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Enveloping SiOx in N-doped carbon for durable lithium storage via an eco-friendly solvent-free approach

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Abstract

Silicon oxides, SiOx, have aroused significant interests as high-capacity lithium-ion battery anode materials. To address the conductivity and volume fluctuation issues of SiOx for practical applications, herein, we develop a novel eco-friendly, solvent-free, flammable gas-free approach to envelop SiOx submicron particles in N-doped carbon (denoted as SiOx@NC). The carbon encapsulation not only improves the electrical conductivity but also buffers the volume variation of SiOx, resulting in boosted lithium storage performances. Specifically, the as-prepared SiOx@NC affords high reversible capacity (774 mA h gāˆ’1), ideal rate capability, and long-term durability (112% capacity retention over 500 cycles). It is expected that the solvent-free, flammable gas-free method we developed here can be generally applied to other high-capacity anode materials, such as Si, Sn, and Sb.

Graphical abstract: Enveloping SiOx in N-doped carbon for durable lithium storage via an eco-friendly solvent-free approach

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Article information


Submitted
14 Jan 2020
Accepted
20 Jun 2020
First published
23 Jun 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Enveloping SiOx in N-doped carbon for durable lithium storage via an eco-friendly solvent-free approach

G. Hu, K. Zhong, R. Yu, Z. Liu, Y. Zhang, J. Wu, L. Zhou and L. Mai, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA00540A

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