain

Silicon Cutting Waste Derived Silicon Nanosheets with Adjustable Native SiO₂ Shell for Highly‐Stable Lithiation/Delithiation

Review on Improving the Performance of SiO_x Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook

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Aerogel Constructed by Ultrasmall Mn-Doped Silica Nanoparticles for Superior Lithium-Ion Storage

Cited by 10 publications

References 45 publications

Crystal Engineering of Silica Anode Achieving Intrinsic Zero‐Strain

Crystal Engineering of Silica Anode Achieving Intrinsic Zero‐Strain

Silicon Cutting Waste Derived Silicon Nanosheets with Adjustable Native SiO2 Shell for Highly‐Stable Lithiation/Delithiation

Review on Improving the Performance of SiOx Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook

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Silicon Cutting Waste Derived Silicon Nanosheets with Adjustable Native SiO₂ Shell for Highly‐Stable Lithiation/Delithiation

Review on Improving the Performance of SiO_x Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook