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Liu Q, Wei X, Yang C, Xu C, Cai W, Chen F. The Synergistic Effect of Aramid Nanofibers and Carbon Nanotubes on Micro-Silicon Anodes for Improved Stability and Conductivity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403938. [PMID: 39073236 DOI: 10.1002/smll.202403938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 07/11/2024] [Indexed: 07/30/2024]
Abstract
Despite the continuous development of energy storage, the challenges faced by micro-silicon anode pulverization have yet to be effectively addressed. In this work, the aramid nanofibers (ANFs) are in situ protonated on the surface of silicon micro-particles (SMPs), and also act as surfactants to bundle the carbon nanotubes (CNTs) to form ANF/CNT networks on SMPs (ANF/CNT/SMPs) at the same time. The results demonstrate that the dual-coating not only inhibits expansion and enhances structural stability but also improves conductivity, thereby promoting the cycling stability of micro-silicon anodes. The ANF/CNT/SMP anode shows cycling stability of 454 mAh g-1 at 0.2 A g-1 after 200 cycles. The expansion in thickness of the ANF/CNT/SMP electrode can be reduced by 51.5% after 100 cycles compared with the SMP electrode. The findings provide a novel approach for mitigating expansion in micro-silicon anodes through the combined coating of ANFs and CNTs.
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Affiliation(s)
- Qingqing Liu
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610064, P. R. China
| | - Xiao Wei
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610064, P. R. China
| | - Chen Yang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610064, P. R. China
| | - Changhaoyue Xu
- Department of Advanced Energy Materials, College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, P. R. China
| | - Wenlong Cai
- Department of Advanced Energy Materials, College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, P. R. China
| | - Feng Chen
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610064, P. R. China
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Li Y, Tian Y, Fu Y, Pang L, Li Y, Xiao P, Li Z. Dual immobilization of porous Si by graphene supported anatase TiO 2/carbon for high-performance and safe lithium storage. J Colloid Interface Sci 2024; 658:12-21. [PMID: 38091794 DOI: 10.1016/j.jcis.2023.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/19/2023] [Accepted: 12/01/2023] [Indexed: 01/12/2024]
Abstract
Smart surface coatings have been proven to be an effective strategy to significantly enhance the electronic conductivity and cycling stability of silicon-based anode materials. However, the single/conventional coatings face critical challenges, including low initial Coulomb efficiency (ICE), poor cyclability, and kinetics failure, etc. Hence, we proposed a dual immobilization strategy to synthesize graphene supported anatase TiO2/carbon-coated porous silicon composite (denoted as PSi@TiO2@C/Graphene) using industrial-grade ferrosilicon as lithium storage raw materials through the simple etching, combined with sol-gel and hydrothermal coating processes. In this work, the dual immobilization from the "confinement effect" of the inner TiO2 shell and the "synergistic effect" of the outer carbon shell, improves the kinetics of the electrochemical reaction and ensures the integrity of the electrode material structure during lithiation. Furthermore, the introduction of the graphene substrate offers ample space for dispersing and anchoring the Si-based granules, which in turn provides a stable 3D conductive network between the particles. As a result, the PSi@TiO2@C/Graphene electrode delivers high reversible capacity of 1605.4 mAh g-1 with 93.65% retention at 0.5 A g-1 after 100 cycles (vs. 4th discharge), high initial Coulomb efficiency (82.30%), and superior cyclability of 1159.9 mAh g-1 after 250 cycles. The above results suggest that the particle structure has great potential for applications in Si-based anode and may provide some inspiration for the design of other energy storage materials.
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Affiliation(s)
- Yangjie Li
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Yirong Tian
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Yu Fu
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Liang Pang
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
| | - Yang Li
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China; National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha 410083, China
| | - Peng Xiao
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China; National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha 410083, China.
| | - Zhuan Li
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China; National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha 410083, China.
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Zhao M, Zhang J, Costa CM, Lanceros-Méndez S, Zhang Q, Wang W. Unveiling Challenges and Opportunities in Silicon-Based All-Solid-State Batteries: Thin-Film Bonding with Mismatch Strain. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308590. [PMID: 38050893 DOI: 10.1002/adma.202308590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/17/2023] [Indexed: 12/07/2023]
Abstract
Li-metal and silicon are potential anode materials in all-solid-state Li-ion batteries (ASSBs) due to high specific capacity. However, both materials form gaps at the interface with solid electrolytes (SEs) during charging/discharging, resulting in increased impedance and uneven current density distribution. In this perspective, the different mechanisms of formation of these gaps are elaborated in detail. For Li-metal anodes, Li-ions are repeatedly stripped and unevenly deposited on the surface, leading to gaps and Li dendrite formation, which is an unavoidable electrochemical behavior. For Si-based anodes, Li-ions inserting/extracting within the Si-based electrode causes volume changes and a local separation from the SE, which is a mechanical behavior and avoidable by mitigating the strain mismatch of thin-film bonding between anode and SE. Si electro-chemical-mechanical behaviors are also described and strategies recommended to synergistically decrease Si-based electrode strain, including Si materials, Si-based composites, and electrodes. Last, it is suggested to choose a composite polymer-inorganic SE with favorable elastic properties and high ionic conductivity and form it directly on the Si-based electrode, beneficial for increasing SE strain to accommodate stack pressure and the stability of the interface. Thus, this perspective sheds light on the development and application of Si-based ASSBs.
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Affiliation(s)
- Mingcai Zhao
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa, 48940, Spain
- College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
| | - Juan Zhang
- R&D department, Jiangsu E-ontech company, Nanjing, 211106, China
| | - Carlos M Costa
- Physics Centre of Minho and Porto Universities (CF-UM-UP) Laboratory of Physics for Materials and Emergent Technologies, LapMET, University of Minho, Braga, 4710-057, Portugal
- Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, 4710-053, Portugal
| | - Senentxu Lanceros-Méndez
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa, 48940, Spain
- Physics Centre of Minho and Porto Universities (CF-UM-UP) Laboratory of Physics for Materials and Emergent Technologies, LapMET, University of Minho, Braga, 4710-057, Portugal
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, Bilbao, 48009, Spain
| | - Qi Zhang
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa, 48940, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, Bilbao, 48009, Spain
| | - Wei Wang
- College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
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Liu Q, Tang W, Yang C, Cai W, Chen F, Fu Q. Reducing volume expansion in micro silicon anodes via aramid nanofibers for stable lithium-ion batteries. Chem Commun (Camb) 2023. [PMID: 37254565 DOI: 10.1039/d3cc01909h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aramid nanofibers form networks on micro silicon particles (ANF-SMPs) by cryofixation and acid-induced protonation, whose zongzi-like wrapping structure reduces volume expansion during (de)lithiation. The obtained ANF-SMP electrode achieves a high capacity retention of 90.7% after 100 cycles at 0.5C, which maps a promising future for anodes with a long lifespan.
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Affiliation(s)
- Qingqing Liu
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Cheng Du, 610065, P. R. China.
| | - Wei Tang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Cheng Du, 610065, P. R. China.
| | - Chen Yang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Cheng Du, 610065, P. R. China.
| | - Wenlong Cai
- Department of Advanced Energy Materials, College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, P. R. China.
| | - Feng Chen
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Cheng Du, 610065, P. R. China.
| | - Qiang Fu
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Cheng Du, 610065, P. R. China.
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