Effect of Collector Roughness on Properties of Amorphous Silicon Thin‐Film Anodes

Xue, Wendong; Tian, Xu; Xue, Yawen; Peng, Ting; Li, Yan; Li, Yong; Sun, Jialin

doi:10.1002/celc.201900593

Cited by 5 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 13 ] Unlike crystalline silicon, the isotropic stress–strain behavior of amorphous silicon is favorable to alleviate pulverization. [ 14 ] Through this interfacial design (Figure 1b), the volume expansion of silicon can be accommodated effectively by the elastic deformation of the nylon fiber during the alloying process, and the shape can fully recover during the de‐alloying process (Figure 1c).…”

Section: Figurementioning

confidence: 99%

Flexible Interface Design for Stress Regulation of a Silicon Anode toward Highly Stable Dual‐Ion Batteries

et al. 2020

View full text Add to dashboard Cite

intercalate into graphite layers of anode and cathode, respectively. Reverse reactions occur during the discharging process. However, the development of DIBs is still hindered by the relatively low energy density, which results from the limited theoretical capacity of anions intercalation in graphiteThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

show abstract

Section: Figurementioning

confidence: 99%

Flexible Interface Design for Stress Regulation of a Silicon Anode toward Highly Stable Dual‐Ion Batteries

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The CCs are rolled Cu foils (R‐Cu), which were treated on surface by electrochemical deposition to form Cu dendrites, in order to achieve high surface roughness for enhanced adhesion. [ 47 ] Apart from their thickness, the Cu substrates differ hardly from each other in terms of morphology ( Figure a–c) and surface roughness (Figure S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Understanding Substrate Mechanics and Chemo‐Mechanical Behavior of Columnar Silicon Films to Enable Deformation Free Anodes for High‐Energy Li‐Ion Batteries

Cangaz

Lohrberg

Abendroth

et al. 2023

Adv Materials Inter

View full text Add to dashboard Cite

Columnar silicon (col‐Si) is a great candidate as anode material to achieve volumetric energy density, outperforming state‐of‐the‐art lithium‐ion batteries. The utilization of col‐Si in industrial scale is mainly restricted by poor cyclic life originating from immense volumetric expansion of Si, resulting in mechanical failure of the electrode. Understanding the mechanic and breathing behavior of col‐Si films coupled with copper current collectors (Cu‐CC) is therefore crucial to mitigate the above‐mentioned issues. In this study, structure‐mechanical changes of col‐Si anodes, which are induced by stress evolution upon (de‐)lithiation of Si, are investigated via operando electrochemical dilatometry and in situ thickness monitoring on material and stack level depending on Cu‐CC thickness (10 and 18 µm) and state‐of‐charge/balancing factor (SoC / N/P ratio). Employing moderately thick Cu‐CC (18 µm) prohibits electrode deformation significantly, achieving energy densities of 1101 and 873 Wh L−1 in multilayered‐pouch cells for N/P ratios of 1.1 and 2.0, respectively. The volume uptake that takes place after the first cycle can strongly be reduced from ∆Vcell stack: 55% to 25% by adapting N/P: 2.0 instead of 1.1. Even after volumetric growth (lithiated state), energy densities around 700 Wh L−1 are still achievable, confirming the feasibility of the col‐Si approach.

show abstract

Emerging Organic Surface Chemistry for Si Anodes in Lithium‐Ion Batteries: Advances, Prospects, and Beyond

Chen

Soltani

Chen

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

To date, lithium-ion batteries (LIBs) as one of the most promising means of energy storage have witnessed progressive upgrades of cell energy density and cost reduction, enabling, for example, longer EVs travel ranges (>300 km/charge) and deeper penetration of renewables into grid electricity. Despite the fast growing market of LIBs [3] and the worldwide conspicuous rise in LIBs production, the practical specific energy density of prevailing LIBs adopting graphite anode is approaching its theoretical limit, that is, ≈250 Wh kg −1 when paired with high-energy ceramic cathode such as nickel cobalt manganese oxides. Nevertheless, to meet the everpresent relentless demand from end-users such as portable electronics and EVs, the battery ought to be upgraded to provide 400-500 Wh kg −1 , 700-800 Wh L −1 with lower cost (<9.5 US cents/Wh, expected in 2030), and fast charge capabilities (>2C, i.e., fully charged within 1/2 h). [4] To achieve these goals, the core strategy for developing next-generation LIBs is to exploit higher-capacity battery materials that are cheap and abundant.Silicon (Si) is recognized to be one of the most appealing choices of anode materials due to its inherent low-cost, natural abundance, and the ultrahigh theoretical capacity of 3590 mAh g −1 (based on Li 15 Si 4 ) at low potential (<0.4 V vs Li/ Li + ). [5] Pioneering battery manufacturers like CATL and Tesla have Due to its uniquely high specific capacity and natural abundance, silicon (Si) anode for lithium-ion batteries (LIBs) has reaped intensive research from both academic and industrial sectors. This review discusses the ongoing efforts in tailoring Si particle surfaces to minimize the cycle-induced changes to the integral structure of particles or electrodes. As an upgrade or alternative to conventional coatings (e.g., carbons), the emerging organic moieties on Si offer new avenues toward tuning the interactions with various battery components that are key to electrochemical performances. The recent progress on understanding Si surfaces is reviewed with an emphasis on newly emerged diagnostic tools, which increasingly points to the critical role of organic components in stabilizing Si. The detailed analysis on the chemistry-structure-performance relationships in Si surface are discussed and the successful cases demonstrating the functions of the organic layers are provided, that is, via tailored interactions toward electrolyte or binder or conductive agents, are recapped. Various synthetic strategies for designing the surface organic layers are discussed and compared, highlighting the versatility and tunability of surface organic chemistry. The holistic considerations and promising research directions are summarized, shedding light on in-depth understanding and engineering Si surface chemistry toward practical LIBs application.

show abstract

Effect of Collector Roughness on Properties of Amorphous Silicon Thin‐Film Anodes

Cited by 5 publications

References 11 publications

Flexible Interface Design for Stress Regulation of a Silicon Anode toward Highly Stable Dual‐Ion Batteries

Flexible Interface Design for Stress Regulation of a Silicon Anode toward Highly Stable Dual‐Ion Batteries

Understanding Substrate Mechanics and Chemo‐Mechanical Behavior of Columnar Silicon Films to Enable Deformation Free Anodes for High‐Energy Li‐Ion Batteries

Emerging Organic Surface Chemistry for Si Anodes in Lithium‐Ion Batteries: Advances, Prospects, and Beyond

Contact Info

Product

Resources

About