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Sandwich–like Structure of Carbon Fluoride/Graphene Oxide/Polyacrylonitrile Cathode for Lithium and Sodium Batteries
Author(s) -
Liu Wen,
Zhan BinXin,
Shi Bin,
Li Yong,
Guo Rui,
Pei HaiJuan,
Xie JingYing
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600712
Subject(s) - polyacrylonitrile , graphene , materials science , electrochemistry , lithium (medication) , oxide , coating , chemical engineering , polarization (electrochemistry) , cathode , electrode , fluorine , inorganic chemistry , nanotechnology , composite material , chemistry , polymer , metallurgy , medicine , endocrinology , engineering
Carbon fluoride/graphene oxide/polyacrylonitrile (CF x /GO/PAN, denoted as CGP) electrodes are prepared for lithium primary and sodium secondary batteries. The introduction of GO sheets and PAN built a sandwich‐like structure. The rate performances of Li/CGP batteries verify that PAN and GO materials have negligible effects on the electrochemical properties of lithium primary batteries. In Na/CGP batteries, GO sheets have more defects to facilitate sodium ions transfer and offer more active sites for NaF deposition and decomposition. Meanwhile, the GO network coating of the CF x particles confines active fluorine during the cycles. Cubic and nanoscale discharge products of NaF form both on the surface of CF x particles and the GO sheets, respectively. Na/CGF batteries achieve an initial discharge capacity of 507.0 mAh g −1 and a voltage polarization of 0.75 V, except in the first cycle. These results demonstrate that CGP electrodes with a sandwich‐like structure have favorable electrochemical properties, resulting in the synergetic effect of GO sheets and PAN.