Polyaniline/Copper Composite Anode Current Collectors Prepared through Electrochemical Polymerization for Lithium‐Ion Batteries

Abstract

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 Li4Ti5O12 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.

Nanosheet‐like MoO3 and conductive PANI electrodeposited on flexible carbon cloth for self‐supported solid‐state supercapacitor electrode

“…The quinone ring of PMC‐3 is slightly weaker than the benzene ring, indicating that PANI is in the medium oxidation state (in the state of emerald salt). Meanwhile, the ratio of the benzene ring to quinone ring of PMC‐3 is close to 1, indicating that the material possesses good electrochemical performances 35 . With increasing deposition time to 500 and 700 s, the peak intensity of benzene ring increased, and the ratio of benzene ring to quinone ring is over 1 (Figure S3a).…”

“…Meanwhile, the ratio of the benzene ring to quinone ring of PMC-3 is close to 1, indicating that the material possesses good electrochemical performances. 35 With increasing deposition time to 500 and 700 s, the peak intensity of benzene ring increased, and the ratio of benzene ring to quinone ring is over 1 (Figure S3a). In addition, some small variations in the characteristic peak can be attributed to the interaction between the components of the electrode.…”

CVD Conditions for MWCNTs Production and Their Effects on the Optical and Electrical Properties of PPy/MWCNTs, PANI/MWCNTs Nanocomposites by In Situ Electropolymerization

“…In addition, the signal that corresponds to polaron-π* transitions within doped quinoid (Q) structure remains with nanocomposites prepared with CVD CNTs, but it disappears with commercial ones, highlighting a better interaction of the composites with the method used in this study. It is also important to recall that under these conditions, the conductive phase of PANI remains unaltered in the UV region after electropolymerization process [ 117 ]. Recent reports of PANI nanocomposites have demonstrated that the shift of optical absorption band maximum depends on the composition of polymerization bulk solution and polymerization process, which in turn modified the appearance of π-π* and polaron π-transitions [ 114 ], but in our case, such displacements were missing.…”

Intrinsically conducting polymers and their combinations with redox-active molecules for rechargeable battery electrodes: an update

“…Copper foil used as negative electrode support and current collector in lithium-ion batteries has been coated with PANI (Zhang et al 2020e). Storage capability and stability were increased, and the cell impedance decreased.…”