Zn<sub>2</sub>SiO<sub>4</sub>@C submicro-ellipsoids assembled from oriented nanorods with outstanding rate performance for Li-ion capacitors

Cheng, Fei; Zhu, Chengyu; Zhang, Yanan; Ye, Youwen; Li, Huanrong; Lu, An‐Hui

doi:10.1039/d2ta03993a

Cited by 9 publications

(3 citation statements)

References 58 publications

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“…As presented in Figure S8a, the XPS spectrum of C 1s manifests three distinct peaks at 284.6, 285.5, and 288.5 eV, signifying the presence of C−C, C−O, and C�O bonds, respectively. 34 Figure S8b shows that the Zn 2p XPS spectrum, typical spectrum of Zn 2+ , consists of Zn 2p 3/2 (1022.7 eV) and Zn 2p 1/2 (1045.8 eV) states. The Si 2p spectrum (Figure S8c) reveals a solitary, pronounced peak near 103 eV, aligning with the tetravalent state of silicon in silica or silicate.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The XPS survey of Zn 2 SiO 4 @C unequivocally confirms the presence of Si, C, O, and Zn elements (Figure S7). As presented in Figure S8a, the XPS spectrum of C 1s manifests three distinct peaks at 284.6, 285.5, and 288.5 eV, signifying the presence of C–C, C–O, and CO bonds, respectively Figure S8b shows that the Zn 2p XPS spectrum, typical spectrum of Zn 2+ , consists of Zn 2p 3/2 (1022.7 eV) and Zn 2p 1/2 (1045.8 eV) states.…”

Section: Resultsmentioning

confidence: 99%

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Stabilizing Zn₂SiO₄ Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

Cheng,

Wang,

Song

et al. 2024

ACS Appl. Mater. Interfaces

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Binders are crucial for maintaining the mechanical stability of the electrodes. However, traditional binders fail to adequately buffer the volume expansion of Zn 2 SiO 4 anode, causing electrode contact failure and considerable capacity loss during cycling. In this study, we propose a simple and effective solution to address these challenges through a combined strategy of hollow structure design and the introduction of an aqueous lithium poly(acrylic acid) (LiPAA) binder. Hollow structures can shorten ion-transfer distance and accommodate volume change outside. The excellent adhesion of the LiPAA binder created a secure connection between the active Zn 2 SiO 4 particles, conductive additives, and the current collector, which enhanced the mechanical stability and integrity of the electrode. As a result of these positive factors, a Zn 2 SiO 4 electrode using LiPAA as a binder can deliver an excellent capacity of 499 mAh g −1 at a high current density of 5 A g −1 and a long life span of 1000 cycles at 1 A g −1 with a capacity retention of 98%, which significantly outperforms other binders. As demonstrated by ex situ X-ray diffraction and ex situ X-ray absorption spectroscopy, the storage of lithium ions in Zn 2 SiO 4 follows a dual conversionalloying mechanism, using Zn as the redox center. In this process, Zn is first reduced to metallic Zn and then forms a LiZn alloy upon lithium-ion insertion. This work shows that LiPAA offers a promising approach to improve the cycling longevity of conversion and alloying anodes in Li-ion batteries.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Stabilizing Zn₂SiO₄ Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

Cheng,

Wang,

Song

et al. 2024

ACS Appl. Mater. Interfaces

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“…Notably, the integration of different transition-metal ions into the hostile lattice in the form of silicates holds significant potential for application in LIBs. − In regard to SiO x -based materials, silicates can bring some unique functions such as regulable operating potential, cost savings, considerable capacity, and environmentally friendly characteristics. , Compared to the larger volume expansion of other metal oxides, such as iron oxide (∼180%), cobalt oxide (∼219%), and nickel oxide (∼340%), manganese oxide has a relatively more adaptable value of 171% . Therefore, for the large volume expansion of SiO 2 (200%), manganese silicate (Mn 2 SiO 4 ) can fulfill a smaller final volume expansion (∼186%) (Supporting Information Table S1), ensuring the structural integrity under the process of Li + storage.…”

Section: Introductionmentioning

confidence: 99%

ZIF-8-Derived Carbon In-Situ Encapsulated Hollow Mn₂SiO₄ Sub-Microspheres as Anode for Lithium-Ion Batteries with Ultrahigh Capacity and Excellent Rate Performance

Zhu,

Zhang,

et al. 2023

ACS Appl. Mater. Interfaces

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Manganese silicate (Mn 2 SiO 4 ) possesses a more suitable volume expansion (186%) compared to SiO x -based materials and is also characterized by low cost, environmental friendliness, and considerable theoretical capacity. Hollow Mn 2 SiO 4 sub-microspheres encapsulated by a highly continuous network of conductive carbon (MSC) are prepared by the selftemplating method and subsequent ZIF-8-derived carbon coating. The as-prepared Mn 2 SiO 4 @C hybrid under optimal conditions (MSC-2) can provide a high capacity of 1343 mA h g −1 at 0.2 A g −1 and an excellent rate performance of 434 mA h g −1 at 10 A g −1 . Even after 500 cycles, MSC-2 can still maintain a considerable specific capacity of 554 mA h g −1 at a high current density of 5.0 A g −1 . Additionally, the full cell assembled with MSC-2 anode and LiFePO 4 cathode (MSC-2//LFP) possesses a robust energy density of 218 W h kg −1 , excellent power density of 2.5 kW kg −1 , and good cycling stability.

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ZnCl2-based activation for converting spent coffee grounds into a robust anode for Li-ion batteries

Vo,

Le,

Dang

et al. 2024

Biomass and Bioenergy

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Zn₂SiO₄@C submicro-ellipsoids assembled from oriented nanorods with outstanding rate performance for Li-ion capacitors

Abstract: A Zn2SiO4@C network with fast charge transfer kinetics assembled from submicro-ellipsoids containing uniformly aligned nanorods is designed and prepared. The assembled Zn2SiO4@C//graphene hydrogel LIC exhibits excellent electrochemical properties.

Cited by 9 publications

References 58 publications

Stabilizing Zn₂SiO₄ Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

Stabilizing Zn₂SiO₄ Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

ZIF-8-Derived Carbon In-Situ Encapsulated Hollow Mn₂SiO₄ Sub-Microspheres as Anode for Lithium-Ion Batteries with Ultrahigh Capacity and Excellent Rate Performance

ZnCl2-based activation for converting spent coffee grounds into a robust anode for Li-ion batteries

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Zn2SiO4@C submicro-ellipsoids assembled from oriented nanorods with outstanding rate performance for Li-ion capacitors

Abstract: A Zn2SiO4@C network with fast charge transfer kinetics assembled from submicro-ellipsoids containing uniformly aligned nanorods is designed and prepared. The assembled Zn2SiO4@C//graphene hydrogel LIC exhibits excellent electrochemical properties.

Cited by 9 publications

References 58 publications

Stabilizing Zn2SiO4 Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

Stabilizing Zn2SiO4 Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

ZIF-8-Derived Carbon In-Situ Encapsulated Hollow Mn2SiO4 Sub-Microspheres as Anode for Lithium-Ion Batteries with Ultrahigh Capacity and Excellent Rate Performance

ZnCl2-based activation for converting spent coffee grounds into a robust anode for Li-ion batteries

Contact Info

Product

Resources

About

Zn₂SiO₄@C submicro-ellipsoids assembled from oriented nanorods with outstanding rate performance for Li-ion capacitors

Stabilizing Zn₂SiO₄ Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

Stabilizing Zn₂SiO₄ Anode by a Lithium Polyacrylate Binder for Highly Reversible Lithium-Ion Storage

ZIF-8-Derived Carbon In-Situ Encapsulated Hollow Mn₂SiO₄ Sub-Microspheres as Anode for Lithium-Ion Batteries with Ultrahigh Capacity and Excellent Rate Performance