A Multilayered Silicon-Reduced Graphene Oxide Electrode for High Performance Lithium-Ion Batteries

Gao, Xinfeng; Li, Jianyang; Xie, Yuanyuan; Guan, Dongsheng

doi:10.1021/acsami.5b01230

Cited by 83 publications

(59 citation statements)

References 44 publications

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“…To minimize the negative influences of volume expansion, various types of nano-structured Si materials, including silicon nanotubes [8,9], silicon nanowires [10,11], and silicon nano-porous particles [12,13], have been developed.…”

Section: Introductionmentioning

confidence: 99%

Environmental Emissions from Chemical Etching Synthesis of Silicon Nanotube for Lithium Ion Battery Applications

Guan

Wang

et al. 2018

JMMP

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Silicon nanotubes (SiNTs) have been researched as a promising anode material to replace graphite in next-generation lithium ion batteries. Chemical etching synthesis of SiNTs is a simple, controllable and scalable process for SiNT fabrication, but the environmental emissions are of grave concern. In this paper, the process emissions from chemical etching synthesis of SiNTs as anode for lithium ion batteries is studied through experimental techniques, considering the categories of aqueous wastes, gaseous emissions, aqueous nano-particle emissions, and gaseous aerosol emissions. The synthesized SiNTs are measured at 10 µm length and 1-2.2 µm diameter, and can maintain a specific capacity of over 800 mAh/g after 100 cycles in battery testing. In aqueous waste, the chemical compositions of all elements participating in the chemical etching are experimentally determined, with AgNO 3 and Co(NO 3 ) 2 identified as the major pollutants. The only gaseous emission generated from the chemical etching synthesis process is H 2 , with 0.0088 ± 0.0002 mol H 2 generated to produce 1.0 mg SiNTs. The aqueous nanoparticle sizes are found to be between 250 nm and 1540 nm. A large number of aerosol nanoparticle emissions of up to 2.96 × 10 7 particles/cm 3 are detected through in situ experimental measurement.

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Section: Introductionmentioning

confidence: 99%

Environmental Emissions from Chemical Etching Synthesis of Silicon Nanotube for Lithium Ion Battery Applications

Guan

Wang

et al. 2018

JMMP

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“…15,16,17,18,19,20,21,22,23 Due to its high electric conductivity, superior mechanical strength and flexibility, graphene can enhance overall electric conductivity and facilitate Li + diffusion when preparing composite material with Si, thus improving the electrochemical performance of the materials. 24,25,26,27,28 Apart from stabilizing SiNPs, graphene as an anode candidate for LIB can store more lithium ions than graphite because lithium ions can not only be stored on both sides of graphene sheets, but also on the edges and covalent sites.…”

Section: Significance and Research Objective Of The Projectmentioning

confidence: 99%

“…17,18,19,20,21,22,23,196,197,198,199,200 Graphene is electrically conducting, mechanically strong, and rather easy to prepare from exfoliated graphite. Which means graphene is an attractive support for other high-storage capacity materials.…”

Section: Si/graphene Composite Anodementioning

confidence: 99%

“…The prepared composite electrode delivered a reversible capacity of 2787 mAh·g -1 at a charging rate of 100 mA·g -1 , and a stable capacity over 1000 mAh·g -1 at 1000 mA·g -1 after 50 cycles. 19 Chang et al …”

Section: Si/graphene Composite Anodementioning

confidence: 99%

“…13 Especially graphene or RGO, with a few-layer two-dimensional honeycomb carbon structure, has great advantages for its high electron mobility, huge specific surface area and superior electrical conductivity when prepared meticulously. 15 Although improvements have been achieved using graphene sheets to stabilize SiNPs 16,17,19,20,21,22,23,209,211,256,257 , it is still highly needed to explore a cost-efficient and green way to prepare Si/graphene composite.…”

Section: Introductionmentioning

confidence: 99%

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Silicon-based anode materials for lithium-ion batteries

Xu¹

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While lithium-ion batteries (LIBs) have found wide applications in customer electronics, such as cellular phones and lap-top computers, the performance of the currently LIBs does not meet the market requirements for massive energy storage, such as electric vehicles and smart grids. One of the critical issues is the low energy capacity of the electrode materials. Graphite has been a common anode for LIBs, but the maximum capacity (372 mAh·g -1 ) of graphite has hindered its application in advanced LIBs. Substituting graphite with materials of high capacity has become an active research area. Graphene can store more Li + than graphite because Li + can not only be stored on both sides of graphene sheets, but also on the edges and covalent sites. Being electric conducting and mechanically strong, graphene is also an attractive support for other high capacity materials, such as silicon (Si). Si possesses the highest known theoretical capacity (4200 mAh·g -1 , fully lithiated).However, Si suffers from a critical problem, namely severe volume change during charging/discharging, resulting in poor reversibility and rapid capacity decay. This PhD project aims to improve the stability and suitability of Si nanoparticles (SiNPs) for LIBs.The first aspect in this thesis is to demonstrate a novel approach to wrapping SiNPs in a reduced graphene oxide (RGO) aerogel framework. The aerogel-typed RGO architecture not only provided a porous network to accommodate the volume change of entrapping SiNPs, but also facilitated electrolyte transport and electron transfer.The second aspect in this thesis is to report a simple, green and scalable method to prepare RGO using gallic acid (GA) as a chemical reducing reagent. RGO samples reduced by GA showed a superior Li + storage capacity compared with graphite and other reported graphene materials as anode for LIBs.The third aspect in this thesis is to report on the preparation of RGO-stabilized SiNPs, a sandwich-typed composite material (Si@RGO). As a result, good battery performance of Si@RGO was obtained, 1074 mAh·g -1 at the 5th cycle and 900 mAh·g -1 at the 100th cycle with a capacity retention of about 84% as well as excellent rate capability. II Declaration by author

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Facile Synthesis of Blocky SiO_x/C with Graphite‐Like Structure for High‐Performance Lithium‐Ion Battery Anodes

Sun

Yin

et al. 2017

Adv Funct Materials

282

198

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SiOx‐containing graphite composites have aroused great interests as the most promising alternatives for practical application in high‐performance lithium‐ion batteries. However, limited loading amount of SiOx on the surface of graphite and some inherent disadvantages of SiOx such as huge volume variation and poor electronic conductivity result in unsatisfactory electrochemical performance. Herein, a novel and facile fabrication approach is developed to synthesize high‐performance SiOx/C composites with graphite‐like structure in which SiOx particles are dispersed and anchored in the carbon materials by restoring original structure of artificial graphite. The multicomponent carbon materials are favorable for addressing the disadvantages of SiOx‐based anodes, especially for the formation of stable solid electrolyte interphase, maintaining structural integrity of electrode materials and improving electrical conductivity of electrode. The resultant SiOx/C anodes demonstrate high reversible capacities (645 mA h g−1), excellent cycling stability (≈90% capacity retention for 500 cycles), and superior rate capabilities. Even at high pressing density (1.3 g cm−3), SiOx/C anodes still present superior cycling performance due to the high tap density and structural integrity of electrode materials. The proposed synthetic method can also be developed to address other anode materials with inferior electronic conductivity and huge volume variation.

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A Multilayered Silicon-Reduced Graphene Oxide Electrode for High Performance Lithium-Ion Batteries

Cited by 83 publications

References 44 publications

Environmental Emissions from Chemical Etching Synthesis of Silicon Nanotube for Lithium Ion Battery Applications

Environmental Emissions from Chemical Etching Synthesis of Silicon Nanotube for Lithium Ion Battery Applications

Silicon-based anode materials for lithium-ion batteries

Facile Synthesis of Blocky SiO_x/C with Graphite‐Like Structure for High‐Performance Lithium‐Ion Battery Anodes

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A Multilayered Silicon-Reduced Graphene Oxide Electrode for High Performance Lithium-Ion Batteries

Cited by 83 publications

References 44 publications

Environmental Emissions from Chemical Etching Synthesis of Silicon Nanotube for Lithium Ion Battery Applications

Environmental Emissions from Chemical Etching Synthesis of Silicon Nanotube for Lithium Ion Battery Applications

Silicon-based anode materials for lithium-ion batteries

Facile Synthesis of Blocky SiOx/C with Graphite‐Like Structure for High‐Performance Lithium‐Ion Battery Anodes

Contact Info

Product

Resources

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Facile Synthesis of Blocky SiO_x/C with Graphite‐Like Structure for High‐Performance Lithium‐Ion Battery Anodes