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

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Polyaniline/Copper Composite Anode Current Collectors Prepared through Electrochemical Polymerization for Lithium‐Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-06-15 , DOI: 10.1002/celc.202000692
Yunyan Zhang ₁ , Rengui Xiao ₁ , Xia Liao ₁ , Zhiming Ma ₁ , Yu Huang ₁ , Qianqian Li ₁

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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.

中文翻译：

电化学聚合制备锂离子电池用聚苯胺/铜复合阳极集电器

在此，制备了一种新型的复合阳极，该复合阳极具有经聚苯胺（PANI）改性的Cu箔集电器（PANI / Cu）。SEM表明，PANI层为1.8μm厚并且由直径为50nm纳米的PANI颗粒组成，其提供了大的接触表面积以增强对电极材料的粘附强度。FTIR和UV / Vis分析证实PANI层以翡翠（导电）形式存在。通过使用PANI / Cu和裸露/ Cu（均涂有Li ₄ Ti ₅ O ₁₂电极材料）作为工作电极，并使用Li晶片作为对电极来组装半电池。循环性能测试表明，在1 C循环500次之后，放电容量为155.0 mAh g ^-1对于PANI / Cu电池和裸露/ Cu电池，分别为137.6 mAh g ^-1。电化学阻抗表明，PANI / Cu电池的阻抗被PANI层有效降低。

更新日期：2020-07-13

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