Poly-dopamine carbon-coated stable silicon/graphene/CNT composite as anode for lithium ion batteries

Wang, Fangfang; Lin, Shuichao; Lu, Xuesong; Hong, Ruoyu; Liu, Huiyong

doi:10.1016/j.electacta.2021.139708

Cited by 50 publications

(29 citation statements)

References 64 publications

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“…(b) Long-term cycling stability of the h/s/h-Si@C NS electrode at a high current density of 4000 mA g –1 . (c) Performance comparison for the Si-based LIB anode materials. ,,,,− …”

Section: Resultsmentioning

confidence: 99%

Solid Silicon Nanosheet Sandwiched by Self-Assembled Honeycomb Silicon Nanosheets Enabling Long Life at High Current Density for a Lithium-Ion Battery Anode

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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A two-dimensional silicon nanosheet (2D Si NS) is promising as a lithium-ion battery anode. However, insufficient cycling life at high current density hampers its practical applications due to its easy fragileness. Rationally engineering the Si micro/nanostructure is promising to address this issue. Unfortunately, the precise construction of a dedicated micro/nanostructure into 2D Si NS meets serious challenges. Herein, a facile strategy is developed to synthesize a sandwich-like honeycomb Si NS/solid Si NS/honeycomb Si NS (h/s/h-Si NS) anode through self-assembled preparation of a sandwich-like honeycomb SiO2 NS/solid SiO2 NS/honeycomb SiO2 NS template, followed by magnesiothermic reduction. This unique structure effectively enhances the mechanical strength, enlarges the specific surface area, and reserves sufficient space to accommodate the anode volume change. A conductive carbon layer is further coated on the h/s/h-Si NS (h/s/h-Si@C NS) to construct a stable electrode/electrolyte interface. The optimal h/s/h-Si@C NS displays outstanding performance with high initial Coulombic efficiency (86%), high reversible capacity (1624 mAh g–1 after 100 cycles at 1000 mA g–1), good rate capability (over 1000 mAh g–1 at 4000 mA g–1), and long cycling life even at 4000 mA g–1 (93% retained capacity after 1000 cycles). This work provides a new strategy for constructing high-performance Si electrodes for lithium-ion battery applications.

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“…(b) Long-term cycling stability of the h/s/h-Si@C NS electrode at a high current density of 4000 mA g –1 . (c) Performance comparison for the Si-based LIB anode materials. ,,,,− …”

Section: Resultsmentioning

confidence: 99%

Solid Silicon Nanosheet Sandwiched by Self-Assembled Honeycomb Silicon Nanosheets Enabling Long Life at High Current Density for a Lithium-Ion Battery Anode

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…As the frequently-used cationic surfactant, CTAB is adsorbed on CNTs surfaces with the long alkyl chains, and endow CNTs with electro-positivity as a result of ionization in aqueous solution. 48 Thus, the CNTs can be dispersed initially by the combined electrostatic-steric hindrance action of CTAB. The surfaces of inorganic nano-SiO 2 particles are usually negatively charged due to the ionization of hydrophilic Si-OH.…”

Section: Dispersion Efficiency Of Cnts/sio 2 Llersmentioning

confidence: 99%

Synergistic effects of CNTs/SiO₂ composite fillers on mechanical properties of cement composites

Shen

Zhou

et al. 2022

RSC Adv.

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“…To mitigate the challenges above, an effective strategy is to engineer its composite with conductive carbon or provide buffer structure toward the volume variation. − Park et al designed a porous SiO x with high specific surface area, which showed an initial charge capacity of 730 mA h·g –1 and a Columbic efficiency of 52% but a considerable capacity retention of 86.3% after 100 cycles . A unique watermelon-like structure of the SiO x –TiO 2 @C anode was engineered via the sol–gel method by Li et al, which performed an initial charge capacity and Columbic efficiency of 1011 mA h·g –1 and 63%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Boosting Cyclability and Rate Capability of SiO_x via Dopamine Polymerization-Assisted Hybrid Graphene Coating for Advanced Lithium-Ion Batteries

Gu¹,

Wang

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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SiO x suffers from the 200% volume change during cycling and low electronic conductivity, resulting in poor cyclability and rate capability as a lithium-ion battery anode. Herein, we demonstrate a dopamine polymerization-guided carbon coating for SiO x anodes (SiO x @PDA@GNH). SiO x @PDA@GNH delivers charge capacities of 1269 and 1140 mA h·g–1 at charge rates of 0.05 and 3 C, respectively, and a capacity retention of 79.60% after 150 cycles at 1 C. A full cell with LiNi0.8Co0.1Mn0.1O2 or cathode demonstrates a capacity retention of >80% after 100 cycles at the rate of 0.33 C with an area capacity over 3.2 mA h·cm–2. Suppressed crack and overgrowth of the SEI layer are the key contributions for the improved performance. These results enlighten a practical pathway for the designing and modifications of SiO x anodes for high energy density lithium-ion batteries.

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Poly-dopamine carbon-coated stable silicon/graphene/CNT composite as anode for lithium ion batteries

Cited by 50 publications

References 64 publications

Solid Silicon Nanosheet Sandwiched by Self-Assembled Honeycomb Silicon Nanosheets Enabling Long Life at High Current Density for a Lithium-Ion Battery Anode

Solid Silicon Nanosheet Sandwiched by Self-Assembled Honeycomb Silicon Nanosheets Enabling Long Life at High Current Density for a Lithium-Ion Battery Anode

Synergistic effects of CNTs/SiO₂ composite fillers on mechanical properties of cement composites

Boosting Cyclability and Rate Capability of SiO_x via Dopamine Polymerization-Assisted Hybrid Graphene Coating for Advanced Lithium-Ion Batteries

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Poly-dopamine carbon-coated stable silicon/graphene/CNT composite as anode for lithium ion batteries

Cited by 50 publications

References 64 publications

Solid Silicon Nanosheet Sandwiched by Self-Assembled Honeycomb Silicon Nanosheets Enabling Long Life at High Current Density for a Lithium-Ion Battery Anode

Solid Silicon Nanosheet Sandwiched by Self-Assembled Honeycomb Silicon Nanosheets Enabling Long Life at High Current Density for a Lithium-Ion Battery Anode

Synergistic effects of CNTs/SiO2 composite fillers on mechanical properties of cement composites

Boosting Cyclability and Rate Capability of SiOx via Dopamine Polymerization-Assisted Hybrid Graphene Coating for Advanced Lithium-Ion Batteries

Contact Info

Product

Resources

About

Synergistic effects of CNTs/SiO₂ composite fillers on mechanical properties of cement composites

Boosting Cyclability and Rate Capability of SiO_x via Dopamine Polymerization-Assisted Hybrid Graphene Coating for Advanced Lithium-Ion Batteries