A novel Si film with Si nanocrystals embedded in amorphous matrix on Cu foil as anode for lithium ion batteries

Qin, Yuliang; Li, Fēi; Bai, Xiaobing; Sun, Xiaolei; Liu, Dequan; He, Dawei

doi:10.1016/j.matlet.2014.09.101

Cited by 14 publications

(2 citation statements)

References 16 publications

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“…The amorphous phase is further confirmed by the corresponding selected area electron diffraction (SAED) pattern (Figure c), owing to the characteristic diffuse rings of the Ge phase. The high-resolution TEM image in Figure d once again verifies that the outermost Ge sheath is amorphous, consisting of a few Ge nanograins (∼5 nm), which should be induced by the high-energy electron beam irradiation. , …”

Section: Resultsmentioning

confidence: 64%

“…The high-resolution TEM image in Figure 2d once again verifies that the outermost Ge sheath is amorphous, consisting of a few Ge nanograins (∼5 nm), which should be induced by the high-energy electron beam irradiation. 60,61 As described in Experimental Section, the PVDF−HFP/SiO 2 layer was in situ coated onto the surface of the Ge array through the casting of the acetone-based slurry of the PVDF− HFP/SiO 2 mixture. Compared to Figure 1b, low-and high (inset)-magnification SEM images in Figure 3a both confirm that the Ge surfaces are completely trapped in the polymer matrix.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Reinforcing Germanium Electrode with Polymer Matrix Decoration for Long Cycle Life Rechargeable Lithium Ion Batteries

Sun

Huang

et al. 2017

ACS Appl. Mater. Interfaces

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Germanium is a promising anode material for lithium ion batteries because of its high theoretical specific capacity and low operation voltage. However, a significant challenge in using Ge-based anodes is the large volume variation during cycling that causes pulverization and capacity fade. Despite intense studies in the past decade, unsatisfactory cycling stability of the Ge-based electrodes still impedes their widespread applications. In this study, we demonstrate a high-performance electrode through the synergistic combination of a high-capacity Ge film grown on a three-dimensional current collector and an in situ formed poly(vinylidene fluoride)-hexafluoropropene/SiO protective layer. Specifically, the polymer matrix is in continuous contact with the surface of the Ge shell, which provides improved mechanical and ionic transport properties. As a highlight, we present impressive cycling stability over 3000 cycles at 1 C rate with a capacity retention as high as 95.7%. Furthermore, the LiCoO-Ge full battery operates at an average voltage of 3.3 V at 0.5 C and maintains good electrochemical performance, suggesting great potential for applications in energy storage and conversion devices.

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Section: Resultsmentioning

confidence: 64%

Section: ■ Results and Discussionmentioning

confidence: 99%

Reinforcing Germanium Electrode with Polymer Matrix Decoration for Long Cycle Life Rechargeable Lithium Ion Batteries

Sun

Huang

et al. 2017

ACS Appl. Mater. Interfaces

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A Hierarchical, Nanofibrous, Tin‐Oxide/Silicon Composite Derived from Cellulose as a High‐Performance Anode Material for Lithium‐Ion Batteries

Jia

Huang

2017

ChemistrySelect

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A hierarchical nanofibrous tin-oxide/silicon composite with tin oxide nanoparticles anchored on the silicon nanofiber surface is fabricated employing natural cellulose substance (ordinary filter paper) as structural template. Tin oxide gel is deposited uniformly onto the surface of the silicon nanofibers that prepared by magnesiothermic reduction of the silica replica of the filter paper, and thereafter, the as-prepared tin-oxide À gel/ silicon nanocomposite is calcined in argon atmosphere to yield the tin-oxide/silicon nanocomposite. The resulted tin-oxide/ silicon nanocomposite possesses a hierarchical network structure that inherited from the initial cellulose substance. When the nanocomposite is evaluated as an anode material in lithium-ion batteries, it exhibits superior lithium storage properties compared with the pure silicon nanofiber and tin oxide powder matters. For such a nanocomposite with 58.8 wt% tin oxide content delivers a specific reversible capacity of 547.8 mAh g À 1 after 150 discharge/charge cycles at 100 mA g À 1 . The improved lithium storage performances are attributed to the unique three-dimensional hierarchical porous network structure of the nanocomposite, high dispersed fine tin oxide nanoparticles on the silicon nanofiber surface, as well as the synergistic effects between the silicon nanofibers and the tin oxide nanoparticles on the lithium storage.[a] Dr.

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Synthesis and electrochemical properties of bioderived silicon particles for lithium ion battery anodes

Sun

Qiao

2021

J Mater Sci: Mater Electron

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A novel Si film with Si nanocrystals embedded in amorphous matrix on Cu foil as anode for lithium ion batteries

Cited by 14 publications

References 16 publications

Reinforcing Germanium Electrode with Polymer Matrix Decoration for Long Cycle Life Rechargeable Lithium Ion Batteries

Reinforcing Germanium Electrode with Polymer Matrix Decoration for Long Cycle Life Rechargeable Lithium Ion Batteries

A Hierarchical, Nanofibrous, Tin‐Oxide/Silicon Composite Derived from Cellulose as a High‐Performance Anode Material for Lithium‐Ion Batteries

Synthesis and electrochemical properties of bioderived silicon particles for lithium ion battery anodes

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