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Article
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Summary: Polymer binders are crucial for improving the electrochemical performance of silicon-based anodes in lithium-ion batteries. By designing a three-dimensional network structure, which has multiple binding points, the researchers successfully mitigated the volume expansion of the silicon particles during charge and discharge cycles. The synthesized 3D binder showed high electrochemical stability and offered a simple fabrication procedure for the electrode.
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(2022)
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(2022)
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Cancan Bian et al.
Summary: This study reports an economical and convenient method to increase the initial Coulombic efficiency (ICE) of silicon monoxide (SiO) anode material and successfully synthesizes a reaction product (MSO) with a core-shell structure. The MSO exhibits superior ICE, reversible capacity, and improved cyclic stability.
ACS APPLIED MATERIALS & INTERFACES
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Summary: In this study, an aqueous binder called PGA-ECH was used to enhance the performance of SiOx anodes, improving long-term cycling stability. The binder's structure contains abundant functional groups that form strong interactions with the SiOx surface, ensuring good interfacial adhesion. Covalent bonds and supramolecular interactions in the binder guarantee mechanical strength and elasticity. The interactions between lithium ions and the oxygen (nitrogen) atoms of carboxylate (peptide) bonds facilitate the diffusion of lithium ions.
ACS APPLIED MATERIALS & INTERFACES
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Shenghan Di et al.
Summary: SiOx is recognized as a feasible anode material for the next generation lithium-ion batteries due to its high capacity, low cost, environmental friendliness, and abundant available storage. However, the volume expansion and irreversible by-products during lithiation can cause capacity degradation and low coulombic efficiency. A rational crosslinked binder is synthesized to effectively restrict the volume change, resulting in a high performance Si-based anode material.
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Xu Liu et al.
Summary: This study reports the fabrication of sulfide-rich solid electrolyte interface (SEI) layer on the SiO/C anode surface to improve the reversible Li-storage performance at low temperature. The new modification layer is composed of inorganic-organic hybrid components, and the results show a uniform distribution of different substances in different layers. Coupled with the cathode, the modified layer achieved a capacity retention of 73% at -20 degrees C, and it was found that this layer promotes desolvation of Li+ and inhibits dendrite growth.
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Dong Jae Chung et al.
Summary: The topological optimization of prelithiated SiO materials was shown to effectively improve both the initial coulombic efficiency (ICE) and capacity retention. By using laser-assisted atom probe tomography and other techniques, two exothermic reactions related to microstructural evolution were identified as key factors in optimizing the domain size and topological arrangements of the Si active phase and Li2SiO3 buffer phase in prelithiated SiO materials. The optimized prelithiated SiO, heat-treated at 650 degrees C, demonstrated higher capacity retention and lower thickness changes after 300 cycles, along with high ICE and reversible capacity.
Article
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Zheng Weng et al.
Summary: In this study, a copolymer binder was synthesized to address the issue of integrity in SiOx particles caused by traditional binders, leading to improved electrochemical performance of SiOx anodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
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Hui Zhou et al.
Summary: A facile method to synthesize silicon oxide/graphite composite anode materials for high-capacity LIBs was proposed in this study, which showed excellent cycling performance and reversible capacity. The combination of high-temperature annealing and high-energy ball milling was effective in producing a stable and high-capacity anode material.
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Summary: Porous SiO/Ni composites were prepared as anode materials for lithium-silicon batteries using silver-assisted chemical etching and electroless Ni plating. The refinement and porosity of SiO particles were found to alleviate the volume expansion and improve the electrochemical performance of the electrodes. Electroless plating of nickel further reduced the volume expansion and increased the electrical conductivity. The P-SiO/Ni anode with 3.03% Ni content prepared at a Ni2+ concentration of 13 g/L exhibited the best electrochemical performance.
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Jack E. N. Swallow et al.
Summary: Operando soft X-ray absorption spectroscopy is used to study the chemical evolution of the solid electrolyte interphase (SEI) on the anodes of Li-ion batteries during electrochemical formation. The results reveal the sequential formation of inorganic and organic components of the SEI, and the role of fluoroethylene carbonate (FEC) in enhancing SEI formation and improving cycling performance. This technique provides new insights into the formation mechanisms and stability of electrode-electrolyte interphases for different electrode materials and electrolyte formulations.
NATURE COMMUNICATIONS
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Weiting Tang et al.
Summary: This study introduces a small molecule tannic acid (TA) with high branching into the linear poly(acrylic acid) (PAA) binder to mitigate the volume change of silicon oxide (SiOx) electrodes. The incorporation of abundant hydroxyl groups with unique carboxyl groups forms a three-dimensional crosslinked network with multiple hydrogen bonds, increasing the interfacial adhesive strength with SiOx particles. As a result, SiOx electrodes based on the PAA-TA binder exhibit excellent cycling performance and capacity retention.
ACS APPLIED MATERIALS & INTERFACES
(2022)
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Yi-Hung Liu et al.
Summary: In this study, a environmentally friendly ball milling process was used to transform the recycled silicon material from waste solar cells into lithium ion battery anode material. The ball-milled silicon was then combined with a carbon fiber paper substrate to fabricate a composite electrode. The optimized milling conditions produced an active material with moderate particle size and oxidation states, leading to improved cycling and rate performances for the recycled silicon. Introducing a hydrothermally treated substrate further enhanced the electrochemical performance of the composite electrode.
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Hongfei Yang et al.
Summary: By preparing porous SiO through silver-assisted chemical etching and then chemically nickel-plating to form porous SiO/Ni composite materials, the expansion issue of silicon monoxide can be alleviated, and the electrochemical performance of the electrode can be improved.
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Haojie Liao et al.
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Linlin Hu et al.
Summary: This study introduces a gradient hydrogen-bonding binder for silicon-based anodes in lithium-ion batteries, which effectively alleviates stress and prevents structure fracture, resulting in stable high-areal-capacity electrodes. The silicon-based pouch cell utilizing this binder demonstrates an impressive capacity retention of 80.2% after 700 cycles, showing great potential for practical applications.
ADVANCED MATERIALS
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Shuxing Wu et al.
Summary: This study introduces a three-in-one design strategy for binder systems in SiOx electrodes, utilizing hard PFA and soft TPU interweaved in a 3D conformation to confine SiOx particles through in-situ polymerization. This collaborative approach results in an areal capacity of 2.4 mAh cm(-2) at a high mass loading of >3.0 mg cm(-2) after 100 cycles, and can be extended to other metal oxides anodes such as Fe2O3 and SnO2, shedding light on the rational design of functional polymer binders for high-areal-capacity electrodes.
ACS ENERGY LETTERS
(2021)
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Chemistry, Multidisciplinary
Haesung A. Lee et al.
Summary: This study introduces the concept of an adaptive binder to tackle the silicon anode challenge in Li-ion batteries. The binder exhibits adaptable capabilities in response to gradual changes in the microenvironments surrounding silicon particles, with reversible and irreversible chemical interactions stabilizing adhesion to the silicon particle surfaces. The adaptive properties of the binder contribute to maintaining a higher charge capacity after repeated battery cycles, highlighting the importance of adaptability in designing silicon-anode binders.
ADVANCED MATERIALS
(2021)
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Zechen Wang et al.
Summary: Research shows that modified guar gum CMGG as a binder for silicon anodes effectively solves the issue of volume changes in silicon particles, maintaining high capacity and reversibility. The CMGG binder also promotes lithium-ion transport, reduces electrode polarization, and helps enhance the electrochemical stability of silicon anodes at high current density.
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(2021)
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Xiang Gao et al.
Summary: The study established an electro-chemo-mechanical model and found that yolk-shell and dual-shell structures of Si/C composite materials are more robust. The yolk-shell structure was identified as the best in terms of electrochemical performance among the five compared Si/C composites.
Review
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Wei He et al.
Summary: Li-rich cathode materials have high reversible discharge capacity, but face issues like low kinetic properties and inefficient voltage fading. Advanced technologies and innovative strategies are being developed to address these challenges and improve the performance of these materials for practical applications.
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Biyu Jin et al.
Summary: This study addresses the challenges faced by sulfur, silicon, and silicon oxide electrode materials, such as large volume change, poor conductivity, and solubility of active material intermediates, by developing a self-healable polyelectrolyte binder. Experimental evidence and computational simulations demonstrate that the novel binder offers a reliable strategy for electrodes, with enhanced performance in restraining lithium polysulfide shuttling and accelerating lithium ion transportation.
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Zhibo Song et al.
Summary: A cross-linked conductive binder (CCB) was designed to address the issue of conductive network collapse in Si-based anode materials, improving cycling stability by constructing a resilient conductive network and maintaining the integrity of the primary conductive network.
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Haoyu Li et al.
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Qiang Zhang et al.
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