Binder-free nitrogen-doped carbon paper electrodes derived from polypyrrole/cellulose composite for Li-O2 batteries

JOURNAL OF POWER SOURCES

卷:306

Article

Liu, Jia¹  Wang, Zhaohui²  Zhu, Jiefang^1,2 

[1] Uppsala Univ, Dept Chem, Angstrom Lab, Box 538, SE-75121 Uppsala, Sweden

[2] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China

关键词: Nitrogen-doped carbon paper electrode;    Binder-free;    Free-standing;    Li-O-2 battery;    Bird's nest microstructure;    N-containing functional group;   

DOI  :  10.1016/j.jpowsour.2015.12.074

来源: Elsevier

【 摘 要 】

This work presents a novel binder-free nitrogen-doped carbon paper electrode (NCPE), which was derived from a N-rich polypyrrole (PPy)/cellulose-chopped carbon filaments (CCFs) composite, for Li-O-2 batteries. The fabrication of NCPE involved cheap raw materials (e.g., Cladophora sp. green algae) and easy operation (e.g., doping N by a carbonization of N-rich polymer), which is especially suitable for large-scale production. The NCPE exhibited a bird's nest microstructure, which could provide the self standing electrode with considerable mechanic durability, fast Li+ and O-2 diffusion, and enough space for the discharge product deposition. In addition, the NCPE contained N-containing function groups, which may promote the electrochemical reactions. Furthermore, binder-free architecture designs can prevent binder-involved parasitic reactions. A Li-O-2 cell with the NCPE displayed a cyclability of more than 30 cycles at a constant current density of 0.1 mA/cm(2). The 1st discharge capacity for a cell with the NCPE reached 8040 mAh/g at a current density of 0.1 mA/cm(2), with a cell voltage around 2.81 V. A cell with the NCPE displayed a coulombic efficiency of 81% on the 1st cycle at a current density of 0.2 mA/cm(2). These results represent a promising progress in the development of a low-cost and versatile paper based O-2 electrode for Li-O-2 batteries. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free