PEDOT-PSS coated ZnO/C hierarchical porous nanorods as ultralong-life anode material for lithium ion batteries

Abstract

ZnO/C hierarchical porous nanorods were synthesized through one-pot wet-chemical reaction followed by thermal calcination. It was found that ZnO/C porous nanorods are composed of numerous nanograins, exhibiting a hierarchical micro/nanostructure.In-situ synchrotron high energy X-ray diffraction study revealed that ZnO/C hierarchical porous nanorods involve a two-step reversible lithiation mechanism during charge/discharge; and part of ZnO and Zn remain at the end of the first discharge and charge process, respectively, leading to a low coulombic efficiency in the initial few cycles. The electrochemical test demonstrated that the reversible capacity and the rate performance of ZnO/C hierarchical porous nanorods anode have been greatly improved by PEDOT-PSS coating, which could maintain a reversible capacity of 623.94 mAh g -1 after 1500 cycles at 1 C. Its excellent high rate capability and long cycle stability were attributed to the high electronic conductivity of PEDOT-PSS coating layer and the hierarchical structures of ZnO/C porous nanorods.

General Synthesis of Transition Metal Oxide Ultrafine Nanoparticles Embedded in Hierarchically Porous Carbon Nanofibers as Advanced Electrodes for Lithium Storage

“…The gradual increasing of capacity during cycling process was generally attributed to the gradual decomposition of the irreversible Li 2 O formed in the 1 st discharge process, the interfacial lithium storage and/or the wetting problem between the electrode and electrolytes, which will result in a gradually increased utilization of active materials upon continuous cycling. [12,52] The minor capacity fluctuation during the long-cycling test could be attributed to the unstability of the SEI film, the electrolyte degradation, the reaction of oxygen-containing functional groups on the carbon with lithium ions, and/or the small temperature fluctuation of the environment. [53] To further understand the outstanding electrochemical performance of ZnO UNPs@HPCNFs, TEM analysis (Figure 5f) was conducted to examine the morphological changes in the electrode after 500 charge/discharge cycles at 3 A g -1 .…”

Inkjet-Printed Graphene/PEDOT:PSS Temperature Sensors on a Skin-Conformable Polyurethane Substrate

“…Due to its favourable electrical and optical properties, PEDOT:PSS has been utilized in various applications. This includes, but is not limited to, transparent electrodes for indium tin oxide-free organic light emitting diodes (OLEDs) and polymer solar cells (PSCs), anode material together with ZnO/C hierarchical porous nanorods for lithium ion batteries, and composite electrodes with multi-walled carbon nanotubes for supercapacitors19202122. Moreover, related to this study, PEDOT has also been used for thermal sensors23.…”

A High‐Performance Lithium‐Ion Capacitor Based on 2D Nanosheet Materials

“…36‐1451, Figure S1, Supporting Information) and Mn 3 O 4 ‐graphene (MO‐G) (JCPDS Card No. 24‐0734, Figure S1, Supporting Information), respectively . No other impurity phases were observed in all synthesized materials.…”