Preparation of CuO@PPy hybrid nanomaterials as high cyclic stability anode of lithium‐ion battery

Abstract

Over the recent 20 years, numerous researches have focused on the lithium-ion batteries anodes of MOx 3d-metal oxides which have a high specific capacity. For example, the specific capacity of CuO material as an anode is ∼670 mAh g −1. Unfortunately, serious capacity degradation limits their promising applicability. To improve cyclic stability, PPy is covered on CuO surface to prepare CuO@PPy coreshell hybrid materials by chemical polymerisation. Pyrrole amount plays an important role on control the PPy shell thickness. After PPy coating, the lithium-ion battery cycling stability and coulombic efficiency have been improved greatly, and CP-5 sample has the best cyclic stability and coulombic efficiency. The capacity retention of bare CuO is only 27.9% after 200 cycles. By contrast, the capacity retention of CP-5 sample is ∼100%. The flexible conducting polymers shell (PPy) lead to improved cyclic stability. These results give a strategy to solve MOx 3d-metal oxide capacity degradation as Lithium-ion batteries anode.

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

“…The coating significantly enhanced the available storage capability and cycling stability. Similar results have been reported for this system elsewhere (Feng et al 2020). Using a wet process a slightly thinner coating of PPy (about 3 nm) was identified as an optimum thickness for a LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) electrode in a lithiumion battery (Li et al 2019f).…”

Recent Progresses on Applications of Conducting Polymers for Modifying Electrode of Rechargeable Batteries

“…The CPs have attracted tremendous attention in terms of modifying electrode due to their advantages of constructing efficient electron transport network, inhibiting side reactions at the electrode/electrolyte interface, and improving the stability of electrode structure. First, CPs have excellent processability, which can be combined with materials of different structures to construct unique composite structures such as hollow, [18,19] core-shell, [20,21] sandwich, [22][23][24] yolk-shell, [25,26] and intercalation [27][28][29] to optimize the electron transport path and increase utilization of active materials. Second, the self-healing and doping properties of CPs can effectively prevent the contact between the electrode and electrolyte directly, while absorbing by-products rooted in the decomposition of electrolyte to weaken the damage for electrode.…”