Layered porous silicon encapsulated in carbon nanotube cage as ultra-stable anode for lithium-ion batteries

Ren, Yang; Yin, Xucai; Xiao, Rang; Mu, Tiansheng; Huo, Hua; Zuo, Pengjian; Ma, Yulin; Cheng, Xinqun; Gao, Yunzhi; Yin, Geping; Liu, Ying

doi:10.1016/j.cej.2021.133982

Cited by 49 publications

(31 citation statements)

References 46 publications

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“…After 200 cycles, the specific capacity of the PSi-CNT composite remained higher than 1000 mAh g −1 , while the specific capacity of the µSi-CNT composite degraded to 284.2 mAh g −1 . Impressively, the capacity retention of PSi is considerably higher than those of previously reported Si nanoparticles or nanosized Si/carbon composites [26][27][28][29][30][31]. We attribute the excellent stability of the PSi-CNT composite electrode to the nanoporous structure of the PSi, which provides additional space for internal expansion, effectively preventing the large volume change of the Si particles [27][28][29][30][31].…”

Section: Porous Silicon With Cnt Segregated Network Compositesmentioning

confidence: 69%

Constructing hierarchical porous structure in microsized silicon/carbon nanotubes composite anode with LiF-rich solid-electrolyte interfaces for highly stable lithium-ion batteries

et al. 2022

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Lithium-ion batteries (LIBs) with silicon microparticle anodes provide a high capacity, low cost, low environmental impact, and ease of production. However, the rapid capacity degradation and low Coulombic efficiency (CE) are impediments to their further development and commercialization, which are mainly caused by large volume variation and unstable solid–electrolyte interface of silicon. To break this bottleneck, here, we demonstrate that designing silicon microparticles with nanoporous structure (PSi) and confining the PSi in the carbon nanotube (CNT) segregated network can effectively suppress the volume expansion of silicon, enabling the fabrication of high-performance electrodes. The rate capability and cycling performance of the electrode are further improved by creating a hierarchical open porous structure for the PSi-CNT composite anodes via freeze drying. In addition, the mixTHF electrolyte was employed to get a thin and uniform solid-electrolyte interface (SEI), which can reduce the breakage of SEI during cycling and improve the CE and stability of the LIBs. As a result, the PSi-CNT composite anode delivers a high specific capacity of 3210.1 mAh/g at 1/15 C rate and an initial Coulombic efficiency (ICE) of 87.3%. After 100 cycles, the capacity could be maintained at over 2000 mAh/g with 99.5 % CE. In addition, hierarchical porous structured PSi-CNT composites exhibit excellent rate performance, the specific capacity could reach 2264.5 mAh/g at 5C rate. The work suggests several effective solutions that could be used to facilitate the future commercialization of silicon anodes.

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Section: Porous Silicon With Cnt Segregated Network Compositesmentioning

confidence: 69%

Constructing hierarchical porous structure in microsized silicon/carbon nanotubes composite anode with LiF-rich solid-electrolyte interfaces for highly stable lithium-ion batteries

et al. 2022

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“…It is demonstrated that the electrical/mechanical properties of electrode materials can be boosted by CNTs, specifically for the shape of segregated networks [107][108][109][110]. To overcome the mechanical instabilities of the thick electrodes, a segregated network composite of CNTs with SiMPs was formed by increasing the content of CNTs (Fig.…”

Section: Si/c Compositesmentioning

confidence: 99%

The pursuit of commercial silicon-based microparticle anodes for advanced lithium-ion batteries: A review

Liu

et al. 2022

Nano Research Energy

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Silicon (Si) is one of the most promising anode materials for high-energy lithium-ion batteries. However, the widespread application of Si-based anodes is inhibited by large volume change, unstable solid electrolyte interphase, and poor electrical conductivity. During the past decade, significant efforts have been made to overcome these major challenges toward industrial applications. This review summarizes the recent development of microscale Si-based electrodes fabricated by Si microparticles or other industrial bulk materials from the perspective of industrialization. First, the challenges for microscale Si anodes are clarified. Second, structural design strategies of stable micro-sized Si materials are discussed. Third, other critical practical metrics, such as robust binder construction and electrolyte design, are also highlighted. Finally, future trends and perspectives on the commercialization of Si-based anodes are provided. KEYWORDSsilicon, micro-sized particles, lithium-ion batteries, porous structures, polymer binder, electrolyte design Figure 1 Overview of Si-based anodes for LIBs: (a) merits and (b) fundamental challenges. Reproduced with permission from Ref. [16], © Wiley-VCH GmbH 2021.

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“…Recently, Wang et al introduced an electrochemical synthesis of silicon nanotubes (SiNTs) by applying direct electroreduction of solid CaSiO3 in CaCl2/NaCl molten salt, thus avoiding the use of a template and catalyst which are usually costly [19]. Layered CaSiO3 was chosen as the raw material for the synthesis of silicon nanotubes which can accelerate SiNTs formation.…”

Section: One-dimensional Nanostructuresmentioning

confidence: 99%

“…The most researched 2D nanomaterials at this stage are nanosheets and nanofilms which can be manufactured by physical or chemical vapor deposition [12]. To further promote the electrochemical performance of the anode on this basis, Ren et al reported a new structure that encapsulates layered porous silicon in a carbon nanotube cage [19]. Apart from morphological strategies to reduce the size of silicon in a modifiable way, the creation of mesoporous structures in silicon nanoparticles or nanosheets is another useful strategy to accommodate significant volume changes [13].…”

Section: Introductionmentioning

confidence: 99%

Nanostructures of silicon anodes in Li-ion batteries

2022

J. Phys.: Conf. Ser.

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As the application scenarios of lithium-ion batteries expand to many fields including electric vehicles and wearable devices, the energy density of current Li-ion batteries should be improved for satisfying the raising demand. In recent years, various methods have been gradually intensified, in which battery anode materials have received widespread attention. One of the most effective ways for improving battery performance is the use of silicon with different nanostructures, such as structures with different dimensions and different elemental doping, as the anode material, which can effectively improve the stability of solid electrolyte layers, enhance the number of reversible cycles and reversible capacity. This review summarizes the latest advances in silicon nanostructured anodes for lithium-ion batteries including nitrogen-doped carbon-caged silicon nanoparticles, silicon nanotubes made of layered CaSiO3, layered porous silicon encapsulated in carbon nanotube cages, silicon nanoparticles encapsulated in carbon-coated mesoporous silicon shells, and three-dimensional hierarchical porous structures. These nanostructures with excellent electrochemical properties can provide directions for the evolution of high-performance lithium-ion batteries.

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Layered porous silicon encapsulated in carbon nanotube cage as ultra-stable anode for lithium-ion batteries

Cited by 49 publications

References 46 publications

Constructing hierarchical porous structure in microsized silicon/carbon nanotubes composite anode with LiF-rich solid-electrolyte interfaces for highly stable lithium-ion batteries

Constructing hierarchical porous structure in microsized silicon/carbon nanotubes composite anode with LiF-rich solid-electrolyte interfaces for highly stable lithium-ion batteries

The pursuit of commercial silicon-based microparticle anodes for advanced lithium-ion batteries: A review

Nanostructures of silicon anodes in Li-ion batteries

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