Robust and Fast Lithium Storage Enabled by Polypyrrole-Coated Nitrogen and Phosphorus Co-Doped Hollow Carbon Nanospheres for Lithium-Ion Capacitors
Open Access
- 24 September 2021
- journal article
- research article
- Published by Frontiers Media SA in Frontiers in Chemistry
- Vol. 9, 760473
- https://doi.org/10.3389/fchem.2021.760473
Abstract
Lithium-ion capacitors (LICs) have been proposed as an emerging technological innovation that integrates the advantages of lithium-ion batteries and supercapacitors. However, the high-power output of LICs still suffers from intractable challenges due to the sluggish reaction kinetics of battery-type anodes. Herein, polypyrrole-coated nitrogen and phosphorus co-doped hollow carbon nanospheres (NPHCS@PPy) were synthesized by a facile method and employed as anode materials for LICs. The unique hybrid architecture composed of porous hollow carbon nanospheres and PPy coating layer can expedite the mass/charge transport and enhance the structural stability during repetitive lithiation/delithiation process. The N and P dual doping plays a significant role on expanding the carbon layer spacing, enhancing electrode wettability, and increasing active sites for pseudocapacitive reactions. Benefiting from these merits, the NPHCS@PPy composite exhibits excellent lithium-storage performances including high rate capability and good cycling stability. Furthermore, a novel LIC device based on the NPHCS@PPy anode and the nitrogen-doped porous carbon cathode delivers a high energy density of 149 Wh kg−1 and a high power density of 22,500 W kg−1 as well as decent cycling stability with a capacity retention rate of 92% after 7,500 cycles. This work offers an applicable and alternative way for the development of high-performance LICs.Keywords
This publication has 48 references indexed in Scilit:
- A High‐Energy Lithium‐Ion Capacitor by Integration of a 3D Interconnected Titanium Carbide Nanoparticle Chain Anode with a Pyridine‐Derived Porous Nitrogen‐Doped Carbon CathodeAdvanced Functional Materials, 2016
- A conductive polymer coated MoO3anode enables an Al-ion capacitor with high performanceJournal of Materials Chemistry A, 2016
- Heterogeneous NiCo2O4@polypyrrole core/sheath nanowire arrays on Ni foam for high performance supercapacitorsJournal of Power Sources, 2015
- Intercalation pseudo-capacitive TiNb2O7@carbon electrode for high-performance lithium ion hybrid electrochemical supercapacitors with ultrahigh energy densityNano Energy, 2015
- Nanostructured conductive polymers for advanced energy storageChemical Society Reviews, 2015
- High lithium anodic performance of highly nitrogen-doped porous carbon prepared from a metal-organic frameworkNature Communications, 2014
- Insertion-Type Electrodes for Nonaqueous Li-Ion CapacitorsChemical Reviews, 2014
- Pre-lithiated graphene nanosheets as negative electrode materials for Li-ion capacitors with high power and energy densityJournal of Power Sources, 2014
- The Effect of Cathode and Anode Potentials on the Cycling Performance of Li-Ion CapacitorsJournal of the Electrochemical Society, 2013
- Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion BatteriesACS Nano, 2011