Labyrinth-inspired nitrogen-sulfur co-doped reduced holey graphene oxide/carbonized cellulose paper: A permselective and multifunctional interlayer for high-performance lithium-sulfur batteries

被引:40
作者
Chen, Peng [1 ]
Fu, Yongsheng [1 ]
Wu, Zhen [1 ]
Xia, Jiawei [1 ]
Zhou, Yan [1 ]
Xu, Jianbo [2 ]
Zhu, Junwu [1 ]
Wang, Xin [1 ]
机构
[1] Nanjing Univ Sci & Technol, Key Lab Soft Chem & Funct Mat, Minist Educ, Nanjing 210094, Jiangsu, Peoples R China
[2] Changzhou Baili Lithium Battery Co Ltd, Changzhou 213022, Peoples R China
基金
中国国家自然科学基金;
关键词
Li-S batteries; N; S co-doped reduced holey graphene oxide/carbonized cellulose paper; Interlayer; 3D labyrinth-like structure; Permselectivity; POROUS GRAPHENE; CARBON NANOTUBES; LONG-LIFE; POLYSULFIDE; NANOSHEETS; ELECTRODE;
D O I
10.1016/j.jpowsour.2019.226728
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, we report a rational design and facile synthetic process for the construction of a 3-dimensional N, S co-doped reduced holey graphene oxide/carbonized cellulose paper as interlayer in Li-S batteries. The interlayer has a labyrinth-like structure with plenty of nanosized holes to achieve the permselectivity for Li ions and effective intercept for polysulfides. The coin cell with the interlayer shows a high initial discharge capacity of 1263.5 mAh/g at 0.2 C, a low capacity fading rate of 0.0487% per cycle for 300 cycles at 1 C, and an excellent rate performance of 864.6 mAh/g at 2 C. Moreover, this cell also has excellent anti-self-discharge property and a high areal capacity of 6.1 mA h/cm(2) at a sulfur loading of 8.1 mg/cm(2) using aluminum foil as the current collector. Thus, this work suggests the permselective and multifunctional interlayer as a practical and effective strategy for the application in the high-performance Li-S battery.
引用
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页数:10
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