Fibrin biopolymer hydrogel-templated 3D interconnected Si@C framework for lithium ion battery anodes

Kim, Woong Ju; Kang, Jin Gu; Kim, Dong Wan

doi:10.1016/j.apsusc.2021.149439

Cited by 15 publications

(6 citation statements)

References 47 publications

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“…At present, research on wearable power storage devices is mainly focused on metal cations, for example, Li + , Na + , and Al 3+ , while nonmetallic cations (such as NH 4 + and H + ) as charge carriers are rarely studied. 6,7,15 Compared with metal cations, nonmetallic cations are renewable and inexpensive. 16,17 NH 4 + is one of the most representative charge carriers and has a small hydrated ion, which enables it to diffuse quickly in an electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Self-powered wearable sensing devices based on a flexible ammonium-ion battery with fatigue resistance and frost resistance based on a strong and tough hydrogel

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Self-powered wearable sensing devices based on a flexible ammonium-ion battery with fatigue resistance and frost resistance based on a strong and tough hydrogel

et al. 2022

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“…During the first anodic scan, delithiation also proceeded through a two-step reaction occurring at 0.32 and 0.49 V, respectively [ 11 ]. These cathodic and anodic peaks increased progressively with cycling, originating from electrode activation [ 62 , 63 ]. Both n-SX/A and SX/A demonstrated comparable CV behaviors.…”

Section: Resultsmentioning

confidence: 99%

“…6 a), two semicircles appeared in the high- (~ 600 Hz) and mid- (~ 2 Hz) regions, followed by a linear segment in the low-frequency region (0.5–0.01 Hz). The semicircles in the high- and mid-frequency regions were attributed to the resistances of the SEI layers ( R SEI ) and charge-transfer reactions ( R ct ), respectively [ 8 , 63 – 66 ]. The straight line at the low-frequency region was associated with the solid-state diffusion of Li (D Li ) within siloxene [ 63 , 65 – 67 ].…”

Section: Resultsmentioning

confidence: 99%

Boosted Lithium-Ion Transport Kinetics in n-Type Siloxene Anodes Enabled by Selective Nucleophilic Substitution of Phosphorus

Kim,

Kang

et al. 2024

Nano-Micro Lett.

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Doped two-dimensional (2D) materials hold significant promise for advancing many technologies, such as microelectronics, optoelectronics, and energy storage. Herein, n-type 2D oxidized Si nanosheets, namely n-type siloxene (n-SX), are employed as Li-ion battery anodes. Via thermal evaporation of sodium hypophosphite at 275 °C, P atoms are effectively incorporated into siloxene (SX) without compromising its 2D layered morphology and unique Kautsky-type crystal structure. Further, selective nucleophilic substitution occurs, with only Si atoms being replaced by P atoms in the O3≡Si–H tetrahedra. The resulting n-SX possesses two delocalized electrons arising from the presence of two electron donor types: (i) P atoms residing in Si sites and (ii) H vacancies. The doping concentrations are varied by controlling the amount of precursors or their mean free paths. Even at 2000 mA g−1, the n-SX electrode with the optimized doping concentration (6.7 × 1019 atoms cm−3) delivers a capacity of 594 mAh g−1 with a 73% capacity retention after 500 cycles. These improvements originate from the enhanced kinetics of charge transport processes, including electronic conduction, charge transfer, and solid-state diffusion. The approach proposed herein offers an unprecedented route for engineering SX anodes to boost Li-ion storage.

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“…However, as the charge-discharge process was repeated, the SiNPs were shed onto the carbon skeleton, which led to shorter cycle life and faster capacity decay of the electrode. Therefore, Kim et al successfully developed an Si@C composite material with a three-dimensional porous network structure (3D Si@C) [213] by using the hydrogen bond between the hydroxyl group on silicon and the amide of the fibrin (Figure 7d). Most importantly, this structure had a tunable porosity, which enabled better controllability of the volume expansion of silicon.…”

Section: Porous Carbonmentioning

confidence: 99%

Strategies for Controlling or Releasing the Influence Due to the Volume Expansion of Silicon inside Si−C Composite Anode for High-Performance Lithium-Ion Batteries

Zhang

Weng

et al. 2022

Materials

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Currently, silicon is considered among the foremost promising anode materials, due to its high capacity, abundant reserves, environmental friendliness, and low working potential. However, the huge volume changes in silicon anode materials can pulverize the material particles and result in the shedding of active materials and the continual rupturing of the solid electrolyte interface film, leading to a short cycle life and rapid capacity decay. Therefore, the practical application of silicon anode materials is hindered. However, carbon recombination may remedy this defect. In silicon/carbon composite anode materials, silicon provides ultra-high capacity, and carbon is used as a buffer, to relieve the volume expansion of silicon; thus, increasing the use of silicon-based anode materials. To ensure the future utilization of silicon as an anode material in lithium-ion batteries, this review considers the dampening effect on the volume expansion of silicon particles by the formation of carbon layers, cavities, and chemical bonds. Silicon-carbon composites are classified herein as coated core-shell structure, hollow core-shell structure, porous structure, and embedded structure. The above structures can adequately accommodate the Si volume expansion, buffer the mechanical stress, and ameliorate the interface/surface stability, with the potential for performance enhancement. Finally, a perspective on future studies on Si−C anodes is suggested. In the future, the rational design of high-capacity Si−C anodes for better lithium-ion batteries will narrow the gap between theoretical research and practical applications.

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Fibrin biopolymer hydrogel-templated 3D interconnected Si@C framework for lithium ion battery anodes

Cited by 15 publications

References 47 publications

Self-powered wearable sensing devices based on a flexible ammonium-ion battery with fatigue resistance and frost resistance based on a strong and tough hydrogel

Self-powered wearable sensing devices based on a flexible ammonium-ion battery with fatigue resistance and frost resistance based on a strong and tough hydrogel

Boosted Lithium-Ion Transport Kinetics in n-Type Siloxene Anodes Enabled by Selective Nucleophilic Substitution of Phosphorus

Strategies for Controlling or Releasing the Influence Due to the Volume Expansion of Silicon inside Si−C Composite Anode for High-Performance Lithium-Ion Batteries

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