Three-Dimensional Sn@Ti 3C 2 Superstructure in Layer-by-Layer Through Self-Assembly for High-Performance Lithium-Ion Storage

26 Pages Posted: 30 Oct 2019

See all articles by Zhilei Wang

Zhilei Wang

Fudan University - Department of Environmental Science and Engineering

Jirong Bai

Changzhou Institute of Technology - College of Chemical Engineering and Materials

Yan Xia

Fudan University - Department of Macromolecular Science

Haiyang Xu

Fudan University - Department of Environmental Science and Engineering

Gang Chen

Fudan University - Department of Environmental Science and Engineering

Shifei Kang

University of Shanghai for Science and Technology - Department of Environmental Science and Engineering

Xi Li

Fudan University - Department of Environmental Science and Engineering

Date Written: October 23, 2019

Abstract

Powerful yet orderly nanostructure lithium-ion batteries (LIBs) are eagerly desired to satisfy the practical application of portable electronics and smart grids. However, the re-stacking and surface functionalization attached on the MXenes surface in the anode electrode severely restrict the accessibility to electrolyte ions, hindering the full utilization of their intrinsic properties. To address this challenge, the Sn@Ti3C2 materials of three dimensional (3D) are rationally designed and fabricated in unique layer-by-layer manner through self-assembly for boosting LIBs. In this design system for fast lithium-ion storage, the Ti3C2 MXene nanosheets serving as 3D scaffolds buffer Sn nanoparticles' severe volume expansion, agglomeration and enhance electrode conductivity at the interface. Furthermore, Sn nanoparticles are embedded as interlayer spacers to prevent the re-stacking of nanosheets and provide outstanding electrochemical performance. The nanostructure can increase the lithium-ion diffusion coefficient and create additional active sites. As a result, the Sn@Ti3C2 anode exhibits a superior specific capacity of up to 577 mA h g-1 at 0.5 A g-1 after 100 cycles. Comparing with pure Sn, the improved electrochemical performance of Sn@Ti3C2 can be ascribed to the high electronic conductivity of Ti3C2 MXene nanosheets. The present 3D Sn@Ti3C2 materials in layer-by-layer self-assembly perform their promising for LIBs.

Keywords: Layer-by-layer assembly, Ti3C2 MXene, 3D scaffolds, Sn anodes, lithium-ion batteries

Suggested Citation

Wang, Zhilei and Bai, Jirong and Xia, Yan and Xu, Haiyang and Chen, Gang and Kang, Shifei and Li, Xi, Three-Dimensional Sn@Ti 3C 2 Superstructure in Layer-by-Layer Through Self-Assembly for High-Performance Lithium-Ion Storage (October 23, 2019). Available at SSRN: https://ssrn.com/abstract=3474551 or http://dx.doi.org/10.2139/ssrn.3474551

Zhilei Wang

Fudan University - Department of Environmental Science and Engineering

China

Jirong Bai

Changzhou Institute of Technology - College of Chemical Engineering and Materials

China

Yan Xia

Fudan University - Department of Macromolecular Science

China

Haiyang Xu

Fudan University - Department of Environmental Science and Engineering

China

Gang Chen

Fudan University - Department of Environmental Science and Engineering

China

Shifei Kang

University of Shanghai for Science and Technology - Department of Environmental Science and Engineering

China

Xi Li (Contact Author)

Fudan University - Department of Environmental Science and Engineering ( email )

China

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