Highly Stretchable Polymer Binder Engineered with Polysaccharides for Silicon Microparticles as High‐Performance Anodes

Wen, Yanfen; Zhang, Hongwei

doi:10.1002/cssc.202000911

Cited by 22 publications

(20 citation statements)

References 57 publications

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“…However, further refinements in Cu weight are needed to compete with the lightweight Cu foils (5-15 µm) used in slurry-based electrodes. [99][100][101][102][103] The stable capacity behavior observed for Si/CuSi coincided with the formation of a robust interconnected framework of nanometer-sized Si ligaments, capable of overcoming stressinduced fracturing of the SEI layer upon repeated expansion and contraction of the active material. [1,2,62,68,[108][109][110] SEM of Si/CuSi (1.24 mg cm −2 ) after 5 and 50 cycles (Figure 6a,b) allowed the evolution of the crystalline Si NWs to an amorphous Si mesh to be tracked.…”

Section: Resultsmentioning

confidence: 82%

“…Table S2, Supporting Information, compares this work to similar high loading nano-Si systems in terms of synthetic procedure, achievable Si loading, corresponding areal capacity and electrode thickness. Direct growth of Si NWs on a 3D textured CuSi NW structure has advantages over conventional slurry-based Si systems, [99][100][101][102][103] improving contact with the current collector and eliminating dead weight from inactive binders/additives. Notably, our work differs from other previously reported binder-free Si growth procedures, [30,58,[104][105][106] as there is no requisite for a catalyst pre-treatment step, that is, solvent evaporation, electrodeposition, thermal evaporation.…”

Section: Resultsmentioning

confidence: 99%

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A Nanowire Nest Structure Comprising Copper Silicide and Silicon Nanowires for Lithium‐Ion Battery Anodes with High Areal Loading

Collins

Kilian

Geaney

et al. 2021

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expansion during charge (300% when fully lithiated). [9][10][11][12][13] The build-up of mechanical stress through expansion of the active layer causes a loss of electrical contact with the non-expanding current collector, exacerbating capacity fade. Nanostructuring can alleviate mechanical stress build-up through smaller particle sizes, structural porosity and void spaces. [9,10] Nanoparticles (NPs), [14][15][16][17] nanowires (NWs), [18][19][20][21][22][23][24][25] and nanotubes (NTs) [26][27][28][29] are the most widely used morphologies, allowing for structural relaxation through shortened diffusion channels, increased porosity and larger surface area to volume ratios.Cu is the optimal current collector for lithium-ion battery anodes, due to its superior electrical conductivity over stainless steel (SS) and other carbon-based substrates. However, direct growth of Si on Cu yields electrochemically inactive CuSi compounds. [30][31][32] Alternatively, slurry-based Si electrodes suffer from issues of capacity fade as harsh expansion leads to electrical contact loss with the current collector. [33][34][35] Also, issues of capacity fade are heightened for thicker slurry layers, behaving similarly to bulk Si. [36,37] Si composites with graphite have gained huge popularity over recent years, synergistically combining the high lithiation capacity of Si with the low cost, stability, and scalability of carbon. [38][39][40][41][42] Graphite incorporation can alleviate instability issues common with Si-rich electrodes. [43,44] Karuppiah et al. demonstrated impressive long-term stability of slurry-based electrodes of Si NWs directly grown on graphite, retaining 87% capacity after 250 cycles versus Li metal. [44] Similarly, Datta et al. found that Si/graphite stability could be further enhanced through amorphous carbon coating, removing direct contact between Si and the electrolyte, and delivering a stable capacity of 660 mAh g −1 . [45] Slurry-based composites allow for high achievable Si loadings while maintaining anode stability. However, thick slurry layers suffer from poor fast-rate performance and inactive slurry additions negatively impact energy density. [46][47][48][49] The incorporation of Si into metallic or carbonbased frameworks like Mxenes, [50,51] graphene, [52,53] CNTs, [54,55] and CNFs [56,57] has allowed considerable improvements in cell stability, although the continued presence of inactive slurry components increases dead weight. Directly grown electrodes offer a multitude of advantages over slurry-based configurations, however, achieving stable performance of high loading binder-free Si electrodes has historically been difficult.High loading (>1.6 mg cm −2 ) of Si nanowires (NWs) is achieved by seeding the growth from a dense array of Cu 15 Si 4 NWs using tin seeds. A one-pot synthetic approach involves the direct growth of CuSi NWs on Cu foil that acts as a textured surface for Sn adhesion and Si NW nucleation. The high achievable Si NW loading is enabled by the high surface area of CuSi NWs and bolst...

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

A Nanowire Nest Structure Comprising Copper Silicide and Silicon Nanowires for Lithium‐Ion Battery Anodes with High Areal Loading

Collins

Kilian

Geaney

et al. 2021

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“…To overcome these challenges, several strategies have been investigated for example novel architechture of electrodes, functional separator, nano‐scale active materials. Furthermore, synthetic and natural compound‐based binders have also been incorporated with the electrodes [37–55] …”

Section: Introductionmentioning

confidence: 99%

Application of Guar Gum and its Derivatives as Green Binder/Separator for Advanced Lithium‐Ion Batteries

Kaur

Santra

2022

ChemistryOpen

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Since their first commercialization in the 1990s,lithium-ion batteries (LIBs) have become an indispensible part of our everyday life in particular for portable electronic devices. LIBs have been considered as the most promising sustainable high energy density storage device. In recent years, there is a strong demand of LIBs for hybrid electric and electric vehicles to lower carbon footprint and mitigate climate change. However, LIBs have several issues, for example, high cost and safety issues such as over discharge, intolerance to overcharge, high temper-ature operation etc. To address these issues several new types of electrodes are being studied. Traditional binder PVDF is costly, difficult to recyle, undergoes side reactions at high temperature and cannot stabilize high energy density electrodes. To overcome these challenges, diiferent binders have been introduced with these electrodes. This minireview is focused on the application of guar gum as a binder for different electrodes and separator. The electrochemical performance of electrodes with guar gum has been compared with other binders.

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“…Silicon (Si) is the most promising candidate for next‐generation lithium‐ion batteries (LIBs), owing to its high specific capacity (∼3579 mAh g −1 for Li 15 Si 4 , ten times that of commercial graphite), low discharge voltage (<0.5 V vs. Li/Li + ), environmental friendliness and natural abundance [1–4] . The development and application of silicon anode can realize high energy density and thus satisfy the ever‐growing demands in the electrical vehicles [5] .…”

Section: Introductionmentioning

confidence: 99%

“…Silicon (Si) is the most promising candidate for next-generation lithium-ion batteries (LIBs), owing to its high specific capacity (~3579 mAh g À 1 for Li 15 Si 4 , ten times that of commercial graphite), low discharge voltage (< 0.5 V vs. Li/Li + ), environmental friendliness and natural abundance. [1][2][3][4] The development and application of silicon anode can realize high energy density and thus satisfy the ever-growing demands in the electrical vehicles. [5] Unfortunately, the wider utilization of silicon for LIBs is hampered by several major drawbacks such as its large volume change (~400 %) during lithium ion insertion/extraction processes, low electrical conductivity (~10 À 3 S cm À 1 ), ionic conductivity (10 À 14 À 10 À 13 cm 2 s À 1 ) and high fabrication cost.…”

Section: Introductionmentioning

confidence: 99%

Silicon‐Based Nanorod Anodes by Employing Bacterial Cellulose Derived Carbon Skeleton Towards Lithium‐Ion Batteries

Wang

Gao

Zhang

et al. 2022

Batteries & Supercaps

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Huge volume change and high cost of silicon (Si) during the lithium insertion/extraction processes are still major challenges in practical application of Li‐ion batteries (LIBs). Herein, for the first time, a scalable one‐dimensional (1D) robust Si/C nanorods are developed by using pyrolytic bacterial cellulose (pBC) as 1D carbon skeleton and introducing carbon dioxide (CO2) greenhouse gas into traditional magnesiothermic reduction reaction, to accelerate the commercial utilization of Si/C composite electrodes. pBC arrays are generated via a self‐assembled parallel arrangement process in the SiO2/pBC hybrids. Notably, pBC arrays as a strong structural support and CO2‐derived in‐situ generated amorphous carbon as an ideal encapsulation endow Si/C nanorods with high structure robustness and good electronic conductivity. In particular, Si‐based nanorods anodes with carbon component content of 11 wt % deliver high reversible specific capacity, good Coulombic efficiency and impressive cycling performance. Such excellent electrochemical performance is attributed to unique Si/C nanorod structure and its superior properties, which can provide good accommodation of volume changes, superior electrolyte wetting, and fast electrons and lithium ions transportation pathways during charging and discharging processes.

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Highly Stretchable Polymer Binder Engineered with Polysaccharides for Silicon Microparticles as High‐Performance Anodes

Abstract: Figure 4. The cross-sectional SEM images of PAA/mSi and Am-PAA/mSi electrodes(a, b) beforeand (c, d) after cycling stability test.

Cited by 22 publications

References 57 publications

A Nanowire Nest Structure Comprising Copper Silicide and Silicon Nanowires for Lithium‐Ion Battery Anodes with High Areal Loading

A Nanowire Nest Structure Comprising Copper Silicide and Silicon Nanowires for Lithium‐Ion Battery Anodes with High Areal Loading

Application of Guar Gum and its Derivatives as Green Binder/Separator for Advanced Lithium‐Ion Batteries

Silicon‐Based Nanorod Anodes by Employing Bacterial Cellulose Derived Carbon Skeleton Towards Lithium‐Ion Batteries

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