Solid electrolyte interface stabilization via surface oxygen species functionalization in hard carbon for superior performance sodium-ion batteries

TY - JOUR

T1 - Solid electrolyte interface stabilization via surface oxygen species functionalization in hard carbon for superior performance sodium-ion batteries

AU - Xie, Hanjie

AU - Wu, Zhiliang

AU - Wang, Zhenyu

AU - Qin, Ning

AU - Li, Yingzhi

AU - Cao, Yulin

AU - Lu, Zhouguang

N1 - Publisher Copyright: © 2020 The Royal Society of Chemistry.

PY - 2020/2/21

Y1 - 2020/2/21

N2 - Hard carbon is a promising anode material for sodium-ion batteries due to its low cost and high capacity. However, its practical application has been largely hindered by poor rate performance and long-term cycling degradation resulting from the continuous consumption of electrolyte and growth of a solid electrolyte interface (SEI). Here, we propose a facile oxygen plasma treatment strategy to modify the surface of hard carbon to stabilize the SEI. By this method, the specific capacity has been considerably enhanced from 225 mA h g-1 (for the pristine hard carbon sample) to 325 mA h g-1 at a current rate of 50 mA g-1. Furthermore, the modified sample demonstrated long-term cycling stability and remarkable rate performance. The performance enhancement was attributed to the stabilization of the solid electrolyte interface through interaction between the electrolyte and the surface oxygen functional group, reducing the continuous consumption of electrolyte and formation of a stable solid electrolyte interface. This surface treating strategy is simple, scalable, and easy to extend to modify diversified battery materials.

AB - Hard carbon is a promising anode material for sodium-ion batteries due to its low cost and high capacity. However, its practical application has been largely hindered by poor rate performance and long-term cycling degradation resulting from the continuous consumption of electrolyte and growth of a solid electrolyte interface (SEI). Here, we propose a facile oxygen plasma treatment strategy to modify the surface of hard carbon to stabilize the SEI. By this method, the specific capacity has been considerably enhanced from 225 mA h g-1 (for the pristine hard carbon sample) to 325 mA h g-1 at a current rate of 50 mA g-1. Furthermore, the modified sample demonstrated long-term cycling stability and remarkable rate performance. The performance enhancement was attributed to the stabilization of the solid electrolyte interface through interaction between the electrolyte and the surface oxygen functional group, reducing the continuous consumption of electrolyte and formation of a stable solid electrolyte interface. This surface treating strategy is simple, scalable, and easy to extend to modify diversified battery materials.

UR - http://www.scopus.com/inward/record.url?scp=85081100269&partnerID=8YFLogxK

U2 - 10.1039/c9ta12429b

DO - 10.1039/c9ta12429b

M3 - 文章

AN - SCOPUS:85081100269

SN - 2050-7488

VL - 8

SP - 3606

EP - 3612

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 7

ER -