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Polyaniline/Copper Composite Anode Current Collectors Prepared through Electrochemical Polymerization for Lithium‐Ion Batteries
Author(s) -
Zhang Yunyan,
Xiao Rengui,
Liao Xia,
Ma Zhiming,
Huang Yu,
Li Qianqian
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000692
Subject(s) - materials science , polyaniline , anode , current collector , electrode , composite number , electrochemistry , lithium ion battery , composite material , copper , chemical engineering , battery (electricity) , layer (electronics) , polymerization , metallurgy , polymer , chemistry , electrolyte , power (physics) , physics , quantum mechanics , engineering
Herein, a new type of composite anode with a Cu foil current collector modified with polyaniline (PANI) was prepared (PANI/Cu). SEM manifests that the PANI layer is 1.8 μm thick and composed of PANI particles with a diameter of 50 nm nanometers, which provides a large contact surface area to enhance the strength of adhesion to the electrode material. FTIR and UV/Vis analysis confirmed that the PANI layer existed in the emeraldine (conductive) form. Half‐cells were assembled by using PANI/Cu and bare/Cu (both coated with Li 4 Ti 5 O 12 electrode material) as the working electrode, and Li wafers as the counter electrode. Cycling performance tests demonstrated that, after cycling for 500 cycles at 1 C, the discharge capacity was 155.0 mAh g −1 and 137.6 mAh g −1 for PANI/Cu battery and bare/Cu battery, respectively. Electrochemical impedance revealed the impedance of the PANI/Cu battery is decreased effectively by the PANI layer.