Self-Templating Construction of 3D Hierarchical Macro-/Mesoporous Silicon from 0D Silica Nanoparticles

Zuo, Xiuxia; Xia, Yonggao; Ji, Qing; Gao, Xiang; Yin, Shanshan; Wang, Meimei; Wang, Xiaoyan; Qiu, Bao; Wei, Anxiang; Sun, Zaicheng; Zhu, Jin; Cheng, Ya‐Jun

doi:10.1021/acsnano.6b07450

Cited by 106 publications

(95 citation statements)

References 74 publications

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“…An alternative and effective approach to enhance electrochemical performance of Si anode is to construct mesoporous structure with high specific surface area, which can effectively accommodate the volume expansion and buffer the structural stress during repeated cycling . In addition, this mesoporous architecture provides large electrode–electrolyte interface, accelerating the electrolyte permeation and promoting the transport of lithium ions.…”

Section: Introductionmentioning

confidence: 99%

Scalable 2D Mesoporous Silicon Nanosheets for High‐Performance Lithium‐Ion Battery Anode

Song

Chen

et al. 2018

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Constructing unique mesoporous 2D Si nanostructures to shorten the lithium-ion diffusion pathway, facilitate interfacial charge transfer, and enlarge the electrode-electrolyte interface offers exciting opportunities in future high-performance lithium-ion batteries. However, simultaneous realization of 2D and mesoporous structures for Si material is quite difficult due to its non-van der Waals structure. Here, the coexistence of both mesoporous and 2D ultrathin nanosheets in the Si anodes and considerably high surface area (381.6 m g ) are successfully achieved by a scalable and cost-efficient method. After being encapsulated with the homogeneous carbon layer, the Si/C nanocomposite anodes achieve outstanding reversible capacity, high cycle stability, and excellent rate capability. In particular, the reversible capacity reaches 1072.2 mA h g at 4 A g even after 500 cycles. The obvious enhancements can be attributed to the synergistic effect between the unique 2D mesoporous nanostructure and carbon capsulation. Furthermore, full-cell evaluations indicate that the unique Si/C nanostructures have a great potential in the next-generation lithium-ion battery. These findings not only greatly improve the electrochemical performances of Si anode, but also shine some light on designing the unique nanomaterials for various energy devices.

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Section: Introductionmentioning

confidence: 99%

Scalable 2D Mesoporous Silicon Nanosheets for High‐Performance Lithium‐Ion Battery Anode

Song

Chen

et al. 2018

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128

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“…Meanwhile, the pore structure of 30–100 nm is beneficial to accommodate to the volume change of the Si@C microsphere composite during lithiation/delithiation, and to maintain the integrity of the composite. Furthermore, the Brunauer–Emmett–Teller (BET) surface area of the composite is 274 m 2 g −1 ; thus, the Si@C electrode can achieve stable charge and discharge cycles by virtue of the plentiful mesopores and the high specific surface area …”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the Brunauer-Emmett-Teller (BET) surfacea rea of the composite is 274 m 2 g À1 ;t hus, the Si@C electrode can achieves table charge and discharge cycles by virtue of the plentiful mesopores and the high specific surface area. [26] The XRD patterns of ferric citrate pyrolysis carbon (PC), CNTs, Si, andS i@C microsphere composite are shown in Figure 3a. The PC has aw eak broad peak located in the 2q range 17-258, corresponding to the characteristic peak of amorphousc arbon.…”

Section: Resultsmentioning

confidence: 99%

Si@C Microsphere Composite with Multiple Buffer Structures for High‐Performance Lithium‐Ion Battery Anodes

Liu²,

Long

et al. 2018

Chemistry A European J

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In this work, a Si@C microsphere composite with multiple buffer structures is prepared by hydrothermal treatment to solve the fatal drawbacks of serious pulverization and low electronic conductivity of Si anodes. By virtue of ferric citrate being the carefully chosen coating carbon source, the silicon nanoparticles with a SiO layer are encapsulated by the homogeneous mesoporous carbon layer. The SiO layer with appropriate toughness can primarily suppress the volume expansion of silicon. The plentiful mesopores in the carbon layer and the framework formed by carbon nanotubes with good mechanical strength can effectively buffer and accommodate the volume change of silicon, and greatly improve the infiltration of the electrolyte to the anode. Meanwhile, the mesoporous carbon and carbon nanotube network also enhance the conductivity of the composite. Therefore, the Si@C electrodes exhibit a high initial charge/discharge capacity of 2956/4197 mAh g at a current density of 0.42 A g , excellent rate capability, and outstanding cycle performance up to 800 cycles by virtue of the multiple buffer structures.

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“…Magnesiothermic reduction method is a widely used approach to synthesize silicon based anode materials [68][69][70][71]. For instance, Xie et al reported a porous silicon nanoparticle formation through magnesiothermic reduction synthesis by using the monodisperse silica sphere as stating material [72].…”

Section: Silicon Nanoparticle/carbonmentioning

confidence: 99%

Recent Progress in Synthesis and Application of Low-Dimensional Silicon Based Anode Material for Lithium Ion Battery

Sun

Liu

Zhu

2017

Journal of Nanomaterials

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Silicon is regarded as the next generation anode material for LIBs with its ultra-high theoretical capacity and abundance. Nevertheless, the severe capacity degradation resulting from the huge volume change and accumulative solid-electrolyte interphase (SEI) formation hinders the silicon based anode material for further practical applications. Hence, a variety of methods have been applied to enhance electrochemical performances in terms of the electrochemical stability and rate performance of the silicon anodes such as designing nanostructured Si, combining with carbonaceous material, exploring multifunctional polymer binders, and developing artificial SEI layers. Silicon anodes with low-dimensional structures (0D, 1D, and 2D), compared with bulky silicon anodes, are strongly believed to have several advanced characteristics including larger surface area, fast electron transfer, and shortened lithium diffusion pathway as well as better accommodation with volume changes, which leads to improved electrochemical behaviors. In this review, recent progress of silicon anode synthesis methodologies generating low-dimensional structures for lithium ion batteries (LIBs) applications is listed and discussed.

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Self-Templating Construction of 3D Hierarchical Macro-/Mesoporous Silicon from 0D Silica Nanoparticles

Cited by 106 publications

References 74 publications

Scalable 2D Mesoporous Silicon Nanosheets for High‐Performance Lithium‐Ion Battery Anode

Scalable 2D Mesoporous Silicon Nanosheets for High‐Performance Lithium‐Ion Battery Anode

Si@C Microsphere Composite with Multiple Buffer Structures for High‐Performance Lithium‐Ion Battery Anodes

Recent Progress in Synthesis and Application of Low-Dimensional Silicon Based Anode Material for Lithium Ion Battery

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